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1

The ATLAS hadronic tile calorimeter: from construction toward physics  

Microsoft Academic Search

The Tile Calorimeter, which constitutes the central section of the ATLAS hadronic calorimeter, is a non-compensating sampling device made of iron and scintillating tiles. The construction phase of the calorimeter is nearly complete, and most of the effort now is directed toward the final assembly and commissioning in the underground experimental hall. The layout of the calorimeter and the tasks

P. Adragna; C. Alexa; K. Anderson; A. Antonaki; V. Batusov; P. Bednar; S. Binet; C. Biscarat; G. Blanchot; A. Bogush; C. Bohm; V. Boldea; M. Bosman; C. Bromberg; J. Budagov; L. Caloba; D. Calvet; J. Carvalho; J. Castelo; M. V. Castillo; M. Cavalli Sforza; V. Cavasinni; A. S. Cerqueira; R. Chadelas; D. Costanzo; F. Cogswell; S. Constantinescu; M. Crouau; C. Cuenca; D. O. Damazio; F. Daudon; M. David; T. Davidek; K. de; T. Del Prete; B. Di Girolamo; S. Dita; J. Dolejsi; Z. Dolezal; A. Dotti; R. Downing; I. Efthymiopoulos; D. Errede; S. Errede; A. Farbin; D. Fassouliotis; I. Fedorko; A. Fenyuk; C. Ferdi; A. Ferrer; V. Flaminio; E. Fullana; V. Giakoumopoulou; O. Gildemeister; V. Giangiobbe; N. Giokaris; A. Gomes; V. Gonzalez; V. Grabsky; P. Grenier; P. Gris; V. Guarino; C. Guicheney; A. Gupta; H. Hakobyan; M. Haney; A. Henriques; E. Higon; S. Holmgren; M. Hurwitz; J. Huston; C. Iglesias; T. Junk; A. Karyukhin; J. Klereborn; I. Korolkov; P. Krivkova; Y. Kulchitsky; Yu. Kurochkin; P. Kuzhir; D. Lambert; T. Le Compte; R. Lefevre; R. Leitner; M. Lembesi; J. Li; M. Liablin; M. Lokajicek; Y. Lomakin; J. M. L. Amengual; A. Lupi; C. Maidantchik; A. Manousakis; S. Maliukov; C. Marques; F. Marroquim; F. Martin; E. Mazzoni; G. Montarou; F. Merritt; A. Miagkov; R. Miller; I. Minashvili; L. Miralles; S. Nemecek; M. Nessi; L. Nodulman; O. Norniella; A. Onofre; M. Oreglia; D. Pantea; D. Pallin; J. Pilcher; J. Pina; J. Pinhao; F. Podlyski; X. Portell; J. Poveda; L. E. Price; L. Pribyl; J. Proudfoot; M. Ramstedt; G. Reinmuth; R. Richards; C. Roda; V. Romanov; P. Rosnet; P. Roy; V. Rumiantsau; N. Russakovich; O. Salto; B. Salvachua; E. Sanchis; H. Sanders; C. Santoni; J. Schlereth; J. G. Saraiva; F. Sarri; I. Satsunkevitch; L.-P. Says; G. Schlager; J. M. Seixas; B. Sellden; P. Shevtsov; M. Shochet; P. Da Silva; J. Silva; V. Simaitis; A. Sissakian; A. Solodkov; O. Solovianov; M. Sosebee; F. Spano; R. Stanek; E. Starchenko; P. Starovoitov; M. Suk; I. Sykora; F. Tang; P. Tas; R. Teuscher; S. Tokar; N. Topilin; J. Torres; V. Tsulaia; D. Underwood; G. Usai; S. Valkar; J. A. Valls; A. Vartapetian; F. Vazeille; I. Vichou; V. Vinogradov; I. Vivarelli; M. Volpi; A. White; A. Zaitsev; A. Zenine; T. Zenis

2006-01-01

2

The CALICE hadron scintillator tile calorimeter prototype  

NASA Astrophysics Data System (ADS)

The CALICE Collaboration develops high granularity calorimeters to achieve excellent energy resolution at ILC. One type is a four million channel scintillator tile Hadron Calorimeter (AHCAL) read out with novel photodetectors—Silicon PhotoMultipliers (SiPM). A 1 m 3 prototype with 7608 channels was built in order to test the Particle Flow concept and to gain experience with the novel techniques. The prototype and MEPhI/Pulsar SiPMs have demonstrated excellent performance and stability during several months of testing at CERN and FNAL in 2006-2008. Less than 0.08% of SiPMs are broken. The SiPM calibration and monitoring procedures have been developed. Improved SiPMs have been developed by CPTA for the next engineering prototype and their properties are discussed. This prototype will have very slim sensitive planes with electronics inside. It addresses all engineering issues relevant to the real calorimeter at ILC.

Buanes, T.; Danilov, M.; Eigen, G.; Göttlicher, P.; Markin, O.; Reinecke, M.; Tarkovsky, E.; Calice Collaboration

2010-11-01

3

ATLAS tile hadronic calorimeter signal reconstruction and performance.  

E-print Network

We present the signal reconstruction and performance of ATLAS tile hadronic calorimeter (TileCal) using proton-proton collision data. The signal reconstruction algorithms, optimal filter and match filter, are discussed together with their signal reconstruction performances. We demonstrate the effects of increasing LHC pile-up conditions on noise description and signal reconstruction. Furthermore, the average energy deposited in a TileCal cell and the TileCal response to single isolated charged particles are presented. Finally, we discuss the TileCal upgrade plans during LHC shutdowns.

Nguyen, D; The ATLAS collaboration

2014-01-01

4

Developments for a scintillator tile sampling hadron calorimeter with 'longitudinal' tile configuration  

E-print Network

In a scintillation tile calorimeter with wavelength shifting fiber readout significant simplifications of the construction and the assembly are possible if the tiles are oriented "longitudinally", i.e. in r-phi plane for a barrel configuration. For a hybrid calorimeter consisting of a scintillator tile hadron compartment and a sufficiently containing LAr EM compartment, as proposed for the ATLAS detector, good jet resolution is predicted by simulations. The aim of the proposal is to construct a test module and to check the simulation results by test beam measurements. Several component tests and further simulations and engineering studies are needed to optimize the design of a large calorimeter structure.

Bosman, M; Teubert, F; Blaj, C; Boldea, V; Dita, S; Ajaltouni, Z; Badaud, F; Bouhemaid, N; Brette, P; Brossard, M; Chadelas, R; Chevaleyre, J C; Crouau, M; Daudon, F; Dugne, J J; Michel, B; Montarou, G; Muanza, G S; Pallin, D; Says, L P; Vazeille, F; Gildemeister, O; Nessi, M; Poggioli, L; Sonderegger, P; Amorin, A; Ferreira, P; Gomes, A; Henriques, A; Maio, A; Peralta, L; Leitner, M; Suk, M; Kostrikov, M; Kulagin, M; Lapin, V; Protopopov, Y; Solodkov, Alexander A; Zaitsev, A; Hakobian, H

1993-01-01

5

Calibration and monitoring systems of the ATLAS tile hadron calorimeter  

NASA Astrophysics Data System (ADS)

The TileCal is the hadronic calorimeter covering the most central region of the ATLAS experiment at LHC. It is a sampling calorimeter with iron plates as absorber and plastic scintillating tiles as the active material. The scintillation light produced by the passage of charged particles is transmitted by wavelength shifting fibers to about 10,000 photomultiplier tubes (PMTs). Integrated to the calorimeter, there is a composite device that allows to monitor and/or equalize the signals at various stages of their formation. This device is based on signal generation from different sources: radioactive, LASER, charge injection and minimum bias events produced in proton-proton collisions. Recent performances of these systems are presented.

Boumediene, D.

2013-08-01

6

Results from a new combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

Microsoft Academic Search

A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 10 to 300 GeV at an incident angle ? of about

S. Akhmadaliev; F. Albiol; P. Amaral; G. Ambrosini; A. Amorim; K. Anderson; M. L. Andrieux; B. Aubert; E. Augé; F. Badaud; L. Baisin; F. Barreiro; G. Battistoni; A. Bazan; K. Bazizi; C. Bee; J. Belorgey; A. Belymam; D. Benchekroun; S. Berglund; J. C. Berset; G. Blanchot; A. Bogush; C. Bohm; V. Boldea; W. Bonivento; P. Borgeaud; O. Borisov; M. Bosman; N. Bouhemaid; D. Breton; P. Brette; C. Bromberg; J. Budagov; S. Burdin; L. Caloba; F. Camarena; D. V. Camin; B. Canton; M. Caprini; J. Carvalho; P. Casado; R. Cases; M. V. Castillo; D. Cavalli; M. Cavalli-Sforza; V. Cavasinni; R. Chadelas; M. Chalifour; L. Chekhtman; J. L. Chevalley; I. Chirikov-Zorin; G. Chlachidze; J. C. Chollet; M. Citterio; W. E. Cleland; C. Clement; M. Cobal; F. Cogswell; J. Colas; J. Collot; S. Cologna; S. Constantinescu; G. Costa; D. Costanzo; J.-P. Coulon; M. Crouau; P. Dargent; F. Daudon; M. David; T. Davidek; J. Dawson; K. De; E. Delagnes; C. de la Taille; J. Del Peso; T. Del Prete; P. de Saintignon; B. Di Girolamo; B. Dinkespiller; S. Dita; F. Djama; J. Dodd; J. Dolejsi; Z. Dolezal; R. Downing; J.-J. Dugne; P.-Y. Duval; D. Dzahini; I. Efthymiopoulos; D. Errede; S. Errede; F. Etienne; H. Evans; G. Eynard; F. Farida; P. Fassnacht; N. Fedyakin; J. Fernandez De Troconiz; A. Ferrari; A. Ferrer; V. Flaminio; D. Fournier; G. Fumagalli; E. Gallas; G. Garcia; M. Gaspar; F. Gianotti; O. Gildemeister; V. Glagolev; V. Glebov; A. Gomes; V. Gonzalez; S. Gonzalez De La Hoz; A. Gordeev; H. A. Gordon; V. Grabsky; E. Grauges; Ph. Grenier; H. Hakopian; M. Haney; C. Hebrard; A. Henriques; F. Henry-Couannier; L. Hervas; E. Higon; S. Holmgren; J. Y. Hostachy; A. Hoummada; M. Huet; J. Huston; D. Imbault; Yu. Ivanyushenkov; Y. Jacquier; S. Jezequel; E. Johansson; R. Jones; A. Juste; S. Kakurin; P. Karst; A. Karyukhin; Yu. Khokhlov; J. Khubua; V. Klyukhin; G. Kolachev; V. Kolomoets; S. Kopikov; M. Kostrikov; V. Kovtun; V. Kozlov; P. Krivkova; V. Kukhtin; M. Kulagin; Y. Kulchitsky; M. Kuzmin; L. Labarga; G. Laborie; D. Lacour; S. Lami; V. Lapin; O. Le Dortz; M. Lefebvre; T. Leflour; R. Leitner; M. Leltchouk; A. Le Van Suu; J. Li; C. Liapis; O. Linossier; D. Lissauer; F. Lobkowicz; M. Lokajicek; Yu. Lomakin; O. Lomakina; J. M. Lopez Amengual; J.-P. Lottin; B. Lund-Jensen; J. Lundquist; A. Maio; D. Makowiecki; S. Malyukov; L. Mandelli; B. Mansoulié; L. Mapelli; C. P. Marin; P. Marrocchesi; F. Marroquin; L. Martin; O. Martin; Ph. Martin; A. Maslennikov; N. Massol; M. Mazzanti; E. Mazzoni; F. Merritt; B. Michel; R. Miller; I. Minashvili; L. Miralles; A. Mirea; E. Mnatsakanian; E. Monnier; G. Montarou; G. Mornacchi; M. Mosidze; M. Moynot; G. S. Muanza; E. Nagy; P. Nayman; S. Nemecek; M. Nessi; D. Nicod; S. Nicoleau; M. Niculescu; J. M. Noppe; A. Onofre; D. Pallin; D. Pantea; R. Paoletti; I. C. Park; G. Parrour; J. Parsons; J. Pascual; A. Pereira; L. Perini; J. A. Perlas; P. Perrodo; P. Pétroff; J. Pilcher; J. Pinhao; H. Plothow-Besch; L. Poggioli; S. Poirot; L. Price; Y. Protopopov; J. Proudfoot; O. Pukhov; P. Puzo; V. Radeka; D. Rahm; G. Reinmuth; J. F. Renardy; G. Renzoni; S. Rescia; S. Resconi; R. Richards; J.-P. Richer; I. Riu; C. Roda; J. Roldan; J. Romance; V. Romanov; P. Romero; N. Russakovich; P. Sala; E. Sanchis; H. Sanders; C. Santoni; J. Santos; D. Sauvage; G. Sauvage; A. Savoy-Navarro; L. Sawyer; L.-P. Says; A. Schaffer; P. Schwemling; J. Schwindling; N. Seguin-Moreau; W. Seidl; J. M. Seixas; B. Sellden; M. Seman; A. Semenov; V. Senchishin; L. Serin; E. Shaldaev; A. Shchelchkov; M. Shochet; V. Sidorov; J. Silva; V. Simaitis; S. Simion; A. Sissakian; I. Soloviev; R. Snopkov; J. Soderqvist; A. Solodkov; P. Sonderegger; K. Soustruznik; F. Spano; R. Spiwoks; R. Stanek; E. Starchenko; P. Stavina; R. Stephens; S. Studenov; M. Suk; A. Surkov; I. Sykora; J. P. Taguet; H. Takai; F. Tang; S. Tardell; P. Tas; J. Teiger; F. Teubert; J. Thaler; J. Thion; Y. Tikhonov; V. Tisserand; S. Tisserant; S. Tokar; N. Topilin; Z. Trka; M. Turcotte; S. Valkar; M. J. Varanda; A. Vartapetian; F. Vazeille; I. Vichou; P. Vincent; V. Vinogradov; S. Vorozhtsov; V. Vuillemin; C. Walter; A. White; M. Wielers; I. Wingerter-Seez; H. Wolters; N. Yamdagni; G. Yarygin; C. Yosef; A. Zaitsev; R. Zitoun; Y. P. Zolnierowski

2000-01-01

7

Results from a combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

Microsoft Academic Search

The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300 GeV at an incident angle ? of about

Z. Ajaltouni; F. Albiol; A. Alifanov; P. Amaral; G. Ambrosini; A. Amorim; K. Anderson; A. Astvatsaturov; B. Aubert; E. Augé; D. Autiero; G. Azuelos; F. Badaud; L. Baisin; G. Battistoni; A. Bazan; C. Bee; G. Bellettini; S. Berglund; J. C. Berset; C. Blaj; G. Blanchot; E. Blucher; A. Bogush; C. Bohm; V. Boldea; O. Borisov; M. Bosman; N. Bouhemaid; P. Brette; C. Bromberg; M. Brossard; J. Budagov; S. Buono; L. Caloba; D. V. Camin; B. Canton; P. Casado; D. Cavalli; M. Cavalli-Sforza; V. Cavasinni; R. Chadelas; R. Chase; A. Chekhtman; J.-C. Chevaleyre; J. L. Chevalley; I. Chirikov-Zorin; G. Chlachidze; J. C. Chollet; M. Cobal; F. Cogswell; J. Colas; J. Collot; S. Cologna; S. Constantinescu; G. Costa; D. Costanzo; L. Cozzi; M. Crouau; P. Dargent; F. Daudon; M. David; T. Davidek; J. Dawson; K. de; C. de la Taille; T. Del Prete; P. Depommier; P. de Saintignon; A. De Santo; B. Dinkespiller; B. Di Girolamo; S. Dita; J. Dolejsi; Z. Dolezal; R. Downing; J.-J. Dugne; P.-Y. Duval; D. Dzahini; I. Efthymiopoulos; D. Errede; S. Errede; F. Etienne; H. Evans; P. Fassnacht; N. Fedyakin; A. Ferrari; P. Ferreira; A. Ferrer; V. Flaminio; D. Fouchez; D. Fournier; G. Fumagalli; E. Gallas; M. Gaspar; F. Gianotti; O. Gildemeister; D. M. Gingrich; V. Glagolev; V. Golubev; A. Gomes; J. Gonzalez; H. A. Gordon; V. Grabsky; H. Hakopian; M. Haney; S. Hellman; A. Henriques; S. Holmgren; P. F. Honoré; J. Y. Hostachy; J. Huston; Yu. Ivanyushenkov; S. Jezequel; E. Johansson; R. Jones; A. Juste; S. Kakurin; G. Karapetian; A. Karyukhin; Yu. Khokhlov; V. Klyukhin; V. Kolomoets; S. Kopikov; M. Kostrikov; V. Kovtun; V. Kukhtin; M. Kulagin; Y. Kulchitsky; G. Laborie; S. Lami; V. Lapin; A. Lebedev; M. Lefebvre; T. Leflour; R. Leitner; E. León-Florián; C. Leroy; A. Le Van Suu; J. Li; I. Liba; O. Linossier; M. Lokajicek; Yu. Lomakin; O. Lomakina; B. Lund-Jensen; G. Mahout; A. Maio; S. Malyukov; L. Mandelli; B. Mansoulié; L. Mapelli; C. P. Marin; F. Marroquin; L. Martin; M. Mazzanti; E. Mazzoni; F. Merritt; B. Michel; R. Miller; I. Minashvili; A. Miotto; L. Miralles; E. Mnatsakanian; E. Monnier; G. Montarou; G. Mornacchi; G. S. Muanza; E. Nagy; S. Nemecek; M. Nessi; S. Nicoleau; J. M. Noppe; C. Olivetto; S. Orteu; C. Padilla; D. Pallin; D. Pantea; G. Parrour; A. Pereira; L. Perini; J. A. Perlas; P. Pétroff; J. Pilcher; J. L. Pinfold; H. Plothow-Besch; L. Poggioli; S. Poirot; G. Polesello; L. Price; Y. Protopopov; J. Proudfoot; O. Pukhov; V. Radeka; D. Rahm; G. Reinmuth; J. F. Renardy; G. Renzoni; S. Resconi; R. Richards; I. Riu; V. Romanov; B. Ronceux; V. Rumyantsev; N. Russakovich; P. Sala; H. Sanders; G. Sauvage; P. Savard; A. Savoy-Navarro; L. Sawyer; L.-P. Says; A. Schaffer; C. Scheel; P. Schwemling; J. Schwindling; N. Seguin-Moreau; J. M. Seixas; B. Sellden; M. Seman; A. Semenov; V. Senchishin; L. Serin; A. Shchelchkov; V. Shevtsov; M. Shochet; V. Sidorov; V. Simaitis; S. Simion; A. Sissakian; A. Solodkov; P. Sonderegger; K. Soustruznik; R. Stanek; E. Starchenko; D. Stephani; R. Stephens; S. Studenov; M. Suk; A. Surkov; F. Tang; S. Tardell; P. Tas; J. Teiger; F. Teubert; J. Thaler; V. Tisserand; S. Tisserant; S. Tokar; N. Topilin; Z. Trka; A. Turcot; M. Turcotte; S. Valkar; A. Vartapetian; F. Vazeille; I. Vichou; V. Vinogradov; S. Vorozhtsov; V. Vuillemin; D. Wagner; A. White; I. Wingerter-Seez; N. Yamdagni; G. Yarygin; C. Yosef; A. Zaitsev; M. Zdrazil; R. Zitoun; Y. P. Zolnierowski

1997-01-01

8

Construction and performance of an iron-scintillator hadron calorimeter with longitudinal tile configuration  

Microsoft Academic Search

The first prototype of a scintillator tile hadron calorimeter with longitudinal tile orientation and wavelength shifting fiber readout has been built and tested with pion, electron and muon beams at the CERN SPS. This innovative geometry combines good performance and a simple and cost effective assembly procedure. Calibration and monitoring of this detector have also been investigated.

F. Ariztizabal; M. Bosman; M. Cavalli-Sforza; I. Efthymiopoulos; C. Padilla; F. Teubert; R. Arsenescu; C. Blag; V. Boldea; S. Dita; Ziad J Ajaltouni; F. Badaud; N. Bouhemaid; P. Brette; M. Brossard; R. Chadelas; J.-C. Chevaleyre; M. Crouau; F. Daudon; J.-J. Dugne; B. Michel; G. Montarou; G. S. Muanza; D. Pallin; S. Poirot; L.-P. Says; F. Vazeille; O. Gildemeister; A. Henriques; J. Ivarsson; Marzio Nessi; Luc Poggioli; P. Sonderegger; A. Amorim; P. Ferreira; A. Gomes; A. Maio; L. Peralta; M. David; M E Kostrikov; M. Kulagin; V. Lapin; Yu Protopopov; A A Solodkov; A. Zaitsev; R. Leitner; M. Suk; P. Tas; L P Calôba; M. Gaspar; F. Marroquin; A. Pereira; J. M. Seixas; Z D Thomé; H H Hakopian

1994-01-01

9

Construction and performance of an iron-scintillator hadron calorimeter with longitudinal tile configuration  

NASA Astrophysics Data System (ADS)

The first prototype of a scintillator tile hadron calorimeter with longitudinal tile orientation and wavelength shifting fiber readout has been built and tested with pion, electron and muon beams at the CERN SPS. This innovative geometry combines good performance and a simple and cost effective assembly procedure. Calibration and monitoring of this detector have also been investigated.

Ariztizabal, F.; Bosman, M.; Cavalli-Sforza, M.; Efthymiopoulos, I.; Padilla, C.; Teubert, F.; Arsenescu, R.; Blag, C.; Boldea, V.; Dita, S.; Ajaltouni, Z.; Badaud, F.; Bouhemaid, N.; Brette, P.; Brossard, M.; Chadelas, R.; Chevaleyre, J.-C.; Crouau, M.; Daudon, F.; Dugne, J.-J.; Michel, B.; Montarou, G.; Muanza, G. S.; Pallin, D.; Poirot, S.; Says, L.-P.; Vazeille, F.; Gildemeister, O.; Henriques, A.; Ivarsson, J.; Nessi, M.; Poggioli, L.; Sonderegger, P.; Amorim, A.; Ferreira, P.; Gomes, A.; Maio, A.; Peralta, L.; David, M.; Kostrikov, M.; Kulagin, M.; Lapin, V.; Protopopov, Y.; Solodkov, A.; Zaitsev, A.; Leitner, R.; Suk, M.; Tas, P.; Caloba, L.; Gaspar, M.; Marroquin, F.; Pereira, A.; Seixas, J. M.; Thome, Z.; Hakopian, H.

1994-10-01

10

Results from a combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

Microsoft Academic Search

The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300~GeV at an incident angle $\\\\theta$ of about 11$^\\\\circ$

Ziad J Ajaltouni; F Albiol; A Alifanov; P Amaral; G Ambrosini; A Amorim; K J Anderson; A R Astvatsaturov; Bernard Aubert; E Augé; D Autiero; Georges Azuelos; F Badaud; L Baisin; G Battistoni; A Bazan; C P Bee; Giorgio Bellettini; S R Berglund; J C Berset; C Blaj; G Blanchot; E Blucher; A A Bogush; C Bohm; V Boldea; O N Borisov; M Bosman; N Bouhemaid; P Brette; C Bromberg; M Brossard; Yu A Budagov; S Buono; L P Calôba; D V Camin; B Canton; M P Casado; D Cavalli; M Cavalli-Sforza; V Cavasinni; R Chadelas; Robert L Chase; A Chekhtman; J C Chevaleyre; J L Chevalley; I E Chirikov-Zorin; G Chlachidze; J C Chollet; M Cobal; F Cogswell; Jacques Colas; J Collot; S Cologna; S Constantinescu; G Costa; D Costanzo; L Cozzi; M Crouau; P Dargent; F Daudon; M David; T Davidek; J Dawson; K De; C de La Taille; T Del Prete; P Depommier; P de Saintignon; A De Santo; B Dinkespiler; B Di Girolamo; S Dita; J Dolejsi; Z Dolezal; R Downing; J J Dugne; P Y Duval; D Dzahini; I Efthymiopoulos; D Errede; S Errede; F Etienne; H Evans; P Fassnacht; N N Fedyakin; A Ferrari; P Ferreira; A Ferrer; Vincenzo Flaminio; D Fouchez; D Fournier; G Fumagalli; E J Gallas; M Gaspar; F Gianotti; O Gildemeister; D M Gingrich; V V Glagolev; V B Golubev; A Gómez; J González; H A Gordon; V Grabskii; H H Hakopian; M Haney; S Hellman; A Henriques; S O Holmgren; P F Honoré; J Y Hostachy; J Huston; Yu M Ivanyushenkov; S Jézéquel; E K Johansson; R Jones; A Juste; S Kakurin; G V Karapetian; A N Karyukhin; Yu A Khokhlov; V I Klioukhine; V Kolomoets; S V Kopikov; M E Kostrikov; V E Kovtun; V V Kukhtin; M Kulagin; Yu A Kulchitskii; G Laborie; S Lami; V Lapin; A Lebedev; M Lefebvre; T Le Flour; R Leitner; E León-Florián; C Leroy; A Le Van-Suu; J Li; I Liba; O Linossier; M Lokajícek; Yu F Lomakin; O V Lomakina; B Lund-Jensen; G Mahout; A Maio; S N Malyukov; L Mandelli; B Mansoulié; Livio P Mapelli; C P Marin; F Marroquin; L Martin; M Mazzanti; E Mazzoni; F S Merritt; B Michel; R Miller; I A Minashvili; A Miotto; L Miralles; E A Mnatzakanian; E Monnier; G Montarou; Giuseppe Mornacchi; G S Muanza; E Nagy; S Némécek; Marzio Nessi; S Nicoleau; J M Noppe; C Olivetto; S Orteu; C Padilla; D Pallin; D Pantea; G Parrour; A Pereira; L Perini; J A Perlas; P Pétroff; J E Pilcher; James L Pinfold; Luc Poggioli; S Poirot; G Polesello; L Price; Yu Protopopov; J Proudfoot; O Pukhov; V Radeka; David Charles Rahm; G Reinmuth; J F Renardy; G Renzoni; S Resconi; R Richards; I Riu; V Romanov; B Ronceux; V Rumyantsev; N A Rusakovitch; P R Sala; H Sanders; G Sauvage; P Savard; Aurore Savoy-Navarro; L Sawyer; L P Says; A C Schaffer; C V Scheel; P Schwemling; J Schindling; N Seguin-Moreau; J M Seixas; B Selldén; M Seman; A A Semenov; V G Senchyshyn; L Serin; A S Shchelchkov; V P Shevtsov; M J Shochet; V Sidorov; V J Simaitis; S Simion; A N Sissakian; A A Solodkov; P Sonderegger; K Soustruznik; R Stanek; E A Starchenko; D Stephani; R Stephens; S Studenov; M Suk; A Surkov; F Tang; S Tardell; P Tas; J Teiger; F Teubert; J J Thaler; S Tisserant; S Tokár; N D Topilin; Z Trka; A S Turcot; M Turcotte; S Valkár; A H Vartapetian; F Vazeille; I Vichou; V Vinogradov; S B Vorozhtsov; V Vuillemin; D Wagner; Alan R White; I Wingerter-Seez; N Yamdagni; G Yarygin; C Yosef; A Zaitsev; M Zdrazil; R Zitoun; Y Zolnierowski

1996-01-01

11

Performance of the ATLAS Tile Hadronic Calorimeter at LHC in Run 1 and planned upgrades  

E-print Network

The Tile Calorimeter (TileCal) is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider, a key detector for the measurements of hadrons, jets, tau leptons and missing transverse energy. Scintillation light produced in the tiles is transmitted by wavelength shifting fibres to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are digitized before being transferred to off-detector data-acquisition systems. The data quality procedures used during the LHC data-taking and the evolution of the detector status are explained in the presentation. The energy and the time reconstruction performance of the digitized signals is presented and the noise behaviour and its improvement during the detector consolidation in maintenance periods are shown. A set of calibration systems allow monitoring and equalization of the calorimeter channels responses via signal sources that act at every stage of the signal path, from scintillation light to digitized signal...

Solovyanov, Oleg; The ATLAS collaboration

2014-01-01

12

Results from a combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

NASA Astrophysics Data System (ADS)

The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300 GeV at an incident angle ? of about 11° is well-described by the expression {?}/{E} = (( {46.5 ± 6.0%}/{?E+(1.2±0.3)%}) ? (3.2±0.4) {GeV}/{E}. Shower profiles, shower leakage, and the angular resolution of hadronic showers were also studied.

Ajaltouni, Z.; Albiol, F.; Alifanov, A.; Amaral, P.; Ambrosini, G.; Amorim, A.; Anderson, K.; Astvatsaturov, A.; Aubert, B.; Augé, E.; Autiero, D.; Azuelos, G.; Badaud, F.; Baisin, L.; Battistoni, G.; Bazan, A.; Bee, C.; Bellettini, G.; Berglund, S.; Berset, J. C.; Blaj, C.; Blanchot, G.; Blucher, E.; Bogush, A.; Bohm, C.; Boldea, V.; Borisov, O.; Bosman, M.; Bouhemaid, N.; Brette, P.; Bromberg, C.; Brossard, M.; Budagov, J.; Buono, S.; Caloba, L.; Camin, D. V.; Canton, B.; Casado, P.; Cavalli, D.; Cavalli-Sforza, M.; Cavasinni, V.; Chadelas, R.; Chase, R.; Chekhtman, A.; Chevaleyre, J.-C.; Chevalley, J. L.; Chirikov-Zorin, I.; Chlachidze, G.; Chollet, J. C.; Cobal, M.; Cogswell, F.; Colas, J.; Collot, J.; Cologna, S.; Constantinescu, S.; Costa, G.; Costanzo, D.; Cozzi, L.; Crouau, M.; Dargent, P.; Daudon, F.; David, M.; Davidek, T.; Dawson, J.; de, K.; de La Taille, C.; Del Prete, T.; Depommier, P.; de Saintignon, P.; de Santo, A.; Dinkespiller, B.; di Girolamo, B.; Dita, S.; Dolejsi, J.; Dolezal, Z.; Downing, R.; Dugne, J.-J.; Duval, P.-Y.; Dzahini, D.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Etienne, F.; Evans, H.; Fassnacht, P.; Fedyakin, N.; Ferrari, A.; Ferreira, P.; Ferrer, A.; Flaminio, V.; Fouchez, D.; Fournier, D.; Fumagalli, G.; Gallas, E.; Gaspar, M.; Gianotti, F.; Gildemeister, O.; Gingrich, D. M.; Glagolev, V.; Golubev, V.; Gomes, A.; Gonzalez, J.; Gordon, H. A.; Grabsky, V.; Hakopian, H.; Haney, M.; Hellman, S.; Henriques, A.; Holmgren, S.; Honoré, P. F.; Hostachy, J. Y.; Huston, J.; Ivanyushenkov, Yu.; Jezequel, S.; Johansson, E.; Jon-And, K.; Jones, R.; Juste, A.; Kakurin, S.; Karapetian, G.; Karyukhin, A.; Khokhlov, Yu.; Klyukhin, V.; Kolomoets, V.; Kopikov, S.; Kostrikov, M.; Kovtun, V.; Kukhtin, V.; Kulagin, M.; Kulchitsky, Y.; Laborie, G.; Lami, S.; Lapin, V.; Lebedev, A.; Lefebvre, M.; Leflour, T.; Leitner, R.; León-Florián, E.; Leroy, C.; Le van Suu, A.; Li, J.; Liba, I.; Linossier, O.; Lokajicek, M.; Lomakin, Yu.; Lomakina, O.; Lund-Jensen, B.; Mahout, G.; Maio, A.; Malyukov, S.; Mandelli, L.; Mansoulié, B.; Mapelli, L.; Marin, C. P.; Marroquin, F.; Martin, L.; Mazzanti, M.; Mazzoni, E.; Merritt, F.; Michel, B.; Miller, R.; Minashvili, I.; Miotto, A.; Miralles, L.; Mnatsakanian, E.; Monnier, E.; Montarou, G.; Mornacchi, G.; Muanza, G. S.; Nagy, E.; Nemecek, S.; Nessi, M.; Nicoleau, S.; Noppe, J. M.; Olivetto, C.; Orteu, S.; Padilla, C.; Pallin, D.; Pantea, D.; Parrour, G.; Pereira, A.; Perini, L.; Perlas, J. A.; Pétroff, P.; Pilcher, J.; Pinfold, J. L.; Plothow-Besch, H.; Poggioli, L.; Poirot, S.; Polesello, G.; Price, L.; Protopopov, Y.; Proudfoot, J.; Pukhov, O.; Radeka, V.; Rahm, D.; Reinmuth, G.; Renardy, J. F.; Renzoni, G.; Resconi, S.; Richards, R.; Riu, I.; Romanov, V.; Ronceux, B.; Rumyantsev, V.; Russakovich, N.; Sala, P.; Sanders, H.; Sauvage, G.; Savard, P.; Savoy-Navarro, A.; Sawyer, L.; Says, L.-P.; Schaffer, A.; Scheel, C.; Schwemling, P.; Schwindling, J.; Seguin-Moreau, N.; Seixas, J. M.; Sellden, B.; Seman, M.; Semenov, A.; Senchishin, V.; Serin, L.; Shchelchkov, A.; Shevtsov, V.; Shochet, M.; Sidorov, V.; Simaitis, V.; Simion, S.; Sissakian, A.; Solodkov, A.; Sonderegger, P.; Soustruznik, K.; Stanek, R.; Starchenko, E.; Stephani, D.; Stephens, R.; Studenov, S.; Suk, M.; Surkov, A.; Tang, F.; Tardell, S.; Tas, P.; Teiger, J.; Teubert, F.; Thaler, J.; Tisserand, V.; Tisserant, S.; Tokar, S.; Topilin, N.; Trka, Z.; Turcot, A.; Turcotte, M.; Valkar, S.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vinogradov, V.; Vorozhtsov, S.; Vuillemin, V.; Wagner, D.; White, A.; Wingerter-Seez, I.; Yamdagni, N.; Yarygin, G.; Yosef, C.; Zaitsev, A.; Zdrazil, M.; Zitoun, R.; Zolnierowski, Y. P.; ATLAS Collaboration (Calorimetry; Data Acquisition)

1997-02-01

13

Performance of the ATLAS Tile Hadronic Calorimeter at LHC in Run 1 and planned upgrades  

NASA Astrophysics Data System (ADS)

The Tile Calorimeter (TileCal) is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider, a key detector for the measurements of hadrons, jets, tau leptons and missing transverse energy. Scintillation light produced in the tiles is transmitted by wavelength shifting fibres to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are digitized before being transferred to off-detector data-acquisition systems. The data quality procedures used during the LHC data-taking and the evolution of the detector status are explained in the presentation. The energy and the time reconstruction performance of the digitized signals is presented and the noise behaviour and its improvement during the detector consolidation in maintenance periods are shown. A set of calibration systems allow monitoring and equalization of the calorimeter channels responses via signal sources that act at every stage of the signal path, from scintillation light to digitized signal. These partially overlapping systems are described in detail, their individual performance is discussed as well as the comparative results from measurements of the evolution of the calorimeter response with time during the full LHC data-taking period. The TileCal upgrade aims at replacing the majority of the on- and off-detector electronics so that all calorimeter signals will be directly digitized and sent to the off-detector electronics in the counting room. To achieve the required reliability, redundancy has been introduced at different levels. For the off-detector electronics a special pre-processor board is being developed, which will take care of the initial trigger processing, while the main data are temporarily stored in the pipeline and de-randomiser memories.

Solovyanov, O.

2014-10-01

14

In-situ probe of the response of the Tile Calorimeter to isolated hadrons  

NASA Astrophysics Data System (ADS)

The Tile calorimeter is the hadronic central barrel of the calorimeter system of the ATLAS experiment for the LHC at CERN. It is based on a sampling technique where scintillating tiles are embedded in iron absorber plates. The tiles are grouped together in cells which are disposed in three different layers. The cells from the two innermost layers cover a ?? × ?? range of 0.1 × 0.1, while the outermost layer covers 0.2 × 0.1. An in-situ method to probe the calorimeter response to single charged hadrons can be established by using the ratio of energy measured in the calorimeter cells over the momentum measured by the inner tracking system. This measurement can be used to place constraints on the systematic uncertainty for the jet and tau energy scales. Results from pp collision data from 2010 and 2011 will be shown and discussed as a function of different layer and barrel section. Finally, comparison to MC simulation will prove the good performance of the detector.

Jennens, D.

2014-06-01

15

Results from a new combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

NASA Astrophysics Data System (ADS)

A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 10 to 300 GeV at an incident angle ? of about 12° is well described by the expression ?/E=((41.9±1.6)%/ E+(1.8±0.1)%)?(1.8±0.1)/E , where E is in GeV. The response to electrons and muons was evaluated. Shower profiles, shower leakage and the angular resolution of hadronic showers were also studied. Results are compared with those from the previous beam test.

Akhmadaliev, S.; Albiol, F.; Amaral, P.; Ambrosini, G.; Amorim, A.; Anderson, K.; Andrieux, M. L.; Aubert, B.; Augé, E.; Badaud, F.; Baisin, L.; Barreiro, F.; Battistoni, G.; Bazan, A.; Bazizi, K.; Bee, C.; Belorgey, J.; Belymam, A.; Benchekroun, D.; Berglund, S.; Berset, J. C.; Blanchot, G.; Bogush, A.; Bohm, C.; Boldea, V.; Bonivento, W.; Borgeaud, P.; Borisov, O.; Bosman, M.; Bouhemaid, N.; Breton, D.; Brette, P.; Bromberg, C.; Budagov, J.; Burdin, S.; Caloba, L.; Camarena, F.; Camin, D. V.; Canton, B.; Caprini, M.; Carvalho, J.; Casado, P.; Cases, R.; Castillo, M. V.; Cavalli, D.; Cavalli-Sforza, M.; Cavasinni, V.; Chadelas, R.; Chalifour, M.; Chekhtman, L.; Chevalley, J. L.; Chirikov-Zorin, I.; Chlachidze, G.; Chollet, J. C.; Citterio, M.; Cleland, W. E.; Clement, C.; Cobal, M.; Cogswell, F.; Colas, J.; Collot, J.; Cologna, S.; Constantinescu, S.; Costa, G.; Costanzo, D.; Coulon, J.-P.; Crouau, M.; Dargent, P.; Daudon, F.; David, M.; Davidek, T.; Dawson, J.; de, K.; Delagnes, E.; de La Taille, C.; Del Peso, J.; Del Prete, T.; de Saintignon, P.; di Girolamo, B.; Dinkespiller, B.; Dita, S.; Djama, F.; Dodd, J.; Dolejsi, J.; Dolezal, Z.; Downing, R.; Dugne, J.-J.; Duval, P.-Y.; Dzahini, D.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Etienne, F.; Evans, H.; Eynard, G.; Farida, F.; Fassnacht, P.; Fedyakin, N.; de Troconiz, J. Fernandez; Ferrari, A.; Ferrari, A.; Ferrer, A.; Flaminio, V.; Fournier, D.; Fumagalli, G.; Gallas, E.; Garcia, G.; Gaspar, M.; Gianotti, F.; Gildemeister, O.; Glagolev, V.; Glebov, V.; Gomes, A.; Gonzalez, V.; Gonzalez de La Hoz, S.; Gordeev, A.; Gordon, H. A.; Grabsky, V.; Grauges, E.; Grenier, Ph.; Hakopian, H.; Haney, M.; Hebrard, C.; Henriques, A.; Henry-Couannier, F.; Hervas, L.; Higon, E.; Holmgren, S.; Hostachy, J. Y.; Hoummada, A.; Huet, M.; Huston, J.; Imbault, D.; Ivanyushenkov, Yu.; Jacquier, Y.; Jezequel, S.; Johansson, E.; Jon-And, K.; Jones, R.; Juste, A.; Kakurin, S.; Karst, P.; Karyukhin, A.; Khokhlov, Yu.; Khubua, J.; Klyukhin, V.; Kolachev, G.; Kolomoets, V.; Kopikov, S.; Kostrikov, M.; Kovtun, V.; Kozlov, V.; Krivkova, P.; Kukhtin, V.; Kulagin, M.; Kulchitsky, Y.; Kuzmin, M.; Labarga, L.; Laborie, G.; Lacour, D.; Lami, S.; Lapin, V.; Le Dortz, O.; Lefebvre, M.; Leflour, T.; Leitner, R.; Leltchouk, M.; van Suu, A. Le; Li, J.; Liapis, C.; Linossier, O.; Lissauer, D.; Lobkowicz, F.; Lokajicek, M.; Lomakin, Yu.; Lomakina, O.; Amengual, J. M. Lopez; Lottin, J.-P.; Lund-Jensen, B.; Lundquist, J.; Maio, A.; Makowiecki, D.; Malyukov, S.; Mandelli, L.; Mansoulié, B.; Mapelli, L.; Marin, C. P.; Marrocchesi, P.; Marroquin, F.; Martin, L.; Martin, O.; Martin, Ph.; Maslennikov, A.; Massol, N.; Mazzanti, M.; Mazzoni, E.; Merritt, F.; Michel, B.; Miller, R.; Minashvili, I.; Miralles, L.; Mirea, A.; Mnatsakanian, E.; Monnier, E.; Montarou, G.; Mornacchi, G.; Mosidze, M.; Moynot, M.; Muanza, G. S.; Nagy, E.; Nayman, P.; Nemecek, S.; Nessi, M.; Nicod, D.; Nicoleau, S.; Niculescu, M.; Noppe, J. M.; Onofre, A.; Pallin, D.; Pantea, D.; Paoletti, R.; Park, I. C.; Parrour, G.; Parsons, J.; Pascual, J.; Pereira, A.; Perini, L.; Perlas, J. A.; Perrodo, P.; Pétroff, P.; Pilcher, J.; Pinhao, J.; Plothow-Besch, H.; Poggioli, L.; Poirot, S.; Price, L.; Protopopov, Y.; Proudfoot, J.; Pukhov, O.; Puzo, P.; Radeka, V.; Rahm, D.; Reinmuth, G.; Renardy, J. F.; Renzoni, G.; Rescia, S.; Resconi, S.; Richards, R.; Richer, J.-P.; Riu, I.; Roda, C.; Roldan, J.; Romance, J.; Romanov, V.; Romero, P.; Russakovich, N.; Sala, P.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Sauvage, D.; Sauvage, G.; Savoy-Navarro, A.; Sawyer, L.; Says, L.-P.; Schaffer, A.; Schwemling, P.; Schwindling, J.; Seguin-Moreau, N.; Seidl, W.; Seixas, J. M.; Sellden, B.; Seman, M.; Semenov, A.; Senchishin, V.; Serin, L.; Shaldaev, E.; Shchelchkov, A.; Shochet, M.; Sidorov, V.; Silva, J.; Simaitis, V.; Simion, S.; Sissakian, A.; Soloviev, I.; Snopkov, R.; Soderqvist, J.; Solodkov, A.; Sonderegger, P.; Soustruznik, K.; Spano', F.; Spiwoks, R.; Stanek, R.; Starchenko, E.; Stavina, P.; Stephens, R.; Studenov, S.; Suk, M.; Surkov, A.; Sykora, I.; Taguet, J. P.; Takai, H.; Tang, F.; Tardell, S.; Tas, P.; Teiger, J.; Teubert, F.; Thaler, J.; Thion, J.; Tikhonov, Y.; Tisserand, V.; Tisserant, S.; Tokar, S.; Topilin, N.; Trka, Z.; Turcotte, M.; Valkar, S.; Varanda, M. J.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vincent, P.; Vinogradov, V.; Vorozhtsov, S.; Vuillemin, V.; Walter, C.; White, A.; Wielers, M.; Wingerter-Seez, I.; Wolters, H.; Yamdagni, N.; Yarygin, G.; Yosef, C.; Zaitsev, A.; Zitoun, R.; Zolnierowski, Y. P.; ATLAS Collaboration (Calorimetry; Data Acquisition)

2000-07-01

16

Results from a combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter  

E-print Network

The first combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 20 to 300~GeV at an incident angle $\\theta$ of about 11$^\\circ$ is well-described by the expression $\\sigma/E = ((46.5 \\pm 6.0)\\%/\\sqrt{E} +(1.2 \\pm 0.3)\\%) \\oplus (3.2 \\pm 0.4)~\\mbox{GeV}/E$. Shower profiles, shower leakage, and the angular resolution of hadronic showers were also studied.

Ajaltouni, Ziad J; Alifanov, A; Amaral, P; Ambrosini, G; Amorim, A; Anderson, K J; Astvatsaturov, A R; Aubert, Bernard; Augé, E; Autiero, D; Azuelos, Georges; Badaud, F; Baisin, L; Battistoni, G; Bazan, A; Bee, C P; Bellettini, Giorgio; Berglund, S R; Berset, J C; Blaj, C; Blanchot, G; Blucher, E; Bogush, A A; Bohm, C; Boldea, V; Borisov, O N; Bosman, M; Bouhemaid, N; Brette, P; Bromberg, C; Brossard, M; Budagov, Yu A; Buono, S; Calôba, L P; Camin, D V; Canton, B; Casado, M P; Cavalli, D; Cavalli-Sforza, M; Cavasinni, V; Chadelas, R; Chase, Robert L; Chekhtman, A; Chevaleyre, J C; Chevalley, J L; Chirikov-Zorin, I E; Chlachidze, G; Chollet, J C; Cobal, M; Cogswell, F; Colas, Jacques; Collot, J; Cologna, S; Constantinescu, S; Costa, G; Costanzo, D; Cozzi, L; Crouau, M; Dargent, P; Daudon, F; David, M; Davidek, T; Dawson, J; De, K; de La Taille, C; Del Prete, T; Depommier, P; de Saintignon, P; De Santo, A; Dinkespiler, B; Di Girolamo, B; Dita, S; Dolejsi, J; Dolezal, Z; Downing, R; Dugne, J J; Duval, P Y; Dzahini, D; Efthymiopoulos, I; Errede, D; Errede, S; Etienne, F; Evans, H; Fassnacht, P; Fedyakin, N N; Ferrari, A; Ferreira, P; Ferrer, A; Flaminio, Vincenzo; Fouchez, D; Fournier, D; Fumagalli, G; Gallas, E J; Gaspar, M; Gianotti, F; Gildemeister, O; Gingrich, D M; Glagolev, V V; Golubev, V B; Gómez, A; González, J; Gordon, H A; Grabskii, V; Hakopian, H H; Haney, M; Hellman, S; Henriques, A; Holmgren, S O; Honoré, P F; Hostachy, J Y; Huston, J; Ivanyushenkov, Yu M; Jézéquel, S; Johansson, E K; Jon-And, K; Jones, R; Juste, A; Kakurin, S; Karapetian, G V; Karyukhin, A N; Khokhlov, Yu A; Klioukhine, V I; Kolomoets, V; Kopikov, S V; Kostrikov, M E; Kovtun, V E; Kukhtin, V V; Kulagin, M; Kulchitskii, Yu A; Laborie, G; Lami, S; Lapin, V; Lebedev, A; Lefebvre, M; Le Flour, T; Leitner, R; León-Florián, E; Leroy, C; Le Van-Suu, A; Li, J; Liba, I; Linossier, O; Lokajícek, M; Lomakin, Yu F; Lomakina, O V; Lund-Jensen, B; Mahout, G; Maio, A; Malyukov, S N; Mandelli, L; Mansoulié, B; Mapelli, Livio P; Marin, C P; Marroquin, F; Martin, L; Mazzanti, M; Mazzoni, E; Merritt, F S; Michel, B; Miller, R; Minashvili, I A; Miotto, A; Miralles, L; Mnatzakanian, E A; Monnier, E; Montarou, G; Mornacchi, Giuseppe; Muanza, G S; Nagy, E; Némécek, S; Nessi, Marzio; Nicoleau, S; Noppe, J M; Olivetto, C; Orteu, S; Padilla, C; Pallin, D; Pantea, D; Parrour, G; Pereira, A; Perini, L; Perlas, J A; Pétroff, P; Pilcher, J E; Pinfold, James L; Poggioli, Luc; Poirot, S; Polesello, G; Price, L; Protopopov, Yu; Proudfoot, J; Pukhov, O; Radeka, V; Rahm, David Charles; Reinmuth, G; Renardy, J F; Renzoni, G; Resconi, S; Richards, R; Riu, I; Romanov, V; Ronceux, B; Rumyantsev, V; Rusakovitch, N A; Sala, P R; Sanders, H; Sauvage, G; Savard, P; Savoy-Navarro, Aurore; Sawyer, L; Says, L P; Schaffer, A C; Scheel, C V; Schwemling, P; Schindling, J; Seguin-Moreau, N; Seixas, J M; Selldén, B; Seman, M; Semenov, A A; Senchyshyn, V G; Serin, L; Shchelchkov, A S; Shevtsov, V P; Shochet, M J; Sidorov, V; Simaitis, V J; Simion, S; Sissakian, A N; Solodkov, A A; Sonderegger, P; Soustruznik, K; Stanek, R; Starchenko, E A; Stephani, D; Stephens, R; Studenov, S; Suk, M; Surkov, A; Tang, F; Tardell, S; Tas, P; Teiger, J; Teubert, F; Thaler, J J; Tisserant, S; Tokár, S; Topilin, N D; Trka, Z; Turcot, A S; Turcotte, M; Valkár, S; Vartapetian, A H; Vazeille, F; Vichou, I; Vinogradov, V; Vorozhtsov, S B; Vuillemin, V; Wagner, D; White, Alan R; Wingerter-Seez, I; Yamdagni, N; Yarygin, G; Yosef, C; Zaitsev, A; Zdrazil, M; Zitoun, R; Zolnierowski, Y

1996-01-01

17

The upgrade of the laser calibration system for the ATLAS hadron calorimeter TileCal  

E-print Network

The Tile Calorimeter (TileCal), the central section of the hadronic calorimeter of the ATLAS experiment, is a key detector component to detect hadrons, jets and taus and to measure the missing transverse energy. TileCal is built of steel and scintillating tiles coupled to optical fibers and read?out by photomultipliers (PMT). The performance of TileCal relies on a continuous, high resolution calibration of the individual response of the 10,000 channels forming the detector. The calibration is based on a three level architecture: a charge injection system used to monitor the full electronics chain including front-end amplifiers, digitizers and event builder blocks for each individual channel; a distributed optical system using laser pulses to excite all PMTs; and a mobile Cesium radiative source which is driven through the detector cell floating inside a pipe system. This architecture allows for a cascade calibration of the electronics, of the PMT and electronics, and of full chain including the active detec...

Spalla, Margherita; The ATLAS collaboration

2014-01-01

18

Technical specification for plate fabrication for the ATLAS Tile Hadron Calorimeter  

SciTech Connect

The Atlas Collaboration, at the European Organization for Nuclear Research (CERN), proposes to build a general purpose proton-proton detector for the Large Hadron Collider (LHC), located in Geneva, Switzerland. The ATLAS collaboration consists of approximately 100 international institutions (universities and research laboratories) with a worldwide distribution. The ATLAS detector includes a large scintillating tile calorimeter using iron as the absorber material. This detector will be used to identify and measure the by-products of proton-proton collisions that occur at the symmetric center. The design of this detector is unique in that the absorber plates are oriented perpendicular to the colliding beam axis, rather than parallel, as is done in most other similar detectors to date. A simplified view of the detector is shown in the figure below.

Hill, N.F.

1995-06-13

19

ATLAS Tile Calorimeter Electronics and Future Upgrade  

E-print Network

The Tile Calorimeter (TileCal) of the ATLAS experiment is the hadronic calorimeter designed for energy reconstruction of hadrons, jets, tau-particles and missing transverse energy. An overview of the on-detector and off-detector TileCal electronics used for ATLAS data taking is given. Upgrade plans for TileCal electronics for the High Luminosity LHC programme in 2024 are discussed, together with R&D activities at different laboratories that target different parts of the TileCal electronics. In particular, a demonstrator prototype for TileCal electronics to be installed during the long shutdown in 2014 is described.

Usai, G; The ATLAS collaboration

2014-01-01

20

Performance of the ATLAS Tile Calorimeter  

NASA Astrophysics Data System (ADS)

The Tile Calorimeter is the central section (0 < |?| < 1.7) of the ATLAS hadronic calorimeter. It is a key detector for the measurement of hadrons, jets, tau leptons decaying hadronically, and missing transverse energy. Because of its very good signal to noise ratio it is also useful for the identification and reconstruction of muons. The calorimeter consists of thin steel plates and 460,000 scintillating tiles configured into 4900 cells, each viewed by two photomultipliers. The calorimeter response is monitored to better than 1% using radioactive source, laser, and electronic charge injection systems. The calibration and performance of the calorimeter have been established through test beam measurements, cosmic ray muons and the large sample of pp collisions acquired during 2011 and 2012. Results on the calorimeter performance will be presented, including the absolute energy scale, time resolution, and associated stabilities. These results demonstrate that the Tile Calorimeter is performing well within the design requirements and is giving essential input to the physics results.

Cole, Stephe

2013-04-01

21

The ATLAS Tile Calorimeter performance at LHC  

NASA Astrophysics Data System (ADS)

The Tile Calorimeter (TileCal), the central section of the hadronic calorimeter of the ATLAS experiment, is a key detector component to detect hadrons, jets, taus and muons and to measure the missing transverse energy. TileCal is built of steel and scintillating tiles coupled to optical fibers and read out by photomultipliers. The calorimeter is equipped with systems that allow to monitor and to calibrate each stage of the read-out system exploiting different signal sources: laser light, charge injection and a radioactive source. The performance of the calorimeter has been measured and monitored using calibration data, random triggered data, cosmic muons, splash events and most importantly the large sample of pp collision events acquired in 2011. Results on the absolute energy scale calibration precision, on the energy and timing uniformity and on the synchronization precision are presented. These results demonstrate that the Tile Calorimeter is performing well within the design requirements and is giving essential input to the physics results.

Hernandez, Y.

2013-08-01

22

Response of the ATLAS Tile calorimeter prototype to muons  

Microsoft Academic Search

A study of high energy muons traversing the ATLAS hadron Tile calorimeter in the barrel region in the energy range between 10 and 300 GeV is presented. Both test beam experimental data and Monte Carlo simulations are given and show good agreement. The Tile calorimeter capability of detecting isolated muons over the above energy range is demonstrated. A signal to

Z. Ajaltouni; F. Albiol; A. Alifanov; P. Amaral; A. Amorim; K. Anderson; C. Angelini; A. Astvatsaturov; D. Autiero; F. Badaud; G. Barreira; S. Berglund; G. Blanchot; E. Blucher; C. Blaj; A. Bogush; C. Bohm; V. Boldea; O. Borisov; M. Bosman; N. Bouhemaid; P. Brette; C. Bromberg; M. Brossard; J. Budagov; L. Caloba; J. Carvalho; P. Casado; M. Cavalli-Sforza; V. Cavasinni; R. Chadelas; J.-C Chevaleyre; I. Chirikov-Zorin; G. Chlachidze; M. Cobal; F. Cogswell; F. Colaço; S. Constantinescu; D. Costanzo; M. Crouau; F. Daudon; M. David; T. Davidek; J. Dawson; J.-J. Dugne; K. de; T Del Prete; A De Santo; B Di Girolamo; S. Dita; J. Dolejsi; Z. Dolezal; R. Downing; I. Efthymiopoulos; D. Errede; S. Errede; H. Evans; A. Ferrer; V. Flaminio; E. Gallas; M. Gaspar; O. Gildemeister; V. Glagolev; V. Golubev; A. Gomes; V. Grabsky; M. Haney; H. Hakopian; S. Hellman; A. Henriques; S. Holmgren; P. F Honoré; J. Huston; Yu. Ivanyushenkov; E. Johansson; A. Juste; S. Kakurin; G. Karapetian; A. Karyukhin; Yu. Khokhlov; V. Klyukhin; V. Kolomoets; S. Kopikov; M. Kostrikov; V. Kovtun; V. Kukhtin; M. Kulagin; Y. Kulchitsky; S. Lami; V. Lapin; C. Lazzeroni; A. Lebedev; R. Leitner; J. Li; I. Liba; Yu. Lomakin; O. Lomakina; M. Lokajicek; A. Maio; S. Malyukov; F. Marroquin; J. P Martins; E. Mazzoni; F. Merritt; B. Michel; R. Miller; I. Minashvili; Ll. Miralles; E. Mnatsakanian; G. Montarou; G. S Muanza; S. Nemecek; M. Nessi; A. Onofre; S. Orteu; C. Padilla; D. Pallin; D. Pantea; J. Patriarca; A. Pereira; J. A Perlas; J. Pilcher; J. Pinhão; L. Poggioli; S. Poirot; L. Price; Y. Protopopov; J. Proudfoot; O. Pukhov; G. Reinmuth; G. Renzoni; R. Richards; I. Riu; V. Romanov; B. Ronceux; V. Rumyantsev; N. Russakovich; H. Sanders; J. Santos; L. Sawyer; L.-P Says; J. M Seixas; B. Sellden; A. Semenov; V. Senchishin; A. Shchelchkov; V. Shevtsov; M. Schochet; V. Sidorov; V. Simaitis; A. Sissakian; A. Solodkov; P. Sonderegger; K. Soustruznik; R. Stanek; E. Starchenko; R. Stephens; S. Studenov; M. Suk; A. Surkov; F. Tang; S. Tardell; P. Tas; F. Teubert; J. Thaler; S. Tokar; N. Topilin; Z. Trka; A. Turcot; M. Turcotte; S. Valkar; M. J Varandas; A. Vartapetian; F. Vazeille; V. Vinogradov; S. Vorozhtsov; D. Wagner; A. White; H. Wolters; N. Yamdagni; G. Yarygin; C. Yosef; A. Zaitsev; M. Zdrazil

1997-01-01

23

Response of the ATLAS tile calorimeter prototype to muons  

Microsoft Academic Search

A study of high energy muons traversing the ATLAS hadron Tile calorimeter in the barrel region in the energy range between 10 and 300~GeV is presented. Both test beam experimental data and Monte Carlo simulations are given and show good agreement. The Tile calorimeter capability of detecting isolated muons over the above energy range is demonstrated. A signal to background

Ziad J Ajaltouni; F Albiol; A Alifanov; P Amaral; A Amorim; K J Anderson; C Angelini; A R Astvatsaturov; D Autiero; F Badaud; G Barreira; S R Berglund; G Blanchot; E Blucher; C Blaj; A A Bogush; C Bohm; V Boldea; O N Borisov; M Bosman; N Bouhemaid; P Brette; C Bromberg; M Brossard; Yu A Budagov; L P Calôba; J Carvalho; M P Casado; M Cavalli-Sforza; V Cavasinni; R Chadelas; J C Chevaleyre; I E Chirikov-Zorin; G Chlachidze; M Cobal; F Cogswell; F Colaço; S Constantinescu; D Costanzo; M Crouau; F Daudon; M David; T Davidek; J Dawson; J J Dugne; K De; T Del Prete; A De Santo; B Di Girolamo; S Dita; J Dolejsi; Z Dolezal; R Downing; I Efthymiopoulos; D Errede; S Errede; H Evans; A Ferrer; Vincenzo Flaminio; E J Gallas; M Gaspar; O Gildemeister; V V Glagolev; V B Golubev; A Gómez; V Grabskii; M Haney; H H Hakopian; S Hellman; A Henriques; S O Holmgren; P F Honoré; J Huston; Yu M Ivanyushenkov; E K Johansson; A Juste; S Kakurin; G V Karapetian; A N Karyukhin; Yu A Khokhlov; V I Klioukhine; V Kolomoets; S V Kopikov; M E Kostrikov; V E Kovtun; V V Kukhtin; M Kulagin; Yu A Kulchitskii; S Lami; V Lapin; C Lazzeroni; A Lebedev; R Leitner; J Li; I Liba; Yu F Lomakin; O V Lomakina; M Lokajícek; A Maio; S N Malyukov; F Marroquin; J P Martins; E Mazzoni; F S Merritt; B Michel; E Miller; I A Minashvili; L Miralles; E A Mnatzakanian; G Montarou; G S Muanza; S Némécek; Marzio Nessi; A Onofre; S Orteu; C Padilla; D Pallin; D Pantea; J Patriarca; A Pereira; J A Perlas; J E Pilcher; J Pinhão; Luc Poggioli; S Poirot; L Price; Yu Protopopov; J Proudfoot; O Pukhov; G Reinmuth; G Renzoni; R Richards; I Riu; V Romanov; B Ronceux; V Rumyantsev; N A Rusakovitch; H Sanders; J Santos; L Sawyer; L P Says; J M Seixas; B Selldén; A A Semenov; V G Senchyshyn; A S Shchelchkov; V P Shevtsov; M J Shochet; V Sidorov; V J Simaitis; A N Sissakian; A A Solodkov; P Sonderegger; K Soustruznik; R Stanek; E A Starchenko; R Stephens; S Studenov; M Suk; A Surkov; F Tang; S Tardell; P Tas; F Teubert; J J Thaler; S Tokár; N D Topilin; Z Trka; A S Turcot; M Turcotte; S Valkár; M J Varanda; A H Vartapetian; F Vazeille; V Vinogradov; S B Vorozhtsov; D Wagner; Alan R White; H Wolters; N Yamdagni; G Yarygin; C Yosef; A Zaitsev; M Zdrazil

1996-01-01

24

The optical instrumentation of the ATLAS Tile Calorimeter  

NASA Astrophysics Data System (ADS)

The Tile Calorimeter, covering the central region of the ATLAS experiment up to pseudorapidities of ±1.7, is a sampling device built with scintillating tiles that alternate with iron plates. The light is collected in wave-length shifting (WLS) fibers and is read out with photomultipliers. In the characteristic geometry of this calorimeter the tiles lie in planes perpendicular to the beams, resulting in a very simple and modular mechanical and optical layout. This paper focuses on the procedures applied in the optical instrumentation of the calorimeter, which involved the assembly of about 460,000 scintillator tiles and 550,000 WLS fibers. The outcome is a hadronic calorimeter that meets the ATLAS performance requirements, as shown in this paper.

Abdallah, J.; Adragna, P.; Alexa, C.; Alves, R.; Amaral, P.; Ananiev, A.; Anderson, K.; Andresen, X.; Antonaki, A.; Batusov, V.; Bednar, P.; Bergeaas, E.; Biscarat, C.; Blanch, O.; Blanchot, G.; Bohm, C.; Boldea, V.; Bosi, F.; Bosman, M.; Bromberg, C.; Budagov, J.; Calvet, D.; Cardeira, C.; Carli, T.; Carvalho, J.; Cascella, M.; Castillo, M. V.; Costelo, J.; Cavalli-Sforza, M.; Cavasinni, V.; Cerqueira, A. S.; Clement, C.; Cobal, M.; Cogswell, F.; Constantinescu, S.; Costanzo, D.; Da Silva, P.; David, M.; Davidek, T.; Dawson, J.; De, K.; Del Prete, T.; Diakov, E.; Di Girolamo, B.; Dita, S.; Dolejsi, J.; Dolezal, Z.; Dotti, A.; Downing, R.; Drake, G.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Farbin, A.; Fassouliotis, D.; Feng, E.; Fenyuk, A.; Ferdi, C.; Ferreira, B. C.; Ferrer, A.; Flaminio, V.; Flix, J.; Francavilla, P.; Fullana, E.; Garde, V.; Gellerstedt, K.; Giakoumopoulou, V.; Giangiobbe, V.; Gildemeister, O.; Gilewsky, V.; Giokaris, N.; Gollub, N.; Gomes, A.; Gonzalez, V.; Gouveia, J.; Grenier, P.; Gris, P.; Guarino, V.; Guicheney, C.; Gupta, A.; Hakobyan, H.; Haney, M.; Hellman, S.; Henriques, A.; Higon, E.; Hill, N.; Holmgren, S.; Hruska, I.; Hurwitz, M.; Huston, J.; Jen-La Plante, I.; Jon-And, K.; Junk, T.; Karyukhin, A.; Khubua, J.; Klereborn, J.; Konstantinov, V.; Kopikov, S.; Korolkov, I.; Krivkova, P.; Kulchitsky, Y.; Kurochkin, Yu; Kuzhir, P.; Lapin, V.; LeCompte, T.; Lefevre, R.; Leitner, R.; Li, J.; Liablin, M.; Lokajicek, M.; Lomakin, Y.; Lourtie, P.; Lovas, L.; Lupi, A.; Maidantchik, C.; Maio, A.; Maliukov, S.; Manousakis, A.; Marques, C.; Marroquim, F.; Martin, F.; Mazzoni, E.; Merritt, F.; Miagkov, A.; Miller, R.; Minashvili, I.; Miralles, L.; Montarou, G.; Nemecek, S.; Nessi, M.; Nikitine, I.; Nodulman, L.; Norniella, O.; Onofre, A.; Oreglia, M.; Palan, B.; Pallin, D.; Pantea, D.; Pereira, A.; Pilcher, J.; Pina, J.; Pinhao, J.; Pod, E.; Podlyski, F.; Portell, X.; Poveda, J.; Pribyl, L.; Price, L. E.; Proudfoot, J.; Ramalho, M.; Ramstedt, M.; Raposeiro, L.; Reis, J.; Richards, R.; Roda, C.; Romanov, V.; Rosnet, P.; Roy, P.; Ruiz, A.; Rumiantsau, V.; Russakovich, N.; da Costa, J. Sa; Saltó, O.; Salvachua, B.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Saraiva, J. G.; Sarri, F.; Says, L.-P.; Schlager, G.; Schlereth, J.; Seixas, J. M.; Sellden, B.; Shalanda, N.; Shevtsov, P.; Shochet, M.; Silva, J.; Simaitis, V.; Simonyan, M.; Sissakian, A.; Sjoelin, J.; Solans, C.; Solodkov, A.; Solovianov, O.; Sosebee, M.; Spanò, F.; Speckmeyer, P.; Stanek, R.; Starchenko, E.; Starovoitov, P.; Suk, M.; Sykora, I.; Tang, F.; Tas, P.; Teuscher, R.; Tischenko, M.; Tokar, S.; Topilin, N.; Torres, J.; Underwood, D.; Usai, G.; Valero, A.; Valkar, S.; Valls, J. A.; Vartapetian, A.; Vazeille, F.; Vellidis, C.; Ventura, F.; Vichou, I.; Vivarelli, I.; Volpi, M.; White, A.; Zaitsev, A.; Zaytsev, Yu; Zenin, A.; Zenis, T.; Zenonos, Z.; Zenz, S.; Zilka, B.

2013-01-01

25

Mechanical construction and installation of the ATLAS tile calorimeter  

NASA Astrophysics Data System (ADS)

This paper summarises the mechanical construction and installation of the Tile Calorimeter for the ATLAS experiment at the Large Hadron Collider in CERN, Switzerland. The Tile Calorimeter is a sampling calorimeter using scintillator as the sensitive detector and steel as the absorber and covers the central region of the ATLAS experiment up to pseudorapidities ±1.7. The mechanical construction of the Tile Calorimeter occurred over a period of about 10 years beginning in 1995 with the completion of the Technical Design Report and ending in 2006 with the installation of the final module in the ATLAS cavern. During this period approximately 2600 metric tons of steel were transformed into a laminated structure to form the absorber of the sampling calorimeter. Following instrumentation and testing, which is described elsewhere, the modules were installed in the ATLAS cavern with a remarkable accuracy for a structure of this size and weight.

Abdallah, J.; Adragna, P.; Alexa, C.; Alves, R.; Amaral, P.; Ananiev, A.; Anderson, K.; Andresen, X.; Antonaki, A.; Batusov, V.; Bednar, P.; Behrens, A.; Bergeaas, E.; Biscarat, C.; Blanch, O.; Blanchot, G.; Blocki, J.; Bohm, C.; Boldea, V.; Bosi, F.; Bosman, M.; Bromberg, C.; Brunel, B.; Budagov, J.; Calderón, D.; Calvet, D.; Cardeira, C.; Carli, T.; Carvalho, J.; Cascella, M.; Castillo, M. V.; Costello, J.; Cavalli-Sforza, M.; Cavasinni, V.; Cerqueira, A. S.; Clement, C.; Cobal, M.; Cogswell, F.; Constantinescu, S.; Costanzo, D.; Da Silva, P.; David, M.; Davidek, T.; Dawson, J.; De, K.; Del Prete, T.; Di Girolamo, B.; Dita, S.; Dolejsi, J.; Dolezal, Z.; Dotti, A.; Downing, R.; Drake, G.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Farbin, A.; Fassouliotis, D.; Feng, E.; Fenyuk, A.; Ferdi, C.; Ferreira, B. C.; Ferrer, A.; Ferrer, J.; Flaminio, V.; Flix, J.; Francavilla, P.; Fullana, E.; Garde, V.; Gayde, J. C.; Gellerstedt, K.; Giakoumopoulou, V.; Giangiobbe, V.; Gildemeister, O.; Gilewsky, V.; Giokaris, N.; Gollub, N.; Gomes, A.; Gonzalez, V.; Gouveia, J.; Grenier, P.; Gris, P.; Grudzinski, J.; Guarino, V.; Guicheney, C.; Gupta, A.; Hakobyan, H.; Haney, M.; Hellman, S.; Henriques, A.; Higon, E.; Hill, N.; Holmgren, S.; Hruska, I.; Hurwitz, M.; Huston, J.; Jen-La Plante, I.; Jon-And, K.; Junk, T.; Karyukhin, A.; Khubua, J.; Klereborn, J.; Kopikov, S.; Korolkov, I.; Krivkova, P.; Kulchitsky, Y.; Kurochkin, Y.; Kuzhir, P.; Lapin, V.; Lasseur, C.; LeCompte, T.; Lefevre, R.; Leitner, R.; Li, J.; Lyablin, M.; Lim, H.; Lokajicek, M.; Lomakin, Y.; Lourtie, P.; Lovas, L.; Lupi, A.; Maidantchik, C.; Maio, A.; Maliukov, S.; Manousakis, A.; Marques, C.; Marroquim, F.; Martin, F.; Mazzoni, E.; Mergelkuhl, D.; Merritt, F.; Miagkov, A.; Miller, R.; Minashvili, I.; Miralles, L.; Montarou, G.; Nemecek, S.; Nessi, M.; Nikitine, I.; Nodulman, L.; Norniella, O.; Nyman, T.; Onofre, A.; Oreglia, M.; Palan, B.; Pallin, D.; Pantea, D.; Pereira, A.; Pilcher, J.; Pina, J.; Pinhão, J.; Pod, E.; Podlyski, F.; Portell, X.; Poveda, J.; Pribyl, L.; Price, L. E.; Proudfoot, J.; Ramalho, M.; Ramstedt, M.; Raposeiro, L.; Reis, J.; Richards, R.; Roda, C.; Romanov, V.; Rose-Dulcina, L.; Rosnet, P.; Roy, P.; Ruiz, A.; Rumiantsau, V.; Russakovich, N.; da Costa, J. Sa; Salto, O.; Salvachua, B.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Saraiva, J. G.; Sarri, F.; Says, L.-P.; Schlager, G.; Schlereth, J.; Seixas, J. M.; Selldèn, B.; Shalanda, N.; Shchelchkov, A.; Shevtsov, P.; Shochet, M.; Silva, J.; Simaitis, V.; Simonyan, M.; Sissakian, A.; Sjoelin, J.; Skrzecz, F.; Solans, C.; Solodkov, A.; Solovianov, O.; Sorokina, J.; Sosebee, M.; Spano, F.; Speckmeyer, P.; Stanek, R.; Starchenko, E.; Starovoitov, P.; Suk, M.; Sykora, I.; Tang, F.; Tas, P.; Teuscher, R.; Tokar, S.; Topilin, N.; Torres, J.; Underwood, D.; Usai, G.; Utkin, V.; Valero, A.; Valkar, S.; Valls, J. A.; Vartapetian, A.; Vazeille, F.; Vellidis, C.; Ventura, F.; Vichou, I.; Vivarelli, I.; Volpi, M.; White, A.; Wood, K.; Zaitsev, A.; Zenin, A.; Zenis, T.; Zenonos, Z.; Zenz, S.; Zilka, B.

2013-11-01

26

Hadronic shower development in Iron-Scintillator Tile Calorimetry  

Microsoft Academic Search

The lateral and longitudinal profiles of hadronic showers detected by a prototype of the ATLAS Iron-Scintillator Tile Hadron Calorimeter have been investigated. This calorimeter presents a unique longitudinal configuration of scintillator tiles. Using a fine-grained pion beam scan at 100GeV, a detailed picture of transverse shower behaviour is obtained. The underlying radial energy densities for the four depth segments and

P. Amaral; A. Amorim; K. Anderson; G. Barreira; R. Benetta; S. Berglund; C. Biscarat; G. Blanchot; E. Blucher; A A Bogush; C. Bohm; V. Boldea; O. Borisov; M. Bosman; C. Bromberg; J. Budagov; S. Burdin; L. Caloba; J. Carvalho; P. Casado; M. V. Castillo; M. Cavalli-Sforza; V. Cavasinni; R. Chadelas; I E Chirikov-Zorin; G. Chlachidze; M. Cobal; F. Cogswell; F. Colaço; S. Cologna; S. Constantinescu; D. Costanzo; M. Crouau; F. Daudon; J. David; M. David; T. Davidek; J. Dawson; K. De; T. Del Prete; A. De Santo; B. Di Girolamo; S. Dita; J. Dolejsi; Z. Dolezal; R. Downing; I. Efthymiopoulos; M. Engström; D. Errede; S. Errede; H. Evans; A. Fenyuk; A. Ferrer; V. Flaminio; E. Gallas; M. Gaspar; I. Gil; O. Gildemeister; V. Glagolev; A. Gomes; V. Gonzalez; S. González De La Hoz; V Grabskii; E Graugès-Pous; P. Grenier; H H Hakopian; M. Haney; M. Hansen; S. Hellman; A. Henriques; C. Hebrard; E. Higon; S O Holmgren; J. Huston; Yu M Ivanyushenkov; A. Juste; S. Kakurin; G V Karapetian; A N Karyukhin; S. Kopikov; V. Kukhtin; Y. Kulchitsky; W. Kurzbauer; M. Kuzmin; S. Lami; V. Lapin; C. Lazzeroni; A. Lebedev; R. Leitner; J. Li; Yu F Lomakin; O V Lomakina; M. Lokajicek; J. M. Lopez Amengual; A. Maio; S. Malyukov; F. Marroquin; J. P. Martins; E. Mazzoni; F S Merritt; R. Miller; I A Minashvili; Ll. Miralles; G. Montarou; A. Munar; S. Nemecek; Marzio Nessi; A. Onofre; S. Orteu; I. C. Park; D. Pallin; D. Pantea; R. Paoletti; J. Patriarca; A. Pereira; J. A. Perlas; P. Petit; J E Pilcher; L. Poggioli; L. Price; J. Proudfoot; O. Pukhov; G. Reinmuth; G. Renzoni; R. Richards; C. Roda; J. B. Romance; V. Romanov; B. Ronceux; P. Rosnet; V. Rumyantsev; N. Russakovich; E. Sanchis; H. Sanders; C. Santoni; J. Santos; L. Sawyer; L.-P. Says; J. M. Seixas; B. Selldèn; A. Semenov; A S Shchelchkov; M. Shochet; V. Simaitis; A N Sissakian; A. Solodkov; O. Solovianov; P. Sonderegger; M. Sosebee; K. Soustruznik; F. Spanó; R. Stanek; E A Starchenko; R. Stephens; M. Suk; F. Tang; P. Tas; J. Thaler; S. Tokar; N. Topilin; Z. Trka; A S Turcot; M. Turcotte; S. Valkar; M. J. Varandas; A H Vartapetian; F. Vazeille; I. Vichou; V. Vinogradov; S B Vorozhtsov; D. Wagner; A. White; H. Wolters; N. Yamdagni; G. Yarygin; C. Yosef; A. Zaitsev; M. Zdrazil

2000-01-01

27

Testbeam studies of production modules of the ATLAS Tile Calorimeter  

Microsoft Academic Search

We report test beam studies of 11% of the production ATLAS Tile Calorimeter modules. The modules were equipped with production front-end electronics and all the calibration systems planned for the final detector. The studies used muon, electron and hadron beams ranging in energy from 3 to 350GeV.Two independent studies showed that the light yield of the calorimeter was ?70pe\\/GeV, exceeding

P. Adragna; C. Alexa; K. Anderson; A. Antonaki; A. Arabidze; L. Batkova; V. Batusov; H. P. Beck; P. Bednar; E. Bergeaas Kuutmann; C. Biscarat; G. Blanchot; A. Bogush; C. Bohm; V. Boldea; M. Bosman; C. Bromberg; J. Budagov; D. Burckhart-Chromek; M. Caprini; L. Caloba; D. Calvet; T. Carli; J. Carvalho; M. Cascella; J. Castelo; M. V. Castillo; M. Cavalli-Sforza; V. Cavasinni; A. S. Cerqueira; C. Clement; M. Cobal; F. Cogswell; S. Constantinescu; D. Costanzo; A. Corso-Radu; C. Cuenca; D. O. Damazio; M. David; T. Davidek; K. de; T. Del Prete; B. Di Girolamo; S. Dita; T. Djobava; M. Dobson; J. Dolejsi; Z. Dolezal; A. Dotti; R. Downing; I. Efthymiopoulos; D. Eriksson; D. Errede; S. Errede; A. Farbin; D. Fassouliotis; R. Febbraro; I. Fedorko; A. Fenyuk; C. Ferdi; A. Ferrer; V. Flaminio; D. Francis; E. Fullana; S. Gadomski; S. Gameiro; V. Garde; K. Gellerstedt; V. Giakoumopoulou; O. Gildemeister; V. Gilewsky; N. Giokaris; N. Gollub; A. Gomes; V. Gonzalez; B. Gorini; P. Grenier; P. Gris; M. Gruwe; V. Guarino; C. Guicheney; A. Gupta; C. Haeberli; H. Hakobyan; M. Haney; S. Hellman; A. Henriques; E. Higon; S. Holmgren; M. Hurwitz; J. Huston; C. Iglesias; A. Isaev; I. Jen-La Plante; M. Joos; T. Junk; A. Karyukhin; A. Kazarov; H. Khandanyan; J. Khramov; J. Khubua; S. Kolos; I. Korolkov; P. Krivkova; Y. Kulchitsky; Yu Kurochkin; P. Kuzhir; T. Le Compte; R. Lefevre; G. Lehmann; R. Leitner; M. Lembesi; J. Lesser; J. Li; M. Liablin; M. Lokajicek; Y. Lomakin; A. Lupi; C. Maidanchik; A. Maio; M. Makouski; S. Maliukov; A. Manousakis; L. Mapelli; C. Marques; F. Marroquim; F. Martin; E. Mazzoni; F. Merritt; A. Miagkov; R. Miller; I. Minashvili; L. Miralles; G. Montarou; M. Mosidze; A. Myagkov; S. Nemecek; M. Nessi; L. Nodulman; B. Nordkvist; O. Norniella; A. Onofre; M. Oreglia; D. Pallin; D. Pantea; J. Petersen; J. Pilcher; J. Pina; J. Pinhão; F. Podlyski; X. Portell; J. Poveda; L. Pribyl; L. E. Price; J. Proudfoot; M. Ramstedt; R. Richards; C. Roda; V. Romanov; P. Rosnet; P. Roy; A. Ruiz; V. Rumiantsev; N. Russakovich; O. Saltó; B. Salvachua; E. Sanchis; H. Sanders; C. Santoni; J. Santos; J. G. Saraiva; F. Sarri; I. Satsunkevitch; L.-P. Says; G. Schlager; J. Schlereth; J. M. Seixas; B. Selldèn; N. Shalanda; P. Shevtsov; M. Shochet; J. Silva; P. Da Silva; V. Simaitis; M. Simonyan; A. Sissakian; J. Sjölin; C. Solans; A. Solodkov; I. Soloviev; O. Solovyanov; M. Sosebee; F. Spanò; R. Stanek; E. Starchenko; P. Starovoitov; P. Stavina; M. Suk; I. Sykora; F. Tang; P. Tas; R. Teuscher; S. Tokar; N. Topilin; J. Torres; L. Tremblet; P. Tsiareshka; M. Tylmad; D. Underwood; G. Unel; G. Usai; A. Valero; S. Valkar; J. A. Valls; A. Vartapetian; F. Vazeille; I. Vichou; V. Vinogradov; I. Vivarelli; M. Volpi; A. White; A. Zaitsev; A. Zenine; T. Zenis

2009-01-01

28

Hadronic Shower Development in Iron-Scintillator Tile Calorimetry  

E-print Network

The lateral and longitudinal profiles of hadronic showers detected by a prototype of the ATLAS Iron-Scintillator Tile Hadron Calorimeter have been investigated. This calorimeter uses a unique longitudinal configuration of scintillator tiles. Using a fine-grained pion beam scan at 100 GeV, a detailed picture of transverse shower behavior is obtained. The underlying radial energy densities for four depth segments and for the entire calorimeter have been reconstructed. A three-dimensional hadronic shower parametrization has been developed. The results presented here are useful for understanding the performance of iron-scintillator calorimeters, for developing fast simulations of hadronic showers, for many calorimetry problems requiring the integration of a shower energy deposition in a volume and for future calorimeter design.

Tilecal Atlas Collaboration

1999-04-29

29

Hadronic Shower Development in Tile Iron-Scintillator Calorimetry  

E-print Network

The lateral and longitudinal profiles of hadronic showers detected by a prototype of the ATLAS Iron-Scintillator Tile Hadron Calorimeter have been investigated. This calorimeter uses a unique longitudinal configuration of scintillator tiles. Using a fine-grained pion beam scan at 100 GeV, a detailed picture of transverse shower behavior is obtained. The underlying radial energy densities for four depth segments and for the entire calorimeter have been reconstructed. A three-dimensional hadronic shower parametrization has been developed. The results presented here are useful for understanding the performance of iron-scintillator calorimeters, for developing fast simulations of hadronic showers, for many calorimetry problems requiring the integration of a shower energy deposition in a volume and for future calorimeter design.

Yuri A. Kulchitsky

1999-10-07

30

Hadronic shower development in Iron-Scintillator Tile Calorimetry  

NASA Astrophysics Data System (ADS)

The lateral and longitudinal profiles of hadronic showers detected by a prototype of the ATLAS Iron-Scintillator Tile Hadron Calorimeter have been investigated. This calorimeter presents a unique longitudinal configuration of scintillator tiles. Using a fine-grained pion beam scan at 100 GeV, a detailed picture of transverse shower behaviour is obtained. The underlying radial energy densities for the four depth segments and for the entire calorimeter have been reconstructed. A three-dimensional hadronic shower parametrisation has been developed. The results presented here are useful for understanding the performance of iron-scintillator calorimeters, for developing fast simulations of hadronic showers, for many calorimetry problems requiring the integration of a shower energy deposition in a volume and for future calorimeters design.

Amaral, P.; Amorim, A.; Anderson, K.; Barreira, G.; Benetta, R.; Berglund, S.; Biscarat, C.; Blanchot, G.; Blucher, E.; Bogush, A.; Bohm, C.; Boldea, V.; Borisov, O.; Bosman, M.; Bromberg, C.; Budagov, J.; Burdin, S.; Caloba, L.; Carvalho, J.; Casado, P.; Castillo, M. V.; Cavalli-Sforza, M.; Cavasinni, V.; Chadelas, R.; Chirikov-Zorin, I.; Chlachidze, G.; Cobal, M.; Cogswell, F.; Colaço, F.; Cologna, S.; Constantinescu, S.; Costanzo, D.; Crouau, M.; Daudon, F.; David, J.; David, M.; Davidek, T.; Dawson, J.; De, K.; Del Prete, T.; De Santo, A.; Di Girolamo, B.; Dita, S.; Dolejsi, J.; Dolezal, Z.; Downing, R.; Efthymiopoulos, I.; Engström, M.; Errede, D.; Errede, S.; Evans, H.; Fenyuk, A.; Ferrer, A.; Flaminio, V.; Gallas, E.; Gaspar, M.; Gil, I.; Gildemeister, O.; Glagolev, V.; Gomes, A.; Gonzalez, V.; González De La Hoz, S.; Grabski, V.; Grauges, E.; Grenier, P.; Hakopian, H.; Haney, M.; Hansen, M.; Hellman, S.; Henriques, A.; Hebrard, C.; Higon, E.; Holmgren, S.; Huston, J.; Ivanyushenkov, Yu.; Jon-And, K.; Juste, A.; Kakurin, S.; Karapetian, G.; Karyukhin, A.; Kopikov, S.; Kukhtin, V.; Kulchitsky, Y.; Kurzbauer, W.; Kuzmin, M.; Lami, S.; Lapin, V.; Lazzeroni, C.; Lebedev, A.; Leitner, R.; Li, J.; Lomakin, Yu.; Lomakina, O.; Lokajicek, M.; Lopez Amengual, J. M.; Maio, A.; Malyukov, S.; Marroquin, F.; Martins, J. P.; Mazzoni, E.; Merritt, F.; Miller, R.; Minashvili, I.; Miralles, Ll.; Montarou, G.; Munar, A.; Nemecek, S.; Nessi, M.; Onofre, A.; Orteu, S.; Park, I. C.; Pallin, D.; Pantea, D.; Paoletti, R.; Patriarca, J.; Pereira, A.; Perlas, J. A.; Petit, P.; Pilcher, J.; Pinhão, J.; Poggioli, L.; Price, L.; Proudfoot, J.; Pukhov, O.; Reinmuth, G.; Renzoni, G.; Richards, R.; Roda, C.; Romance, J. B.; Romanov, V.; Ronceux, B.; Rosnet, P.; Rumyantsev, V.; Russakovich, N.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Sawyer, L.; Says, L.-P.; Seixas, J. M.; Selldèn, B.; Semenov, A.; Shchelchkov, A.; Shochet, M.; Simaitis, V.; Sissakian, A.; Solodkov, A.; Solovianov, O.; Sonderegger, P.; Sosebee, M.; Soustruznik, K.; Spanó, F.; Stanek, R.; Starchenko, E.; Stephens, R.; Suk, M.; Tang, F.; Tas, P.; Thaler, J.; Tokar, S.; Topilin, N.; Trka, Z.; Turcot, A.; Turcotte, M.; Valkar, S.; Varandas, M. J.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vinogradov, V.; Vorozhtsov, S.; Wagner, D.; White, A.; Wolters, H.; Yamdagni, N.; Yarygin, G.; Yosef, C.; Zaitsev, A.; Zdrazil, M.; Zuñiga, J.

2000-03-01

31

Simulation and validation of the ATLAS Tile Calorimeter response  

NASA Astrophysics Data System (ADS)

The Tile Calorimeter is the central section of the ATLAS hadronic calorimeter at the Large Hadron Collider. Scintillation light produced in the tiles is transmitted by wavelength shifting fibers to photomultiplier tubes (PMTs). The resulting electronic signals from approximately 10000 PMTs are amplified, shaped and digitized before being transferred to off-detector data acquisition systems. This paper describes the detailed simulation of this large scale calorimeter from the implementation of the geometrical elements down to the realistic description of the electronics readout pulses, the special noise treatment and the signal reconstruction. Recently improved description of the optical and electronic signal propagation is highlighted and the validation with the real particle data is presented.

Karpov, S. N.

2014-09-01

32

Hadron calorimeters for future hadron colliders  

SciTech Connect

Hadron calorimeters are essential for jet and neutrino physics at collider experiments. Current hadron calorimeters for the ATLAS and CMS detectors are described. Increased energy and luminosity of future hadron colliders place constraints on detector technology. Difficulties for operation of the current detectors in future hadron collider environments are discussed. New experiments for future colliders should take notice of physics processes during jet evolution that place fundamental limits on performance of the calorimeter to reconstruct jets. A technique of incorporating tracking information to improve jet resolution is described. Future detectors should be designed with these constraints in mind. Possible avenues of exploration for future technology are described.

Jim Freeman

2004-01-27

33

Testbeam studies of production modules of the ATLAS Tile Calorimeter  

NASA Astrophysics Data System (ADS)

We report test beam studies of 11% of the production ATLAS Tile Calorimeter modules. The modules were equipped with production front-end electronics and all the calibration systems planned for the final detector. The studies used muon, electron and hadron beams ranging in energy from 3 to 350 GeV. Two independent studies showed that the light yield of the calorimeter was ?70 pe/GeV, exceeding the design goal by 40%. Electron beams provided a calibration of the modules at the electromagnetic energy scale. Over 200 calorimeter cells the variation of the response was 2.4%. The linearity with energy was also measured. Muon beams provided an intercalibration of the response of all calorimeter cells. The response to muons entering in the ATLAS projective geometry showed an RMS variation of 2.5% for 91 measurements over a range of rapidities and modules. The mean response to hadrons of fixed energy had an RMS variation of 1.4% for the modules and projective angles studied. The response to hadrons normalized to incident beam energy showed an 8% increase between 10 and 350 GeV, fully consistent with expectations for a noncompensating calorimeter. The measured energy resolution for hadrons of ?/E=52.9%/?{E}?5.7% was also consistent with expectations. Other auxiliary studies were made of saturation recovery of the readout system, the time resolution of the calorimeter and the performance of the trigger signals from the calorimeter.

Adragna, P.; Alexa, C.; Anderson, K.; Antonaki, A.; Arabidze, A.; Batkova, L.; Batusov, V.; Beck, H. P.; Bednar, P.; Bergeaas Kuutmann, E.; Biscarat, C.; Blanchot, G.; Bogush, A.; Bohm, C.; Boldea, V.; Bosman, M.; Bromberg, C.; Budagov, J.; Burckhart-Chromek, D.; Caprini, M.; Caloba, L.; Calvet, D.; Carli, T.; Carvalho, J.; Cascella, M.; Castelo, J.; Castillo, M. V.; Cavalli-Sforza, M.; Cavasinni, V.; Cerqueira, A. S.; Clement, C.; Cobal, M.; Cogswell, F.; Constantinescu, S.; Costanzo, D.; Corso-Radu, A.; Cuenca, C.; Damazio, D. O.; David, M.; Davidek, T.; De, K.; Del Prete, T.; Di Girolamo, B.; Dita, S.; Djobava, T.; Dobson, M.; Dolejsi, J.; Dolezal, Z.; Dotti, A.; Downing, R.; Efthymiopoulos, I.; Eriksson, D.; Errede, D.; Errede, S.; Farbin, A.; Fassouliotis, D.; Febbraro, R.; Fedorko, I.; Fenyuk, A.; Ferdi, C.; Ferrer, A.; Flaminio, V.; Francis, D.; Fullana, E.; Gadomski, S.; Gameiro, S.; Garde, V.; Gellerstedt, K.; Giakoumopoulou, V.; Gildemeister, O.; Gilewsky, V.; Giokaris, N.; Gollub, N.; Gomes, A.; Gonzalez, V.; Gorini, B.; Grenier, P.; Gris, P.; Gruwe, M.; Guarino, V.; Guicheney, C.; Gupta, A.; Haeberli, C.; Hakobyan, H.; Haney, M.; Hellman, S.; Henriques, A.; Higon, E.; Holmgren, S.; Hurwitz, M.; Huston, J.; Iglesias, C.; Isaev, A.; Jen-La Plante, I.; Jon-And, K.; Joos, M.; Junk, T.; Karyukhin, A.; Kazarov, A.; Khandanyan, H.; Khramov, J.; Khubua, J.; Kolos, S.; Korolkov, I.; Krivkova, P.; Kulchitsky, Y.; Kurochkin, Yu; Kuzhir, P.; Le Compte, T.; Lefevre, R.; Lehmann, G.; Leitner, R.; Lembesi, M.; Lesser, J.; Li, J.; Liablin, M.; Lokajicek, M.; Lomakin, Y.; Lupi, A.; Maidanchik, C.; Maio, A.; Makouski, M.; Maliukov, S.; Manousakis, A.; Mapelli, L.; Marques, C.; Marroquim, F.; Martin, F.; Mazzoni, E.; Merritt, F.; Miagkov, A.; Miller, R.; Minashvili, I.; Miralles, L.; Montarou, G.; Mosidze, M.; Myagkov, A.; Nemecek, S.; Nessi, M.; Nodulman, L.; Nordkvist, B.; Norniella, O.; Onofre, A.; Oreglia, M.; Pallin, D.; Pantea, D.; Petersen, J.; Pilcher, J.; Pina, J.; Pinhão, J.; Podlyski, F.; Portell, X.; Poveda, J.; Pribyl, L.; Price, L. E.; Proudfoot, J.; Ramstedt, M.; Richards, R.; Roda, C.; Romanov, V.; Rosnet, P.; Roy, P.; Ruiz, A.; Rumiantsev, V.; Russakovich, N.; Saltó, O.; Salvachua, B.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Saraiva, J. G.; Sarri, F.; Satsunkevitch, I.; Says, L.-P.; Schlager, G.; Schlereth, J.; Seixas, J. M.; Selldèn, B.; Shalanda, N.; Shevtsov, P.; Shochet, M.; Silva, J.; Da Silva, P.; Simaitis, V.; Simonyan, M.; Sissakian, A.; Sjölin, J.; Solans, C.; Solodkov, A.; Soloviev, I.; Solovyanov, O.; Sosebee, M.; Spanò, F.; Stanek, R.; Starchenko, E.; Starovoitov, P.; Stavina, P.; Suk, M.; Sykora, I.; Tang, F.; Tas, P.; Teuscher, R.; Tokar, S.; Topilin, N.; Torres, J.; Tremblet, L.; Tsiareshka, P.; Tylmad, M.; Underwood, D.; Unel, G.; Usai, G.; Valero, A.; Valkar, S.; Valls, J. A.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vinogradov, V.; Vivarelli, I.; Volpi, M.; White, A.; Zaitsev, A.; Zenine, A.; Zenis, T.

2009-07-01

34

The DELPHI small angle tile calorimeter  

Microsoft Academic Search

The small angle tile Calorimeter (STIC) provides calorimetric coverage in the very forward region for the DELPHI experiment at the CERN LEP collider. A veto system composed of two scintillator layers allows one to trigger on single photon events and provides e-? separation. We present here some results of extensive measurements performed on part of the calorimeter and the veto

S. J. Alvsvaag; O. A. Maeland; A. Klovning; A. C. Benvenuti; I. Giordano; M. Guerzoni; F. L. Navarria; M. G. Verardi; T. Camporesi; E. Vallazza; M. Bozzo; R. Cereseto; G. Barreira; M. C. Espirito Santo; A. Maio; A. Onofre; L. Peralta; M. Pimenta; B. Tome; H. Carling; E. Falk; V. Hedberg; G. Jarlskog; I. Kronkvist; M. Bonesini; P. Ferrari; B. Chignoli; S. Gumenyuk; R. Leoni; R. Mazza; P. Negri; L. Paganoni; F. Petrovykh; D. R. Dharmasiri; B. Nossum; A. L. Read; B. Skaali; L. Castellani; M. Pegoraro; A. Fenyuk; Yu. Gouz; Yu. Ivanyushenkov; A. Karyukhin; V. Obraztov; E. Vlasov; A. Zaitsev; M. Bigi; V. Cassio; D. Gamba; E. Migliore; A. Romero; L. Simonetti; E. Torassa; P. P. Trapani; M. Bari; G. Della Ricca; L. Lanceri; P. Poropat; M. Prest

1995-01-01

35

Pulse shapes for signal reconstruction in the ATLAS Tile Calorimeter  

NASA Astrophysics Data System (ADS)

The ATLAS detector will record proton-proton collisions produced in the Large Hadron Collider at center of mass energies of up to 14 TeV. Its design allows for precision measurements as well as searches for new physics. Energy measurement using the calorimeters is crucial to these efforts. Studies of the pulse shapes used for signal reconstruction in the Tile Calorimeter are presented. The shapes were measured using test beam data and found to vary slightly with signal size. The impact of this variation on the reconstructed energy has been determined using a toy Monte Carlo.

Jen-La Plante, Imai; Tylmad, Maja

2010-05-01

36

The CMS central hadron calorimeter  

SciTech Connect

The CMS central hadron calorimeter is a brass absorber/scintillator sampling structure. We describe details of the mechanical and optical structure. We also discuss calibration techniques, and finally the anticipated construction schedule.

Freeman, Jim [Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)

1998-11-09

37

LED Calibration Systems for CALICE Hadron Calorimeter  

NASA Astrophysics Data System (ADS)

This paper presents several versions of the calibration and monitoring system for the scintillator tile hadron calorimeter for the ILC. The first Calibration and Monitoring Board (CMB) is used to calibrate all 7608 SiPMs of a 1 m3 hadron calorimeter prototype. Each CMB has 12 LEDs and each LED illuminates 18 tiles with SiPMs through 18 optical fibers. The pulse is 10 ns wide and delivers a signal equivalent to 70 MIPs to each SiPM. The new AHCAL engineering prototype offers both embedded LED driver (1 LED per 1 tile) and an external calibration board (1 LED per many tiles, up to 72). The embedded LED driver circuit was tuned for shorter pulses and produce nice single photo-electron spectrum and can also saturate the SiPM. A newer version of external calibrating system uses sinusoidal signal generated by a Quasi-Resonant LED driver. The system generates ˜3.5 ns optical pulse with high intensity (0.4 nJ) and low EM noise. The QRLED driver with a special notched optical fibre can saturate 12 SiPMs at once with a signal up to 200 MIPs per tile. Next version will be improved to generate longer pulses (˜5 ns), therefore a higher light intensity. Our development includes an optical distribution through a notched fibre, which shines equally from 12, 24 or 72 points. The light in the final AHCAL prototype will be routed from single LED by 3 fibers having 24 notches each, illuminating row of 72 tiles at once.

Kvasnicka, Jiri; Polak, Ivo; On Behalf Of Calice Collaboration

38

Irradiation effect on the response of the scintillators in the ATLAS Tile Calorimeter  

E-print Network

The Tile Calorimeter (TileCal) is the central hadronic calorimeter of the ATLAS experiment at the LHC. Together with other calorimeters, it provides precise measurements of hadrons, jets, taus and missing transverse energy. The monitoring and equalisation of the calorimeter response at each stage of the signal development is allowed by a movable 137Cs radioactive source, a laser calibration system and a charge injection system. Moreover, during the LHC data taking, an integrator based readout provides the signals coming from inelastic proton-proton collisions at low momentum transfer (minimum bias currents) and allows to monitor the instantaneous ATLAS luminosity as well as the response of calorimeter cells. Minimum bias currents have been used to detect and quantify the e ffect of TileCal scintillators irradiation using the data taken during 2012 that corresponds to about 21 fb-1 of integrated luminosity. Moreover, the response variation for an irradiated cell has been studied combining the information from ...

Fracchia, S; The ATLAS collaboration

2014-01-01

39

Response of the ATLAS Tile calorimeter prototype to muons  

NASA Astrophysics Data System (ADS)

A study of high energy muons traversing the ATLAS hadron Tile calorimeter in the barrel region in the energy range between 10 and 300 GeV is presented. Both test beam experimental data and Monte Carlo simulations are given and show good agreement. The Tile calorimeter capability of detecting isolated muons over the above energy range is demonstrated. A signal to background ratio of about 10 is expected for the nominal LHC luminosity (10 34 1/cm 2 s). The photoelectron statistics effect in the muon shape response is shown. The {e}/{mip} ratio is found to be 0.81±0.03; the {e}/{?} ratio is in the range 0.91-0.97. The energy loss of a muon in the calorimeter, dominated by the energy lost in the absorber, can be correlated to the energy loss in the active material. This correlation allows one to correct on an event by event basis the muon energy loss in the calorimeter and therefore reduce the low energy tails in the muon momentum distribution.

Ajaltouni, Z.; Albiol, F.; Alifanov, A.; Amaral, P.; Amorim, A.; Anderson, K.; Angelini, C.; Astvatsaturov, A.; Autiero, D.; Badaud, F.; Barreira, G.; Berglund, S.; Blanchot, G.; Blucher, E.; Blaj, C.; Bogush, A.; Bohm, C.; Boldea, V.; Borisov, O.; Bosman, M.; Bouhemaid, N.; Brette, P.; Bromberg, C.; Brossard, M.; Budagov, J.; Caloba, L.; Carvalho, J.; Casado, P.; Cavalli-Sforza, M.; Cavasinni, V.; Chadelas, R.; Chevaleyre, J.-C.; Chirikov-Zorin, I.; Chlachidze, G.; Cobal, M.; Cogswell, F.; Colaço, F.; Constantinescu, S.; Costanzo, D.; Crouau, M.; Daudon, F.; David, M.; Davidek, T.; Dawson, J.; Dugne, J.-J.; de, K.; del Prete, T.; de Santo, A.; di Girolamo, B.; Dita, S.; Dolejsi, J.; Dolezal, Z.; Downing, R.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Evans, H.; Ferrer, A.; Flaminio, V.; Gallas, E.; Gaspar, M.; Gildemeister, O.; Glagolev, V.; Golubev, V.; Gomes, A.; Grabsky, V.; Haney, M.; Hakopian, H.; Hellman, S.; Henriques, A.; Holmgren, S.; Honoré, P. F.; Huston, J.; Ivanyushenkov, Yu.; Johansson, E.; Jon-And, K.; Juste, A.; Kakurin, S.; Karapetian, G.; Karyukhin, A.; Khokhlov, Yu.; Klyukhin, V.; Kolomoets, V.; Kopikov, S.; Kostrikov, M.; Kovtun, V.; Kukhtin, V.; Kulagin, M.; Kulchitsky, Y.; Lami, S.; Lapin, V.; Lazzeroni, C.; Lebedev, A.; Leitner, R.; Li, J.; Liba, I.; Lomakin, Yu.; Lomakina, O.; Lokajicek, M.; Maio, A.; Malyukov, S.; Marroquin, F.; Martins, J. P.; Mazzoni, E.; Merritt, F.; Michel, B.; Miller, R.; Minashvili, I.; Miralles, Ll.; Mnatsakanian, E.; Montarou, G.; Muanza, G. S.; Nemecek, S.; Nessi, M.; Onofre, A.; Orteu, S.; Padilla, C.; Pallin, D.; Pantea, D.; Patriarca, J.; Pereira, A.; Perlas, J. A.; Pilcher, J.; Pinhão, J.; Poggioli, L.; Poirot, S.; Price, L.; Protopopov, Y.; Proudfoot, J.; Pukhov, O.; Reinmuth, G.; Renzoni, G.; Richards, R.; Riu, I.; Romanov, V.; Ronceux, B.; Rumyantsev, V.; Russakovich, N.; Sanders, H.; Santos, J.; Sawyer, L.; Says, L.-P.; Seixas, J. M.; Sellden, B.; Semenov, A.; Senchishin, V.; Shchelchkov, A.; Shevtsov, V.; Schochet, M.; Sidorov, V.; Simaitis, V.; Sissakian, A.; Solodkov, A.; Sonderegger, P.; Soustruznik, K.; Stanek, R.; Starchenko, E.; Stephens, R.; Studenov, S.; Suk, M.; Surkov, A.; Tang, F.; Tardell, S.; Tas, P.; Teubert, F.; Thaler, J.; Tokar, S.; Topilin, N.; Trka, Z.; Turcot, A.; Turcotte, M.; Valkar, S.; Varandas, M. J.; Vartapetian, A.; Vazeille, F.; Vinogradov, V.; Vorozhtsov, S.; Wagner, D.; White, A.; Wolters, H.; Yamdagni, N.; Yarygin, G.; Yosef, C.; Zaitsev, A.; Zdrazil, M.

1997-02-01

40

Response of the ATLAS tile calorimeter prototype to muons  

E-print Network

A study of high energy muons traversing the ATLAS hadron Tile calorimeter in the barrel region in the energy range between 10 and 300~GeV is presented. Both test beam experimental data and Monte Carlo simulations are given and show good agreement. The Tile calorimeter capability of detecting isolated muons over the above energy range is demonstrated. A signal to background ratio of about 10 is expected for the nominal LHC luminosity ($10^{34} cm^{-2} sec^{-1}$). The photoelectron statistics effect in the muon shape response is shown. The e/mip ratio is found to be $ 0.81 \\pm 0.03$; the e/$\\mu$ ratio is in the range 0.91 - 0.97. The energy loss of a muon in the calorimeter, dominated by the energy lost in the absorber, can be correlated to the energy loss in the active material. This correlation allows one to correct on an event by event basis the muon energy loss in the calorimeter and therefore reduce the low energy tails in the muon momentum distribution.

Ajaltouni, Ziad J; Alifanov, A; Amaral, P; Amorim, A; Anderson, K J; Angelini, C; Astvatsaturov, A R; Autiero, D; Badaud, F; Barreira, G; Berglund, S R; Blanchot, G; Blucher, E; Blaj, C; Bogush, A A; Bohm, C; Boldea, V; Borisov, O N; Bosman, M; Bouhemaid, N; Brette, P; Bromberg, C; Brossard, M; Budagov, Yu A; Calôba, L P; Carvalho, J; Casado, M P; Cavalli-Sforza, M; Cavasinni, V; Chadelas, R; Chevaleyre, J C; Chirikov-Zorin, I E; Chlachidze, G; Cobal, M; Cogswell, F; Colaço, F; Constantinescu, S; Costanzo, D; Crouau, M; Daudon, F; David, M; Davidek, T; Dawson, J; Dugne, J J; De, K; Del Prete, T; De Santo, A; Di Girolamo, B; Dita, S; Dolejsi, J; Dolezal, Z; Downing, R; Efthymiopoulos, I; Errede, D; Errede, S; Evans, H; Ferrer, A; Flaminio, Vincenzo; Gallas, E J; Gaspar, M; Gildemeister, O; Glagolev, V V; Golubev, V B; Gómez, A; Grabskii, V; Haney, M; Hakopian, H H; Hellman, S; Henriques, A; Holmgren, S O; Honoré, P F; Huston, J; Ivanyushenkov, Yu M; Johansson, E K; Jon-And, K; Juste, A; Kakurin, S; Karapetian, G V; Karyukhin, A N; Khokhlov, Yu A; Klioukhine, V I; Kolomoets, V; Kopikov, S V; Kostrikov, M E; Kovtun, V E; Kukhtin, V V; Kulagin, M; Kulchitskii, Yu A; Lami, S; Lapin, V; Lazzeroni, C; Lebedev, A; Leitner, R; Li, J; Liba, I; Lomakin, Yu F; Lomakina, O V; Lokajícek, M; Maio, A; Malyukov, S N; Marroquin, F; Martins, J P; Mazzoni, E; Merritt, F S; Michel, B; Miller, E; Minashvili, I A; Miralles, L; Mnatzakanian, E A; Montarou, G; Muanza, G S; Némécek, S; Nessi, Marzio; Onofre, A; Orteu, S; Padilla, C; Pallin, D; Pantea, D; Patriarca, J; Pereira, A; Perlas, J A; Pilcher, J E; Pinhão, J; Poggioli, Luc; Poirot, S; Price, L; Protopopov, Yu; Proudfoot, J; Pukhov, O; Reinmuth, G; Renzoni, G; Richards, R; Riu, I; Romanov, V; Ronceux, B; Rumyantsev, V; Rusakovitch, N A; Sanders, H; Santos, J; Sawyer, L; Says, L P; Seixas, J M; Selldén, B; Semenov, A A; Senchyshyn, V G; Shchelchkov, A S; Shevtsov, V P; Shochet, M J; Sidorov, V; Simaitis, V J; Sissakian, A N; Solodkov, A A; Sonderegger, P; Soustruznik, K; Stanek, R; Starchenko, E A; Stephens, R; Studenov, S; Suk, M; Surkov, A; Tang, F; Tardell, S; Tas, P; Teubert, F; Thaler, J J; Tokár, S; Topilin, N D; Trka, Z; Turcot, A S; Turcotte, M; Valkár, S; Varanda, M J; Vartapetian, A H; Vazeille, F; Vinogradov, V; Vorozhtsov, S B; Wagner, D; White, Alan R; Wolters, H; Yamdagni, N; Yarygin, G; Yosef, C; Zaitsev, A; Zdrazil, M

1996-01-01

41

Irradiation effect on the response of the scintillators in the ATLAS Tile Calorimeter  

E-print Network

The Tile Calorimeter is the central hadronic calorimeter of the ATLAS experiment at the LHC. Together with the other calorimeters, it provides precise measurements of hadrons, jets, taus and missing transverse energy. The monitoring and equalisation of the calorimeter response at each stage of the signal development is allowed by a movable 137Cs radioactive source, a laser calibration system and a charge injection system. Moreover, during the LHC data taking, an integrator based readout provides signals coming from inelastic proton-proton collisions at low momentum transfer (minimum bias currents) and allows to monitor the instantaneous ATLAS luminosity as well as the response of calorimeter cells. Minimum bias currents have been used to detect and quantify the effect of TileCal scintillators irradiation using the data taken during 2012 which corresponds to about 22 fb-1 of integrated luminosity. The response variation for an irradiated cell has been studied combining the information from three calibration sy...

Fracchia, S; The ATLAS collaboration

2014-01-01

42

The QCAL tile calorimeter of KLOE  

NASA Astrophysics Data System (ADS)

The quadrupole tile calorimeters of KLOE (QCAL) are two compact detectors placed close to the interaction point and surrounding the focusing quadrupoles. Their purpose is to increase the hermeticity of KLOE calorimetry. Each QCAL consists of a sampling structure of lead plates and scintillator tiles with wavelength shifter (WLS) fibers and mesh photomultiplier readout arranged in 16 azimuthal sectors. The arrangement of WLS fibers allows the measurement of the longitudinal position of the showers from time of flight. In this paper we describe the QCAL design and assembly and present preliminary results obtained with both cosmic rays and photons from K L decays. The time and energy calibration procedures are also discussed in detail.

Adinolfi, M.; Ambrosino, F.; Antonelli, M.; Bini, C.; Bocci, V.; Bossi, F.; Branchini, P.; Cabibbo, G.; Caloi, R.; Carboni, G.; Casarsa, M.; Cataldi, G.; Ciambrone, P.; Conetti, S.; De Lucia, E.; De Simone, P.; Dell'Agnello, S.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Falco, S.; Doria, A.; Ferrari, A.; Finocchiaro, G.; Forti, C.; Franceschi, A.; Franzini, P.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Graziani, E.; Incagli, M.; Kuo, C.; Lanfranchi, G.; Martemianov, M.; Mei, W.; Messi, R.; Moccia, S.; Moulson, M.; Müller, S.; Murphy, C. T.; Murtas, F.; Pacciani, L.; Palutan, M.; Pasqualucci, E.; Passalacqua, L.; Passeri, A.; Picca, D.; Pirozzi, G.; Pontecorvo, L.; Primavera, M.; Santovetti, E.; Saracino, G.; Sciascia, B.; Sfiligoi, I.; Spadaro, T.; Spiriti, E.; Valente, P.; Valeriani, B.; Venanzoni, G.; Ventura, A.

2002-05-01

43

Compensation effects in hadron calorimeters  

Microsoft Academic Search

The pros and cons of utilizing a fissionable material such as ²³⁸U to compensate for the nuclear binding energy losses in a hadron calorimeter are discussed. Fissionable material can return some lost energy to the particle cascade in terms of low-energy neutrons and gamma rays, but electromagnetic sampling inefficiencies (often called transition effects) and the detection medium which tries to

T. A. Gabriel; B. L. Bishop; J. Brau; A. Di Ciaccio; M. Goodman; R. Wilson

1984-01-01

44

Compensation Effects in Hadron Calorimeters  

Microsoft Academic Search

The pros and cons of utilizing a fissionable material such as ²³⁸U to compensate for the nuclear binding energy losses in a hadron calorimeter are discussed. Fissionable material can return some lost energy to the particle cascade in terms of low-energy neutrons and gamma rays, but electromagnetic sampling inefficiencies (often called transition effects) and the detection medium which tries to

T. A. Gabriel; B. L. Bishop; J. Brau; A. di Ciaccio; M. Goodman; R. Wilson

1985-01-01

45

The small angle tile calorimeter in the DELPHI experiment  

Microsoft Academic Search

The Small angle TIle Calorimeter (STIC) provides calorimetric coverage in the very forward region of the DELPHI experiment at the CERN LEP collider. The structure of the calorimeters, built with a so-called “shashlik” technique, gives a perfectly hermetic calorimeter and still allows for the insertion of tracking detectors within the sampling structure to measure the direction of the showering particle.

S. J. Alvsvaag; M D Bari; G. Barreira; Alberto C Benvenuti; M. Bigi; M. Bonesini; M. Bozzo; T. Camporesi; H. Carling; V. Cassio; L. Castellani; R. Cereseto; F. Chignoli; G. Della Ricca; D. R. Dharmasiri; M. C. Espirito Santo; E. Falk; A. Fenyuk; P. Ferrari; D. Gamba; V. Giordano; Yu. Gouz; M. Guerzoni; S A Gumenyuk; V. Hedberg; G. Jarlskog; A N Karyukhin; A. Klovning; A K Konoplyannikov; I J Kronkvist; L. Lanceri; R. Leoni; O. A. Maeland; A. Maio; R. Mazza; E. Migliore; Francesco Luigi Navarria; P. Negri; B. Nossum; V F Obraztsov; A. Onofre; M. Paganoni; M. Pegoraro; L. Peralta; L P Petrovykh; M. Pimenta; P. Poropat; M. Prest; A. L. Read; A. Romero; N A Shalanda; L. Simonetti; T. B. Skaali; B. Stugu; F. Terranova; B. Tome; E. Torassa; P. P. Trapani; M. G. Verardi; E. Vallazza; E. Vlasov; A. Zaitsev

1999-01-01

46

The time structure of hadronic showers in highly granular calorimeters with tungsten and steel absorbers  

NASA Astrophysics Data System (ADS)

The intrinsic time structure of hadronic showers influences the timing capability and the required integration time of hadronic calorimeters in particle physics experiments, and depends on the active medium and on the absorber of the calorimeter. With the CALICE T3B experiment, a setup of 15 small plastic scintillator tiles read out with Silicon Photomultipliers, the time structure of showers is measured on a statistical basis with high spatial and temporal resolution in sampling calorimeters with tungsten and steel absorbers. The results are compared to GEANT4 (version 9.4 patch 03) simulations with different hadronic physics models. These comparisons demonstrate the importance of using high precision treatment of low-energy neutrons for tungsten absorbers, while an overall good agreement between data and simulations for all considered models is observed for steel.

Adloff, C.; Blaising, J.-J.; Chefdeville, M.; Drancourt, C.; Gaglione, R.; Geffroy, N.; Karyotakis, Y.; Koletsou, I.; Prast, J.; Vouters, G.; Repond, J.; Schlereth, J.; Xia, L.; Baldolemar, E.; Li, J.; Park, S. T.; Sosebee, M.; White, A. P.; Yu, J.; Eigen, G.; Thomson, M. A.; Ward, D. R.; Benchekroun, D.; Hoummada, A.; Khoulaki, Y.; Apostolakis, J.; Arfaoui, S.; Benoit, M.; Dannheim, D.; Elsener, K.; Folger, G.; Grefe, C.; Ivantchenko, V.; Killenberg, M.; Klempt, W.; van der Kraaij, E.; Linssen, L.; Lucaci-Timoce, A.-I.; Münnich, A.; Poss, S.; Ribon, A.; Roloff, P.; Sailer, A.; Schlatter, D.; Sicking, E.; Strube, J.; Uzhinskiy, V.; Cârloganu, C.; Gay, P.; Manen, S.; Royer, L.; Cornett, U.; David, D.; Ebrahimi, A.; Falley, G.; Feege, N.; Gadow, K.; Göttlicher, P.; Günter, C.; Hartbrich, O.; Hermberg, B.; Karstensen, S.; Krivan, F.; Krüger, K.; Lu, S.; Lutz, B.; Morozov, S.; Morgunov, V.; Neubüser, C.; Reinecke, M.; Sefkow, F.; Smirnov, P.; Terwort, M.; Fagot, A.; Tytgat, M.; Zaganidis, N.; Hostachy, J.-Y.; Morin, L.; Garutti, E.; Laurien, S.; Marchesini, I.; Matysek, M.; Ramilli, M.; Briggl, K.; Eckert, P.; Harion, T.; Schultz-Coulon, H.-Ch; Shen, W.; Stamen, R.; Chang, S.; Khan, A.; Kim, D. H.; Kong, D. J.; Oh, Y. D.; Bilki, B.; Norbeck, E.; Northacker, D.; Onel, Y.; Wilson, G. W.; Kawagoe, K.; Miyazaki, Y.; Sudo, Y.; Ueno, H.; Yoshioka, T.; Dauncey, P. D.; Cortina Gil, E.; Mannai, S.; Baulieu, G.; Calabria, P.; Caponetto, L.; Combaret, C.; Della Negra, R.; Eté, R.; Grenier, G.; Han, R.; Ianigro, J.-C.; Kieffer, R.; Laktineh, I.; Lumb, N.; Mathez, H.; Mirabito, L.; Petrukhin, A.; Steen, A.; Tromeur, W.; Vander Donckt, M.; Zoccarato, Y.; Berenguer Antequera, J.; Calvo Alamillo, E.; Fouz, M.-C.; Puerta-Pelayo, J.; Corriveau, F.; Bobchenko, B.; Chadeeva, M.; Danilov, M.; Epifantsev, A.; Markin, O.; Mizuk, R.; Novikov, E.; Rusinov, V.; Tarkovsky, E.; Kozlov, V.; Soloviev, Y.; Besson, D.; Buzhan, P.; Ilyin, A.; Kantserov, V.; Kaplin, V.; Popova, E.; Tikhomirov, V.; Gabriel, M.; Kiesling, C.; Seidel, K.; Simon, F.; Soldner, C.; Szalay, M.; Tesar, M.; Weuste, L.; Amjad, M. S.; Bonis, J.; Conforti di Lorenzo, S.; Cornebise, P.; Fleury, J.; Frisson, T.; van der Kolk, N.; Richard, F.; Pöschl, R.; Rouëné, J.; Anduze, M.; Balagura, V.; Becheva, E.; Boudry, V.; Brient, J.-C.; Cornat, R.; Frotin, M.; Gastaldi, F.; Guliyev, E.; Haddad, Y.; Magniette, F.; Ruan, M.; Tran, T. H.; Videau, H.; Callier, S.; Dulucq, F.; Martin-Chassard, G.; de la Taille, Ch; Raux, L.; Seguin-Moreau, N.; Zacek, J.; Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Kvasnicka, J.; Lednicky, D.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.; Belhorma, B.; Ghazlane, H.; Kotera, K.; Ono, H.; Takeshita, T.; Uozumi, S.; Chai, J. S.; Song, H. S.; Lee, S. H.; Götze, M.; Sauer, J.; Weber, S.; Zeitnitz, C.

2014-07-01

47

Measurement of pion and proton response and longitudinal shower profiles up to 20 nuclear interaction lengths with the ATLAS Tile calorimeter  

Microsoft Academic Search

The response of pions and protons in the energy range of 20–180GeV, produced at CERN's SPS H8 test-beam line in the ATLAS iron–scintillator Tile hadron calorimeter, has been measured. The test-beam configuration allowed the measurement of the longitudinal shower development for pions and protons up to 20 nuclear interaction lengths. It was found that pions penetrate deeper in the calorimeter

P. Adragna; C. Alexa; K. Anderson; A. Antonaki; A. Arabidze; L. Batkova; V. Batusov; H. P. Beck; E. Bergeaas Kuutmann; C. Biscarat; G. Blanchot; A. Bogush; C. Bohm; V. Boldea; M. Bosman; C. Bromberg; J. Budagov; D. Burckhart-Chromek; M. Caprini; L. Caloba; D. Calvet; T. Carli; J. Carvalho; M. Cascella; J. Castelo; M. V. Castillo; M. Cavalli-Sforza; V. Cavasinni; A. S. Cerqueira; C. Clement; M. Cobal; F. Cogswell; S. Constantinescu; D. Costanzo; A. Corso-Radu; C. Cuenca; D. O. Damazio; T. Davidek; K. de; T. Del Prete; B. Di Girolamo; S. Dita; T. Djobava; M. Dobson; A. Dotti; R. Downing; I. Efthymiopoulos; D. Eriksson; D. Errede; S. Errede; A. Farbin; D. Fassouliotis; R. Febbraro; A. Fenyuk; C. Ferdi; A. Ferrer; V. Flaminio; D. Francis; E. Fullana; S. Gadomski; S. Gameiro; V. Garde; K. Gellerstedt; V. Giakoumopoulou; O. Gildemeister; V. Gilewsky; N. Giokaris; N. Gollub; A. Gomes; V. Gonzalez; B. Gorini; P. Grenier; P. Gris; M. Gruwe; V. Guarino; C. Guicheney; A. Gupta; C. Haeberli; H. Hakobyan; M. Haney; S. Hellman; A. Henriques; E. Higon; S. Holmgren; M. Hurwitz; J. Huston; C. Iglesias; A. Isaev; I. Jen-La Plante; M. Joos; T. Junk; A. Karyukhin; A. Kazarov; H. Khandanyan; J. Khramov; J. Khubua; S. Kolos; I. Korolkov; P. Krivkova; Y. Kulchitsky; Yu. Kurochkin; P. Kuzhir; T. Le Compte; R. Lefevre; G. Lehmann; R. Leitner; M. Lembesi; J. Lesser; J. Li; M. Liablin; M. Lokajicek; Y. Lomakin; A. Lupi; C. Maidanchik; A. Maio; M. Makouski; S. Maliukov; A. Manousakis; L. Mapelli; C. Marques; F. Marroquim; F. Martin; E. Mazzoni; F. Merritt; A. Miagkov; R. Miller; I. Minashvili; L. Miralles; G. Montarou; M. Mosidze; A. Myagkov; S. Nemecek; M. Nessi; L. Nodulman; B. Nordkvist; O. Norniella; J. Novakova; A. Onofre; M. Oreglia; D. Pallin; D. Pantea; J. Petersen; J. Pilcher; J. Pina; J. Pinhão; F. Podlyski; X. Portell; J. Poveda; L. Pribyl; L. E. Price; J. Proudfoot; M. Ramstedt; R. Richards; C. Roda; V. Romanov; P. Rosnet; P. Roy; A. Ruiz; V. Rumiantsev; N. Russakovich; O. Saltó; B. Salvachua; E. Sanchis; H. Sanders; C. Santoni; J. G. Saraiva; F. Sarri; I. Satsunkevitch; L.-P. Says; G. Schlager; J. Schlereth; J. M. Seixas; B. Selldèn; N. Shalanda; P. Shevtsov; M. Shochet; J. Silva; P. Da Silva; V. Simaitis; M. Simonyan; A. Sissakian; J. Sjölin; C. Solans; A. Solodkov; I. Soloviev; O. Solovyanov; M. Sosebee; F. Spanò; R. Stanek; E. Starchenko; P. Starovoitov; P. Stavina; M. Suk; I. Sykora; F. Tang; P. Tas; R. Teuscher; S. Tokar; N. Topilin; J. Torres; L. Tremblet; P. Tsiareshka; M. Tylmad; D. Underwood; G. Unel; G. Usai; A. Valero; S. Valkar; J. A. Valls; A. Vartapetian; F. Vazeille; I. Vichou; V. Vinogradov; I. Vivarelli; M. Volpi; A. White; A. Zaitsev; A. Zenine; T. Zenis

2010-01-01

48

The Time Structure of Hadronic Showers in Calorimeters with Scintillator and with Gas Readout  

NASA Astrophysics Data System (ADS)

The time structure of hadronic showers is characterized by a prompt component from relativistic particles and by late components predominantly connected to neutrons in the cascade. The sensitivity to this late component thus depends on the choice of the active medium for hadronic calorimeters. The time structure and the differences originating from different readout technologies in a calorimeter with tungsten absorbers are studied with two dedicated setups using scintillator tiles read out with SiPMs and glass RPCs. In both cases, a radial strip of 15 cells with a size of 3 × 3 cm2 each is read out with fast digitizers with deep buffers, providing detailed information on the time structure of the recorded signals over a long sampling window. We will discuss the technical aspects of these systems, and present results on the time structure measurements, which demonstrate sizeable differences in the response of scintillator and gaseous detectors to the neutron components of the hadronic cascade.

Szalay, Marco

2014-06-01

49

Radiation hardness tests of scintillating tile\\/WLS fiber calorimeter modules  

Microsoft Academic Search

The radiation hardness properties of a tile\\/fiber calorimeter with different materials or with different optical path layouts have been studied. Ten calorimeter modules of a geometry similar to that of the proposed SDC calorimeter were irradiated using the BEPC electron beam (1.1 or 1.3 GeV). Radiation damage was quantified by measuring the light yield at various locations within the calorimeter

S. W. Han; L. D. Hu; N. Z. Liu; H. S. Mao; H. Z. Shi; Y. P. Tan; G. L. Wang; C. D. Zhang; G. Zhang; L. S. Zhang; Z. X. Zhang; X. J. Zhao; L. S. Zheng; X. C. Zhong; Y. S. Zhou; A. Byon-Wagner; D. Green; A. Para; K. Johnson; V. Barnes

1995-01-01

50

Calorimeter Simulation with Hadrons in CMS  

SciTech Connect

CMS is using Geant4 to simulate the detector setup for the forthcoming data from the LHC. Validation of physics processes inside Geant4 is a major concern in view of getting a proper description of jets and missing energy for signal and background events. This is done by carrying out an extensive studies with test beam using the prototypes or real detector modules of the CMS calorimeter. These data are matched with Geant4 predictions using the same framework that is used for the entire CMS detector. Tuning of the Geant4 models is carried out and steps to be used in reproducing detector signals are defined in view of measurements of energy response, energy resolution, transverse and longitudinal shower profiles for a variety of hadron beams over a broad energy spectrum between 2 to 300 GeV/c. The tuned Monte Carlo predictions match many of these measurements within systematic uncertainties.

Piperov, Stefan; /Sofiya, Inst. Nucl. Res. /Fermilab

2008-11-01

51

The compensation condition in hadron calorimeters by the filtering effect  

SciTech Connect

The equalization between the electromagnetic and the hadronic signals is the condition for obtaining the linear response of a calorimeter to hadronic showers and an energy resolution that improves as the incident energy increases. In a calorimeter with silicon readout, the use of a combination of low-Z and high-Z materials as absorbers allows the transformation of the electron energy distribution of the incidence showers in two media with different critical energies. As a result, the response of the calorimeter to incoming showers is modified to achieve the compensation condition (e/h = 1).

Lemilleur, F. (CERN (CH)); Burchi, E.; Macii, R. (INFN-Florence (IT)); Lamarche, F.; Leroy, C. (Montreal Univ., PQ (Canada)); Bruzzi, M.; Furetta, C.; Paludetto, R.; Pensotti, S.; Rancoita, P.G.; Vismara, L. (INFN, Milan (IT)); Seidman, A. (Tel Aviv Univ. (Israel)); Giubellino, P.; Ramello, L.; Riccati, L. (INFN, Turin (IT)); Penzo, A. (INFN, Trieste (IT))

1990-06-01

52

A Scintillator tile-fiber preshower detector for the CDF Central Calorimeter  

SciTech Connect

The front face of the CDF central calorimeter is being equipped with a new Preshower detector, based on scintillator tiles read out by WLS fibers. A light yield of about 40 pe/MIP at the tile exit was obtained, exceeding the design requirements.

S. Lami

2004-08-12

53

Electromagnetic and hadron calorimeters in the MIPP experiment  

SciTech Connect

The purpose of the MIPP experiment is to study the inclusive production of photons, pions, kaons, and nucleons in {pi}, K, and p interactions on various targets using beams from the Main Injector at Fermilab. The function of the calorimeters is to measure the production of forward-going neutrons and photons. The electromagnetic calorimeter consists of 10 lead plates interspersed with proportional chambers. It was followed by the hadron calorimeter with 64 steel plates interspersed with scintillator. The data presented were collected with a variety of targets and beam momenta from 5 to 120 GeV/c. The energy calibration of both calorimeters with electrons, pions, kaons, and protons is discussed. The resolution for electrons was found to be 0.27/{radical}E, and for hadrons the resolution was 0.554/{radical}E with a constant term of 2.6%. The performance of the calorimeters was tested on a neutron sample.

Nigmanov, T.S.; Gustafson, H.R.; Longo, M.J.; Park, H.K.; Rajaram, D.; /Michigan U.; Dukes, C.; Lu, L.C.; Materniak, C.; Nelson, K.; Norman, A.; /Virginia U.; Meyer, H.; /Fermilab /Harvard U. /Indiana U. /Iowa U. /Purdue U.

2008-10-01

54

Track segments in hadronic showers in a highly granular scintillator-steel hadron calorimeter  

NASA Astrophysics Data System (ADS)

We investigate the three dimensional substructure of hadronic showers in the CALICE scintillator-steel hadronic calorimeter. The high granularity of the detector is used to find track segments of minimum ionising particles within hadronic showers, providing sensitivity to the spatial structure and the details of secondary particle production in hadronic cascades. The multiplicity, length and angular distribution of identified track segments are compared to GEANT4 simulations with several different shower models. Track segments also provide the possibility for in-situ calibration of highly granular calorimeters.

Adloff, C.; Blaising, J.-J.; Chefdeville, M.; Drancourt, C.; Gaglione, R.; Geffroy, N.; Karyotakis, Y.; Koletsou, I.; Prast, J.; Vouters, G.; Francis, K.; Repond, J.; Schlereth, J.; Smith, J.; Xia, L.; Baldolemar, E.; Li, J.; Park, S. T.; Sosebee, M.; White, A. P.; Yu, J.; Eigen, G.; Mikami, Y.; Watson, N. K.; Mavromanolakis, G.; Thomson, M. A.; Ward, D. R.; Yan, W.; Benchekroun, D.; Hoummada, A.; Khoulaki, Y.; Apostolakis, J.; Dannheim, D.; Dotti, A.; Folger, G.; Ivantchenko, V.; Klempt, W.; van der Kraaij, E.; Lucaci-Timoce, A.-I.; Ribon, A.; Schlatter, D.; Uzhinskiy, V.; Cârloganu, C.; Gay, P.; Manen, S.; Royer, L.; Tytgat, M.; Zaganidis, N.; Blazey, G. C.; Dyshkant, A.; Lima, J. G. R.; Zutshi, V.; Hostachy, J.-Y.; Morin, L.; Cornett, U.; David, D.; Falley, G.; Gadow, K.; Göttlicher, P.; Günter, C.; Hartbrich, O.; Hermberg, B.; Karstensen, S.; Krivan, F.; Krüger, K.; Lu, S.; Morozov, S.; Morgunov, V.; Reinecke, M.; Sefkow, F.; Smirnov, P.; Terwort, M.; Feege, N.; Garutti, E.; Laurien, S.; Marchesini, I.; Matysek, M.; Ramilli, M.; Briggl, K.; Eckert, P.; Harion, T.; Schultz-Coulon, H.-Ch; Shen, W.; Stamen, R.; Bilki, B.; Norbeck, E.; Onel, Y.; Wilson, G. W.; Kawagoe, K.; Sudo, Y.; Yoshioka, T.; Dauncey, P. D.; Magnan, A.-M.; Bartsch, V.; Wing, M.; Salvatore, F.; Cortina Gil, E.; Mannai, S.; Baulieu, G.; Calabria, P.; Caponetto, L.; Combaret, C.; Della Negra, R.; Grenier, G.; Han, R.; Ianigro, J.-C.; Kieffer, R.; Laktineh, I.; Lumb, N.; Mathez, H.; Mirabito, L.; Petrukhin, A.; Steen, A.; Tromeur, W.; Vander Donckt, M.; Zoccarato, Y.; Calvo Alamillo, E.; Fouz, M.-C.; Puerta-Pelayo, J.; Corriveau, F.; Bobchenko, B.; Chadeeva, M.; Danilov, M.; Epifantsev, A.; Markin, O.; Mizuk, R.; Novikov, E.; Popov, V.; Rusinov, V.; Tarkovsky, E.; Kirikova, N.; Kozlov, V.; Smirnov, P.; Soloviev, Y.; Buzhan, P.; Ilyin, A.; Kantserov, V.; Kaplin, V.; Karakash, A.; Popova, E.; Tikhomirov, V.; Kiesling, C.; Seidel, K.; Simon, F.; Soldner, C.; Szalay, M.; Tesar, M.; Weuste, L.; Amjad, M. S.; Bonis, J.; Callier, S.; Conforti di Lorenzo, S.; Cornebise, P.; Doublet, Ph; Dulucq, F.; Fleury, J.; Frisson, T.; van der Kolk, N.; Li, H.; Martin-Chassard, G.; Richard, F.; de la Taille, Ch; Pöschl, R.; Raux, L.; Rouëné, J.; Seguin-Moreau, N.; Anduze, M.; Balagura, V.; Boudry, V.; Brient, J.-C.; Cornat, R.; Frotin, M.; Gastaldi, F.; Guliyev, E.; Haddad, Y.; Magniette, F.; Musat, G.; Ruan, M.; Tran, T. H.; Videau, H.; Bulanek, B.; Zacek, J.; Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Kvasnicka, J.; Lednicky, D.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.; Belhorma, B.; Ghazlane, H.; Kotera, K.; Takeshita, T.; Uozumi, S.; Jeans, D.; Götze, M.; Sauer, J.; Weber, S.; Zeitnitz, C.

2013-09-01

55

Simulation of Cosmic Muons in the ATLAS Tile Calorimeter Seth Zenz(1)  

E-print Network

Simulation of Cosmic Muons in the ATLAS Tile Calorimeter Seth Zenz(1) (1) University of Chicago, Chicago, USA Abstract This note describes a simulation of cosmic muons passing near the origin frequently to serve a useful purpose during the commissioning of the detector. The simulation accounts

56

Performance of the DELPHI small angle tile calorimeter  

Microsoft Academic Search

The DELPHI STIC detector is a lead-scintillator sampling calorimeter with wavelength shifting optical fibers used for light collection. The main goal of the calorimeter at LEP100 is to measure the luminosity with an accuracy better than 0.1%. The detector has been in operation since the 1994 LEP run. Presented here is the performance measured during the 1994-1995 LEP runs, with

S. J. Alvsvaag; O. A. Macland; A. Klovning; A. C. Benvenuti; V. Giordano; M. Guerzoni; F. L. Navarria; A. Perrotta; T. Camporesi; V. Obraztsov; M. Paganoni; E. Vallazza; M. Bozzo; R. Cereseto; G. Barreira; M. C. Espirito Santo; A. Maio; A. Onofre; L. Peralta; M. Pimenta; B. Tome; H. Carling; E. Falk; V. Hedberg; G. Jarlskog; I. Kronkvist; M. Bonesini; F. Chignoli; P. Ferrari; S. Gumenyuk; R. Leoni; R. Mazza; P. Negri; L. Petrovykh; F. Terranova; D. R. Dharmasiri; B. Nossum; A. L. Read; B. Skaali; L. Castellani; M. Pegoraro; A. Fenyuk; I. Ivanyushenkov; A. Karyukhin; A. Konopliannikov; N. Shalanda; V. Sen'ko; E. Vlasov; A. Zaitsev; M. Bigi; V. Cassio; D. Gamba; I. Gouz; E. Migliore; A. Romero; L. Simonetti; P. P. Trapani; M. Bari; G. Della Ricca; L. Lanceri; P. Poropat; M. Prest

1996-01-01

57

The sROD module for the ATLAS Tile Calorimeter upgrade demonstrator  

E-print Network

This work presents the first prototype of the super Read-Out Driver (sROD) demonstrator board for the Tile Calorimeter Demonstrator project. This project aims to test the new readout electronics architecture for the Phase 2 Upgrade of the ATLAS Tile Calorimeter, replacing the front-end electronics of one complete drawer with the new electronics during the Long Shutdown 1 (2013-2014), in order to evaluate its performance. The sROD demonstrator board will receive and process data from a complete module. Moreover the sROD demonstrator board will send preprocessed data to the present trigger system, and will transmit trigger control and timing information (TTC) and Detector Control System (DCS) commands to the front-end. A detailed description of the sROD board design, firmware and control and data acquisition software. We also will present the first results of this module during the commissioning of the upgraded TileCal module.

Carrio Argos, Fernando; The ATLAS collaboration

2014-01-01

58

Plate stamping of masterplates for the Tile-Cal hadronic calorimetric for ATLAS detector at CERN  

SciTech Connect

Various methods have been explored for the fabrication of the large trapezoidal plates used in the construction of the Tile-Cal hadronic calorimeter for ATLAS. The options include die stamping, laser cutting, waterjet cutting, plasma arc cutting, and a combination of machining and laser cutting. Very early in the program, the Argonne group began investigating the possibility of die stamping the master plates. At that time it was felt that two dies would be necessary to achieve the accuracy required. Quotations were received for dies for both the master and spacer plates. Concern was expressed by many members of the collaboration that due to the very precise tolerances required, die stamping, using standard dies, would not be adequate. Fine blanking techniques were felt to be adequate, but were cost prohibitive. Two methods were finally used for the initial cutting of prototype plates, laser cutting and die stamping. Only the die stamping, will be reviewed here.

Hill, N.F.; Petereit, E.; Wood, K.; Proudfoot, J.

1996-05-16

59

Computing challenges in the certification of ATLAS Tile Calorimeter front-end electronics during maintenance periods  

NASA Astrophysics Data System (ADS)

After two years of operation of the LHC, the ATLAS Tile calorimeter is undergoing a consolidation process of its front-end electronics. The certification is performed in the experimental area with a portable test-bench which is capable of controlling and reading out one front-end module through dedicated cables. This test-bench has been redesigned to improve the tests of the electronics functionality quality assessment of the data until the end of Phase I.

Solans, C.; Carrió, F.; Kim, H. Y.; Moreno, P.; Reed, R.; Sandrock, C.; Ruan, X.; Shalyugin, A.; Schettino, V.; Souza, J.; Usai, G.; Valero, A.; Tile calorimeter system, Atlas

2014-06-01

60

Measurement of pion and proton response and longitudinal shower profiles up to 20 nuclear interaction lengths with the ATLAS Tile calorimeter  

NASA Astrophysics Data System (ADS)

The response of pions and protons in the energy range of 20-180 GeV, produced at CERN's SPS H8 test-beam line in the ATLAS iron-scintillator Tile hadron calorimeter, has been measured. The test-beam configuration allowed the measurement of the longitudinal shower development for pions and protons up to 20 nuclear interaction lengths. It was found that pions penetrate deeper in the calorimeter than protons. However, protons induce showers that are wider laterally to the direction of the impinging particle. Including the measured total energy response, the pion-to-proton energy ratio and the resolution, all observations are consistent with a higher electromagnetic energy fraction in pion-induced showers. The data are compared with GEANT4 simulations using several hadronic physics lists. The measured longitudinal shower profiles are described by an analytical shower parametrization within an accuracy of 5-10%. The amount of energy leaking out behind the calorimeter is determined and parametrized as a function of the beam energy and the calorimeter depth. This allows for a leakage correction of test-beam results in the standard projective geometry.

Adragna, P.; Alexa, C.; Anderson, K.; Antonaki, A.; Arabidze, A.; Batkova, L.; Batusov, V.; Beck, H. P.; Bergeaas Kuutmann, E.; Biscarat, C.; Blanchot, G.; Bogush, A.; Bohm, C.; Boldea, V.; Bosman, M.; Bromberg, C.; Budagov, J.; Burckhart-Chromek, D.; Caprini, M.; Caloba, L.; Calvet, D.; Carli, T.; Carvalho, J.; Cascella, M.; Castelo, J.; Castillo, M. V.; Cavalli-Sforza, M.; Cavasinni, V.; Cerqueira, A. S.; Clement, C.; Cobal, M.; Cogswell, F.; Constantinescu, S.; Costanzo, D.; Corso-Radu, A.; Cuenca, C.; Damazio, D. O.; Davidek, T.; De, K.; Del Prete, T.; Di Girolamo, B.; Dita, S.; Djobava, T.; Dobson, M.; Dotti, A.; Downing, R.; Efthymiopoulos, I.; Eriksson, D.; Errede, D.; Errede, S.; Farbin, A.; Fassouliotis, D.; Febbraro, R.; Fenyuk, A.; Ferdi, C.; Ferrer, A.; Flaminio, V.; Francis, D.; Fullana, E.; Gadomski, S.; Gameiro, S.; Garde, V.; Gellerstedt, K.; Giakoumopoulou, V.; Gildemeister, O.; Gilewsky, V.; Giokaris, N.; Gollub, N.; Gomes, A.; Gonzalez, V.; Gorini, B.; Grenier, P.; Gris, P.; Gruwe, M.; Guarino, V.; Guicheney, C.; Gupta, A.; Haeberli, C.; Hakobyan, H.; Haney, M.; Hellman, S.; Henriques, A.; Higon, E.; Holmgren, S.; Hurwitz, M.; Huston, J.; Iglesias, C.; Isaev, A.; Jen-La Plante, I.; Jon-And, K.; Joos, M.; Junk, T.; Karyukhin, A.; Kazarov, A.; Khandanyan, H.; Khramov, J.; Khubua, J.; Kolos, S.; Korolkov, I.; Krivkova, P.; Kulchitsky, Y.; Kurochkin, Yu.; Kuzhir, P.; Le Compte, T.; Lefevre, R.; Lehmann, G.; Leitner, R.; Lembesi, M.; Lesser, J.; Li, J.; Liablin, M.; Lokajicek, M.; Lomakin, Y.; Lupi, A.; Maidanchik, C.; Maio, A.; Makouski, M.; Maliukov, S.; Manousakis, A.; Mapelli, L.; Marques, C.; Marroquim, F.; Martin, F.; Mazzoni, E.; Merritt, F.; Miagkov, A.; Miller, R.; Minashvili, I.; Miralles, L.; Montarou, G.; Mosidze, M.; Myagkov, A.; Nemecek, S.; Nessi, M.; Nodulman, L.; Nordkvist, B.; Norniella, O.; Novakova, J.; Onofre, A.; Oreglia, M.; Pallin, D.; Pantea, D.; Petersen, J.; Pilcher, J.; Pina, J.; Pinhão, J.; Podlyski, F.; Portell, X.; Poveda, J.; Pribyl, L.; Price, L. E.; Proudfoot, J.; Ramstedt, M.; Richards, R.; Roda, C.; Romanov, V.; Rosnet, P.; Roy, P.; Ruiz, A.; Rumiantsev, V.; Russakovich, N.; Saltó, O.; Salvachua, B.; Sanchis, E.; Sanders, H.; Santoni, C.; Saraiva, J. G.; Sarri, F.; Satsunkevitch, I.; Says, L.-P.; Schlager, G.; Schlereth, J.; Seixas, J. M.; Selldèn, B.; Shalanda, N.; Shevtsov, P.; Shochet, M.; Silva, J.; Da Silva, P.; Simaitis, V.; Simonyan, M.; Sissakian, A.; Sjölin, J.; Solans, C.; Solodkov, A.; Soloviev, I.; Solovyanov, O.; Sosebee, M.; Spanò, F.; Stanek, R.; Starchenko, E.; Starovoitov, P.; Stavina, P.; Suk, M.; Sykora, I.; Tang, F.; Tas, P.; Teuscher, R.; Tokar, S.; Topilin, N.; Torres, J.; Tremblet, L.; Tsiareshka, P.; Tylmad, M.; Underwood, D.; Unel, G.; Usai, G.; Valero, A.; Valkar, S.; Valls, J. A.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vinogradov, V.; Vivarelli, I.; Volpi, M.; White, A.; Zaitsev, A.; Zenine, A.; Zenis, T.

2010-04-01

61

A hadronic calorimeter with Glass RPC as sensitive medium  

NASA Astrophysics Data System (ADS)

The SDHCAL technological prototype is a 1 × 1 × 1.3 m3 high-granularity Semi-Digital Hadronic CALorimeter using Glass Resistive Plate Chambers as sensitive medium. It is one of the two HCAL options considered by the ILD Collaboration to be proposed for the detector of the future International Linear Collider project. The prototype is made of up to 50 GRPC detectors of 1 m2 size and 3 mm thickness each with an embedded semi-digital electronics readout that is autotriggering and power-pulsed. The GRPC readout is finely segmented into pads of 1 cm2. Measured performances of the GRPC and the full SDHCAL prototype in terms of homogeneity, low noise and energy resolution are presented in this proceeding.

Grenier, G.

2014-09-01

62

The CMS Hadron Forward Calorimeter Upgrade During Phase I  

NASA Astrophysics Data System (ADS)

The CMS Hadron Forward Calorimeter is being upgraded during phase 1. The upgrade includes the replacement of the current PMTs with the 4-anode ones and the readout electronics. Stray muons hitting the PMT windows produce Cherenkov light causing erroneous signals. These signals are detrimental to the triggering and physic results, since such signals mimic very high energy events. The new 4-anode PMTs are selected because of their thin windows to reduce the Cherenkov light production. Additional anodes also provide information to eliminate such signals. These new PMTs have been tested extensively to understand their characteristics and to develop the algorithms to eliminate the unwanted signals. Eventually, the current read out will be replaced with two-channel readout electronics for each PMT. The overall expected improvement on the physics results will also be discussed.

Gülmez, E.

2014-06-01

63

Charge PreAmplifier Functionality in Gas Electron Multiplier Digital Hadron Calorimeter at UTA  

Microsoft Academic Search

A digital hadron calorimeter (DHCAL) is a sampling calorimeter that could provide the necessary jet energy resolution for International Linear Collider physics when used with the Particle Flow Algorithms (PFA). UTA's High Energy Physics (HEP) group has been developing a DHCAL using Gas Electron Multiplier (GEM) technology. GEM amplifies energy deposit from traversing charged particles using a high electric field

Heather Brown; Changhie Hahn; Wonjeong Kim; Jia Li; Carlos Medina; Akihiro Nozawa; Jacob Smith; Andy White; Jaehoon Yu

2006-01-01

64

Estimation of hadronic and EM resolution for scintillator plate calorimeter configurations  

SciTech Connect

CALOR89 Simulation code has been used to estimate the hadronic and electromagnetic resolutions for the various scintillator plate calorimeter configurations. The goal of this study was to determine the optimum combination of Lead and Iron based calorimeter, which retains compensation and linearity. The configurations considered are Lead/Scintillator and Fe/Scintillator and their combinations. Ultimately, we hope to test these configurations in the hanging file beam test at Fermilab in this spring. 12 figs., 4 tabs.

Job, P.K.; Proudfoot, J.

1991-01-01

65

Evidence for compensation and study of lateral shower developments in Si/U hadron calorimeters  

SciTech Connect

In a Si/U hadron calorimeter, a combination of low-Z and high-Z materials used as absorber enables the reduction of the calorimeter response to the electromagnetic component of the incoming hadronic showers (the local hardening effect). This paper reports that as a result, a ratio varying from e/{pi} {gt} 1 to e/{pi} {lt} 1 is obtained as a function of the low-Z material thickness, demonstrating the possibility of achieving the compensation condition (e/{pi} = 1).

Borchi, E.; Macii, R. (Florence Univ. (Italy)); Furetta, C.; Paludetto, R.; Pensotti, S.; Rancoita, P.G.; Salvato, G.; Seidman, A.; Vismara, L. (INFN, I-20133 Milan (IT)); Lamarche, F.; Leroy, C.; Manoukian-Bertrand, C. (Montreal Univ., PQ (Canada)); Penzo, A.; Villari, A. (INFN, I-34127 Trieste (IT)); Giubellino, P.; Ramello, L.; Riccati, L. (INFN, I-10125 Turin (IT))

1991-04-01

66

Performance of the liquid argon electromagnetic and hadronic accordion calorimeter for the LHC  

NASA Astrophysics Data System (ADS)

A large scale prototype of a liquid argon accordion calorimeter, conceived as a sector of a full LHC Barrel detector and consisting of an electromagnetic and a hadronic section, has been constructed and tested at the CERN SPS with electron and pion beams in the energy range 10-287 GeV.

Gingrich, D.; Greenious, G.; Kitching, P.; Olsen, B.; Pinfold, J.; Rodning, N.; Boos, E.; Schaoutnikov, B. O.; Aubert, B.; Bazan, A.; Beaugiraud, B.; Colas, J.; Leflour, T.; Marie, M.; Stipcevic, M.; Wingerter-Seez, I.; Zolnierowski, Y. P.; Chemeissiani, M.; Fernandez, E.; Garrido, Ll.; Martinez, M.; Padilla, C.; Gordon, H. A.; Radeka, V.; Rahm, D.; Stephani, D.; Chevalley, J. L.; Fabjan, C. W.; Gildemeister, O.; Jenni, P.; Nessi, M.; Poggioli, L.; Richtel, W.; Vuillemin, V.; Baze, J. M.; Gosset, L.; Lavocat, P.; Lottin, J. P.; Mansoulie, B.; Meyer, J. P.; Renardy, J. F.; Schwindling, J.; Teiger, J.; Zaccone, H.; Collot, J.; de Saintignon, P.; Dzahini, D.; Laborie, G.; Mahout, G.; Merchez, E.; Pouxe, J.; Battistoni, G.; Camin, D. V.; Cavalli, D.; Costa, G.; Cozzi, L.; Cravero, A.; Ferrari, A.; Gianotti, F.; Mandelli, L.; Manfredi, F.; Mazzanti, M.; Perini, L.; Re, V.; Sala, P.; Speziali, V.; Barreiro, F.; Hervas, L.; Labarga, L.; Basa, S.; Checktman, A.; Clemens, J. C.; Cousinou, M. C.; Dargent, P.; Etienne, F.; Fouchez, D.; Monnier, E.; Nacash, R.; Nagy, E.; Olivetto, C.; Sauvage, D.; Tisserant, S.; Azuelos, G.; Beaudoin, G.; Depommier, P.; Florian, E. I.; Leroy, C.; Roy, J.; Augé, E.; Chase, R.; Chollet, J. C.; de La Taille, C.; Fayard, L.; Fournier, D.; Hirosoho, A.; Jean, Ph.; Iconomidou-Fayard, L.; Merkel, B.; Noppe, J. M.; Parrour, G.; Pétroff, P.; Repellin, J. P.; Schaffer, A.; Seguin, N.; Serin, L.; Unal, G.; Canton, D.; Hansl-Kozanecka, G.; Imbault, D.; Lory, J.; Zitoun, R.; Owe Eek, L.; Lund-Jensen, B.; Soderqvist, J.; Astbury, A.; Gaidos, G.; Keeler, R.; Lefebvre, M.; White, J.

1994-04-01

67

Optimization of Energy Resolution in the Digital Hadron Calorimeter using Longitudinal Weights  

NASA Astrophysics Data System (ADS)

Physics at a future lepton collider requires unprecedented jet energy and dijet mass resolutions. Particle Flow Algorithms (PFAs) have been proposed to achieve these. PFAs measure particles in a jet individually with the detector subsystem providing the best resolution. For this to work a calorimeter system with very high granularity is required. A prototype Digital Hadron Calorimeter (the DHCAL) based on the Resistive Plate Chamber (RPC) technology with a record count of readout channels has been developed, constructed, and exposed to particle beams. In this context, we report on a technique to improve the single hadron energy resolution by applying a set of calibration weights to the individual layers of the calorimeter. This weighting procedure was applied to approximately 1 million events in the energy range up to 60 GeV and shows an improvement in the pion energy resolution. Simulated data is used to verify particle identification techniques and to compare with the data.

Smith, J. R.; Bilki, B.; Francis, K.; Repond, J.; Schlereth, J.; Xia, L.

2013-04-01

68

Impact of dead zones on the response of a hadron calorimeter with projective and non-projective geometry  

E-print Network

The aim of this study is to find an optimal mechanical design of the hadronic calorimeter for SiD detector which takes into account engineering as well as physics requirements. The study focuses on the crack effects between two modules for various barrel mechanical design on calorimeter response. The impact of different size of the supporting stringers and dead areas in an active calorimeter layer along the module boundary has been studied for single pions and muons. The emphasis has been put on the comparison of the projective and non-projective barrel geometry for SiD hadronic calorimeter.

J. Blaha; N. Geffroy; Y. Karyotakis

2011-02-07

69

Impact of dead zones on the response of a hadron calorimeter with projective and non-projective geometry  

E-print Network

The aim of this study is to find an optimal mechanical design of the hadronic calorimeter for SiD detector which takes into account engineering as well as physics requirements. The study focuses on the crack effects between two modules for various barrel mechanical design on calorimeter response. The impact of different size of the supporting stringers and dead areas in an active calorimeter layer along the module boundary has been studied for single pions and muons. The emphasis has been put on the comparison of the projective and non-projective barrel geometry for SiD hadronic calorimeter.

Blaha, J; Karyotakis, Y

2011-01-01

70

Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC  

NASA Astrophysics Data System (ADS)

The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt{s} = 900 {GeV} and 7 TeV collected during 2009 and 2010. Then, using the decay of K s and ? particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5 % for central isolated hadrons and 1-3 % for the final calorimeter jet energy scale.

Aad, G.; Abbott, B.; Abdallah, J.; Abdelalim, A. A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; AbouZeid, O. S.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B. S.; Adamczyk, L.; Adams, D. L.; Addy, T. N.; Adelman, J.; Aderholz, M.; Adomeit, S.; Adragna, P.; Adye, T.; Aefsky, S.; Aguilar-Saavedra, J. A.; Aharrouche, M.; Ahlen, S. P.; Ahles, F.; Ahmad, A.; Ahsan, M.; Aielli, G.; Akdogan, T.; Åkesson, T. P. A.; Akimoto, G.; Akimov, A. V.; Akiyama, A.; Alam, M. S.; Alam, M. A.; Albert, J.; Albrand, S.; Aleksa, M.; Aleksandrov, I. N.; Alessandria, F.; Alexa, C.; Alexander, G.; Alexandre, G.; Alexopoulos, T.; Alhroob, M.; Aliev, M.; Alimonti, G.; Alison, J.; Aliyev, M.; Allbrooke, B. M. M.; Allport, P. P.; Allwood-Spiers, S. E.; Almond, J.; Aloisio, A.; Alon, R.; Alonso, A.; Alvarez Gonzalez, B.; Alviggi, M. G.; Amako, K.; Amaral, P.; Amelung, C.; Ammosov, V. V.; Amorim, A.; Amorós, G.; Amram, N.; Anastopoulos, C.; Ancu, L. S.; Andari, N.; Andeen, T.; Anders, C. F.; Anders, G.; Anderson, K. J.; Andreazza, A.; Andrei, V.; Andrieux, M.-L.; Anduaga, X. S.; Angerami, A.; Anghinolfi, F.; Anisenkov, A.; Anjos, N.; Annovi, A.; Antonaki, A.; Antonelli, M.; Antonov, A.; Antos, J.; Anulli, F.; Aoun, S.; Aperio Bella, L.; Apolle, R.; Arabidze, G.; Aracena, I.; Arai, Y.; Arce, A. T. H.; Arfaoui, S.; Arguin, J.-F.; Arik, E.; Arik, M.; Armbruster, A. J.; Arnaez, O.; Arnault, C.; Artamonov, A.; Artoni, G.; Arutinov, D.; Asai, S.; Asfandiyarov, R.; Ask, S.; Åsman, B.; Asquith, L.; Assamagan, K.; Astbury, A.; Astvatsatourov, A.; Aubert, B.; Auge, E.; Augsten, K.; Aurousseau, M.; Avolio, G.; Avramidou, R.; Axen, D.; Ay, C.; Azuelos, G.; Azuma, Y.; Baak, M. A.; Baccaglioni, G.; Bacci, C.; Bach, A. M.; Bachacou, H.; Bachas, K.; Backes, M.; Backhaus, M.; Badescu, E.; Bagnaia, P.; Bahinipati, S.; Bai, Y.; Bailey, D. C.; Bain, T.; Baines, J. T.; Baker, O. K.; Baker, M. D.; Baker, S.; Banas, E.; Banerjee, P.; Banerjee, Sw.; Banfi, D.; Bangert, A.; Bansal, V.; Bansil, H. S.; Barak, L.; Baranov, S. P.; Barashkou, A.; Barbaro Galtieri, A.; Barber, T.; Barberio, E. L.; Barberis, D.; Barbero, M.; Bardin, D. Y.; Barillari, T.; Barisonzi, M.; Barklow, T.; Barlow, N.; Barnett, B. M.; Barnett, R. M.; Baroncelli, A.; Barone, G.; Barr, A. J.; Barreiro, F.; Barreiro Guimarães da Costa, J.; Barrillon, P.; Bartoldus, R.; Barton, A. E.; Bartsch, V.; Bates, R. L.; Batkova, L.; Batley, J. R.; Battaglia, A.; Battistin, M.; Bauer, F.; Bawa, H. S.; Beale, S.; Beau, T.; Beauchemin, P. H.; Beccherle, R.; Bechtle, P.; Beck, H. P.; Becker, S.; Beckingham, M.; Becks, K. H.; Beddall, A. J.; Beddall, A.; Bedikian, S.; Bednyakov, V. A.; Bee, C. P.; Begel, M.; Behar Harpaz, S.; Behera, P. K.; Beimforde, M.; Belanger-Champagne, C.; Bell, P. J.; Bell, W. H.; Bella, G.; Bellagamba, L.; Bellina, F.; Bellomo, M.; Belloni, A.; Beloborodova, O.; Belotskiy, K.; Beltramello, O.; Ben Ami, S.; Benary, O.; Benchekroun, D.; Benchouk, C.; Bendel, M.; Benekos, N.; Benhammou, Y.; Benhar Noccioli, E.; Benitez Garcia, J. A.; Benjamin, D. P.; Benoit, M.; Bensinger, J. R.; Benslama, K.; Bentvelsen, S.; Berge, D.; Bergeaas Kuutmann, E.; Berger, N.; Berghaus, F.; Berglund, E.; Beringer, J.; Bernat, P.; Bernhard, R.; Bernius, C.; Berry, T.; Bertella, C.; Bertin, A.; Bertinelli, F.; Bertolucci, F.; Besana, M. I.; Besson, N.; Bethke, S.; Bhimji, W.; Bianchi, R. M.; Bianco, M.; Biebel, O.; Bieniek, S. P.; Bierwagen, K.; Biesiada, J.; Biglietti, M.; Bilokon, H.; Bindi, M.; Binet, S.; Bingul, A.; Bini, C.; Biscarat, C.; Bitenc, U.; Black, K. M.; Blair, R. E.; Blanchard, J.-B.; Blanchot, G.; Blazek, T.; Blocker, C.; Blocki, J.; Blondel, A.; Blum, W.; Blumenschein, U.; Bobbink, G. J.; Bobrovnikov, V. B.; Bocchetta, S. S.; Bocci, A.; Boddy, C. R.; Boehler, M.; Boek, J.; Boelaert, N.; Bogaerts, J. A.; Bogdanchikov, A.; Bogouch, A.; Bohm, C.; Boisvert, V.; Bold, T.; Boldea, V.; Bolnet, N. M.; Bona, M.; Bondarenko, V. G.; Bondioli, M.; Boonekamp, M.; Booth, C. N.; Bordoni, S.; Borer, C.; Borisov, A.; Borissov, G.; Borjanovic, I.; Borri, M.; Borroni, S.; Bortolotto, V.; Bos, K.; Boscherini, D.; Bosman, M.; Boterenbrood, H.; Botterill, D.; Bouchami, J.; Boudreau, J.; Bouhova-Thacker, E. V.; Boumediene, D.; Bourdarios, C.; Bousson, N.; Boveia, A.; Boyd, J.; Boyko, I. R.; Bozhko, N. I.; Bozovic-Jelisavcic, I.; Bracinik, J.; Braem, A.; Branchini, P.; Brandenburg, G. W.; Brandt, A.; Brandt, G.; Brandt, O.; Bratzler, U.; Brau, B.; Brau, J. E.; Braun, H. M.; Brelier, B.; Bremer, J.; Brenner, R.; Bressler, S.; Britton, D.; Brochu, F. M.; Brock, I.; Brock, R.; Brodbeck, T. J.; Brodet, E.; Broggi, F.; Bromberg, C.; Bronner, J.; Brooijmans, G.; Brooks, W. K.; Brown, G.; Brown, H.; Bruckman de Renstrom, P. A.; Bruncko, D.; Bruneliere, R.; Brunet, S.; Bruni, A.; Bruni, G.

2013-03-01

71

Performance of CMS hadron calorimeter timing and synchronization using test beam, cosmic ray, and LHC beam data  

E-print Network

This paper discusses the design and performance of the time measurement technique and of the synchronization systems of the CMS hadron calorimeter. Timing performance results are presented from the Cosmic Run At Four Tesla and LHC beam runs taken in the Autumn of 2008. For hadronic showers of energy greater than 100 GeV, the timing resolution is measured to be about 1.2 ns. The inter-channel synchronization is measured to be within 2 ns.

Chatrchyan, S; Sirunyan, A M; Adam, W; Arnold, B; Bergauer, H; Bergauer, T; Dragicevic, M; Eichberger, M; Erö, J; Friedl, M; Frühwirth, R; Ghete, V M; Hammer, J; Hänsel, S; Hoch, M; Hörmann, N; Hrubec, J; Jeitler, M; Kasieczka, G; Kastner, K; Krammer, M; Liko, D; Magrans de Abril, I; Mikulec, I; Mittermayr, F; Neuherz, B; Oberegger, M; Padrta, M; Pernicka, M; Rohringer, H; Schmid, S; Schöfbeck, R; Schreiner, T; Stark, R; Steininger, H; Strauss, J; Taurok, A; Teischinger, F; Themel, T; Uhl, D; Wagner, P; Waltenberger, W; Walzel, G; Widl, E; Wulz, C E; Chekhovsky, V; Dvornikov, O; Emeliantchik, I; Litomin, A; Makarenko, V; Marfin, I; Mossolov, V; Shumeiko, N; Solin, A; Stefanovitch, R; Suarez Gonzalez, J; Tikhonov, A; Fedorov, A; Karneyeu, A; Korzhik, M; Panov, V; Zuyeuski, R; Kuchinsky, P; Beaumont, W; Benucci, L; Cardaci, M; De Wolf, E A; Delmeire, E; Druzhkin, D; Hashemi, M; Janssen, X; Maes, T; Mucibello, L; Ochesanu, S; Rougny, R; Selvaggi, M; Van Haevermaet, H; Van Mechelen, P; Van Remortel, N; Adler, V; Beauceron, S; Blyweert, S; D'Hondt, J; De Weirdt, S; Devroede, O; Heyninck, J; Kalogeropoulos, A; Maes, J; Maes, M; Mozer, M U; Tavernier, S; Van Doninck, W; Van Mulders, P; Villella, I; Bouhali, O; Chabert, E C; Charaf, O; Clerbaux, B; De Lentdecker, G; Dero, V; Elgammal, S; Gay, A P R; Hammad, G H; Marage, P E; Rugovac, S; Vander Velde, C; Vanlaer, P; Wickens, J; Grunewald, M; Klein, B; Marinov, A; Ryckbosch, D; Thyssen, F; Tytgat, M; Vanelderen, L; Verwilligen, P; Basegmez, S; Bruno, G; Caudron, J; Delaere, C; Demin, P; Favart, D; Giammanco, A; Grégoire, G; Lemaitre, V; Militaru, O; Ovyn, S; Piotrzkowski, K; Quertenmont, L; Schul, N; Beliy, N; Daubie, E; Alves, G A; Pol, M E; Souza, M H G; Carvalho, W; De Jesus Damiao, D; De Oliveira Martins, C; Fonseca De Souza, S; Mundim, L; Oguri, V; Santoro, A; Silva Do Amaral, S M; Sznajder, A; Fernandez Perez Tomei, T R; Ferreira Dias, M A; Gregores, E M; Novaes, S F; Abadjiev, K; Anguelov, T; Damgov, J; Darmenov, N; Dimitrov, L; Genchev, V; Iaydjiev, P; Piperov, S; Stoykova, S; Sultanov, G; Trayanov, R; Vankov, I; Dimitrov, A; Dyulendarova, M; Kozhuharov, V; Litov, L; Marinova, E; Mateev, M; Pavlov, B; Petkov, P; Toteva, Z; Chen, G M; Chen, H S; Guan, W; Jiang, C H; Liang, D; Liu, B; Meng, X; Tao, J; Wang, J; Wang, Z; Xue, Z; Zhang, Z; Ban, Y; Cai, J; Ge, Y; Guo, S; Hu, Z; Mao, Y; Qian, S J; Teng, H; Zhu, B; Avila, C; Baquero Ruiz, M; Carrillo Montoya, C A; Gomez, A; Gomez Moreno, B; Ocampo Rios, A A; Osorio Oliveros, A F; Reyes Romero, D; Sanabria, J C; Godinovic, N; Lelas, K; Plestina, R; Polic, D; Puljak, I; Antunovic, Z; Dzelalija, M; Brigljevic, V; Duric, S; Kadija, K; Morovic, S; Fereos, R; Galanti, M; Mousa, J; Papadakis, A; Ptochos, F; Razis, P A; Tsiakkouri, D; Zinonos, Z; Hektor, A; Kadastik, M; Kannike, K; Müntel, M; Raidal, M; Rebane, L; Anttila, E; Czellar, S; Härkönen, J; Heikkinen, A; Karimäki, V; Kinnunen, R; Klem, J; Kortelainen, M J; Lampén, T; Lassila-Perini, K; Lehti, S; Lindén, T; Luukka, P; Mäenpää, T; Nysten, J; Tuominen, E; Tuominiemi, J; Ungaro, D; Wendland, L; Banzuzi, K; Korpela, A; Tuuva, T; Nedelec, P; Sillou, D; Besancon, M; Chipaux, R; Dejardin, M; Denegri, D; Descamps, J; Fabbro, B; Faure, J L; Ferri, F; Ganjour, S; Gentit, F X; Givernaud, A; Gras, P; Hamel de Monchenault, G; Jarry, P; Lemaire, M C; Locci, E; Malcles, J; Marionneau, M; Millischer, L; Rander, J; Rosowsky, A; Rousseau, D; Titov, M; Verrecchia, P; Baffioni, S; Bianchini, L; Bluj, M; Busson, P; Charlot, C; Dobrzynski, L; Granier de Cassagnac, R; Haguenauer, M; Miné, P; Paganini, P; Sirois, Y; Thiebaux, C; Zabi, A; Agram, J L; Besson, A; Bloch, D; Bodin, D; Brom, J M; Conte, E; Drouhin, F; Fontaine, J C; Gelé, D; Goerlach, U; Gross, L; Juillot, P; Le Bihan, A C; Patois, Y; Speck, J; Van Hove, P; Baty, C; Bedjidian, M; Blaha, J; Boudoul, G; Brun, H; Chanon, N; Chierici, R; Contardo, D; Depasse, P; Dupasquier, T; El Mamouni, H; Fassi, F; Fay, J; Gascon, S; Ille, B; Kurca, T; Le Grand, T; Lethuillier, M; Lumb, N; Mirabito, L; Perries, S; Vander Donckt, M; Verdier, P; Djaoshvili, N; Roinishvili, N; Roinishvili, V; Amaglobeli, N; Adolphi, R; Anagnostou, G; Brauer, R; Braunschweig, W; Edelhoff, M; Esser, H; Feld, L; Karpinski, W; Khomich, A; Klein, K; Mohr, N; Ostaptchouk, A; Pandoulas, D; Pierschel, G; Raupach, F; Schael, S; Schultz von Dratzig, A; Schwering, G; Sprenger, D; Thomas, M; Weber, M; Wittmer, B; Wlochal, M; Actis, O; Altenhöfer, G; Bender, W; Biallass, P; Erdmann, M; Fetchenhauer, G; Frangenheim, J; Hebbeker, T; Hilgers, G; Hinzmann, A; Hoepfner, K; Hof, C; Kirsch, M; Klimkovich, T; Kreuzer, P; Lanske, D; Merschmeyer, M; Meyer, A; Philipps, B; Pieta, H; Reithler, H; Schmitz, S A; Sonnenschein, L; Sowa, M; Steggemann, J; Szczesny, H; Teyssier, D; Zeidler, C; Bontenackels, M; Davids, M; Duda, M; Flügge, G

2010-01-01

72

Irradiation tests and expected performance of readout electronics of the ATLAS Hadronic Endcap calorimeter for the HL-LHC  

E-print Network

The readout electronics of the ATLAS Hadronic Endcap Calorimeter (HEC) will have to withstand an about 3-5 times larger radiation environment at the future high-luminosity LHC (HL-LHC) compared to the LHC design values. The radiation damages of the front-end electronics made in GaAs technology could significantly affect the HEC performance. Recent measurements of characteristics neutron and proton irradiated ASICs at room and LAr temperatures are reported, which allow an improved assessment of the expected degradation in HL-LHC conditions. These measurements are furthermore applied to simulations of the calorimeter performance. Results from replacement technologies, like Si CMOS, are also presented.

Ahmadov, F; The ATLAS collaboration

2014-01-01

73

Production and Test of the ATLAS Hadronic Calorimeter Digitizer S. Berglund, C. Bohm, K. Jon-And, J. Klereborn, M. Ramstedt and B. Selldn  

E-print Network

Production and Test of the ATLAS Hadronic Calorimeter Digitizer S. Berglund, C. Bohm, K. Jon-And, J the summer 2001. To be able to ensure full functionality and quality, a thorough test scheme was developed. All components are radiation tested before start of production. After mounting components all

74

TileDCS web system  

NASA Astrophysics Data System (ADS)

The web system described here provides features to monitor the ATLAS Detector Control System (DCS) acquired data. The DCS is responsible for overseeing the coherent and safe operation of the ATLAS experiment hardware. In the context of the Hadronic Tile Calorimeter Detector (TileCal), it controls the power supplies of the readout electronics acquiring voltages, currents, temperatures and coolant pressure measurements. The physics data taking requires the stable operation of the power sources. The TileDCS Web System retrieves automatically data and extracts the statistics for given periods of time. The mean and standard deviation outcomes are stored as XML files and are compared to preset thresholds. Further, a graphical representation of the TileCal cylinders indicates the state of the supply system of each detector drawer. Colors are designated for each kind of state. In this way problems are easier to find and the collaboration members can focus on them. The user selects a module and the system presents detailed information. It is possible to verify the statistics and generate charts of the parameters over the time. The TileDCS Web System also presents information about the power supplies latest status. One wedge is colored green whenever the system is on. Otherwise it is colored red. Furthermore, it is possible to perform customized analysis. It provides search interfaces where the user can set the module, parameters, and the time period of interest. The system also produces the output of the retrieved data as charts, XML files, CSV and ROOT files according to the user's choice.

Maidantchik, C.; Ferreira, F.; Grael, F.; Atlas Tile Calorimeter Community

2010-04-01

75

CMS hadron calorimeter front-end upgrade for SLHC phase I  

SciTech Connect

We present an upgrade plan for the CMS HCAL detector. The HCAL upgrade is required for the increased luminosity (3 * 10E34) of SLHC Phase I which is targeted for 2014. A key aspect of the HCAL upgrade is to add longitudinal segmentation to improve background rejection, energy resolution, and electron isolation at the L1 trigger. The increased segmentation is achieved by replacing the hybrid photodiodes (HPDs) with silicon PMTs (SIPMs). We plan to instrument each fiber of the calorimeter with an SIPM (103,000 total). We will then electrically sum outputs from selected SIPMs to form the longitudinal readout segments. In addition to having more longitudinal information, the upgrade plans include a new custom ADC with matched sensitivity and timing information. The increased data volume requires higher speed transmitters and the additional power dissipation for the readout electronics requires better thermal design, since much of the on-detector infrastructure (front-end electronics crates, cooling pipes, optical fiber plant, etc.) will remain the same. We will report on the preliminary designs for these upgraded systems, along with performance requirements and initial design studies.

Whitmore, Juliana; /Fermilab

2009-09-01

76

CMS Hadron Calorimeter front-end upgrade for SLHC Phase I  

NASA Astrophysics Data System (ADS)

We present an upgrade plan for the CMS HCAL detector. The HCAL upgrade is required for the increased luminosity (3×10 34) of SLHC Phase I, which is targeted for 2014. A key aspect of the HCAL upgrade is to add longitudinal segmentation to improve background rejection, energy resolution, and electron isolation at L1 trigger. The increased segmentation is achieved by replacing the hybrid photodiodes (HPDs) with silicon PMTs (SIPMs). We plan to instrument each fiber of the calorimeter with an SIPM (103,000 total). We will then electrically sum outputs from selected SIPMs to form the longitudinal readout segments. In addition to having more longitudinal information, the upgrade plans include a new custom ADC with matched sensitivity and timing information. The increased data volume requires higher speed transmitters. The additional power dissipation for the readout electronics requires better thermal design, since much of the on-detector infrastructure (front-end electronics crates, cooling pipes, optical fiber plant, etc.) will remain the same. We will report on the preliminary designs for these upgraded systems, along with performance requirements and initial design studies.

Whitmore, Juliana

2010-05-01

77

Light yield from a scintillator tile with embedded readout fibers  

SciTech Connect

We have studied the light yield in two straight fibers embedded in a square scintillator tile by means of computer simulation. The tile and fiber dimensions are taken in the ballpark of interest for the SDC main calorimeter. A fairly flat total response across the tile can be obtained. Important parameters to be controlled are identified.

Trost, H.J. [Argonne National Lab., IL (United States); Tonnison, J.I.; Barnes, V.E. [Purdue Univ., Lafayette, IN (United States). Dept. of Physics

1991-07-15

78

O the Optimization of a Lead Scintillator Compensating Calorimeter.  

NASA Astrophysics Data System (ADS)

A lead scintillator calorimeter was designed and tested by members of the ZEUS calorimeter group. The design of the TEST-36 calorimeter incorporated new ideas for the optimization of the performance of a hadron calorimeter. The development, testing, and the results are presented here.

Tsirou, Andromachi Leo

79

SPIROC: design and performances of a dedicated very front-end electronics for an ILC Analog Hadronic CALorimeter (AHCAL) prototype with SiPM read-out  

NASA Astrophysics Data System (ADS)

For the future e+ e- International Linear Collider (ILC) the ASIC SPIROC (Silicon Photomultiplier Integrated Read-Out Chip) was designed to read out the Analog Hadronic Calorimeter (AHCAL) equipped with Silicon Photomultiplier (SiPM). It is an evolution of the FLC_SiPM chip designed by the OMEGA group in 2005. SPIROC2 [1] was realized in AMS SiGe 0.35 ?m technology [2] and developed to match the requirements of large dynamic range, low noise, low consumption, high precision and large number of read-out channels. This ASIC is a very front-end read-out chip that integrates 36 self triggered channels with variable gain to achieve charge and time measurements. The charge measurement must be performed from 1 up to 2000 photo-electrons (p.e.) corresponding to 160 fC up to 320 pC for SiPM gain 106. The time measurement is performed with a coarse 12-bit counter related to the bunch crossing clock (up to 5 MHz) and a fine time ramp based on this clock (down to 200 ns) to achieve a resolution of 1 ns. An analog memory array with a depth of 16 for each channel is used to store the time information and the charge measurement. The analog memory content (time and charge) is digitized thanks to an internal 12-bit Wilkinson ADC. The data is then stored in a 4kbytes RAM. A complex digital part is necessary to manage all these features and to transfer the data to the DAQ. SPIROC2 is the second generation of the SPIROC ASIC family designed in 2008 by the OMEGA group. A very similar version (SPIROC2c) was submitted in February 2012 to improve the noise performance and also to integrate a new TDC (Time to Digital Converter) structure. This paper describes SPIROC2 and SPIROC2c ASICs and illustrates the main characteristics thank to a series of measurements.

Conforti Di Lorenzo, S.; Callier, S.; Fleury, J.; Dulucq, F.; De la Taille, C.; Chassard, G. Martin; Raux, L.; Seguin-Moreau, N.

2013-01-01

80

The TileCal Online Energy Estimation for the Next LHC Operation Period  

E-print Network

The ATLAS Tile Calorimeter (TileCal) is the detector used in the reconstruction of hadrons, jets, muons and missing transverse energy from the proton-proton collisions at the Large Hadron Collider (LHC). It covers the central part of the ATLAS detector (|?|read out by approximately 5,000 cells, with double readout channels. The signal provided by the readout electronics for each channel is digitized at 40 MHz and its amplitude is estimated by an optimal filtering algorithm, which expects a single signal with a well-defined shape. However, the LHC luminosity is expected to increase leading to signal pile-up that deforms the signal of interest. Due to limited resources, the current DSP-based hardware setup does not allow the implementation of sophisticated energy estimation methods that deal with the pile-up. Therefore, the technique to be employed for online energy estimation in TileCal for next LHC operation period must be based on fast filters such as the M...

Peralva, B S; The ATLAS collaboration

2014-01-01

81

Tiled microprocessors  

E-print Network

Current-day microprocessors have reached the point of diminishing returns due to inherent scalability limitations. This thesis examines the tiled microprocessor, a class of microprocessor which is physically scalable but ...

Taylor, Michael Bedford, 1975-

2007-01-01

82

CMS Hadronic Calorimeter Upgrade Studies  

E-print Network

Physics) 1.What is everything made of? 2 What holds it all together?2. What holds it all together? #12;New Anisotropy Probe data reveals that its contents include 4.6% atoms. · Dark matter comprises 23% of the universe. This matter, different from atoms, does not emit or absorb light. It has only been detected

Akgun, Ugur

83

Reliable and redundant FPGA based read-out design in the ATLAS TileCal Demonstrator  

E-print Network

The Tile Calorimeter at ATLAS is a hadron calorimeter based on steel plates and scintillating tiles read out by PMTs. The current read-out system uses standard ADCs and custom ASICs to digitize and temporarily store the data on the detector. However, only a subset of the data is actually read out to the counting room. The on-detector electronics will be replaced around 2023. To achieve the required reliability the upgraded system will be highly redundant. Here the ASICs will be replaced with Kintex-7 FPGAs from Xilinx. This, in addition to the use of multiple 10 Gbps optical read-out links, will allow a full read-out of all detector data. Due to the higher radiation levels expected when the beam luminosity is increased, opportunities for repairs will be less frequent. The circuitry and firmware must therefore be designed for sufficiently high reliability using redundancy and radiation tolerant components. Within a year, a hybrid demonstrator including the new read-out system will be installed in one slice of ...

Akerstedt, H; The ATLAS collaboration; Drake, Gary; Anderson, Kelby; Bohm, C; Bohm, Christian; Oreglia, Mark; Tang, Fukun

2014-01-01

84

Quartz fiber calorimetry and calorimeters  

E-print Network

Quartz fiber calorimetry is a technique the signal generation mechanism of which is based on the Cherenkov effect. In this article we try to give a comprehensive overview of the subject. We start with a general introduction to calorimetry where the basic elements that characterize the development of electromagnetic and hadronic showers are discussed. Then we describe in detail the operation principle and the properties of calorimeters equipped with quartz fibers. The main advantages of this type of calorimeters are the radiation hardness, the fast response and the compact detector dimensions, features that derive from the quartz material and the specific mechanism of operation. A section is devoted to presenting the quartz fiber calorimeters that have been built or planned to in various experiments to operate as centrality detectors, trigger detectors, luminosity monitors or general purpose very forward calorimeters.

G. Mavromanolakis

2004-12-20

85

Electromagnetic Calorimeter for Hades Experiment  

NASA Astrophysics Data System (ADS)

Electromagnetic calorimeter (ECAL) is being developed to complement the dilepton spectrometer HADES currently operating at GSI Darmstadt, Germany. ECAL will enable the HADES@FAIR experiment to measure data on neutral meson production in heavy ion collisions at the energy range of 2-10 A GeV on the beam of future accelerator SIS100@FAIR. The calorimeter will also improve the electron-hadron separation and will as well be used for the detection of photons from strange resonances in elementary and heavy ion reactions. Calorimeter modules constructed of lead glass Cherenkov counter, photomultiplier, HV divider and optical fiber are described in the detail. Two prototypes of novel front-end electronics based on TRB3 are presented. A dedicated LED based system being developed to monitor the stability of the calorimeter during beamtime is introduced as well.

Kugler, A.; Blume, C.; Czyžycki, W.; Epple, E.; Fabbietti, L.; Galatyuk, T.; Golubeva, M.; Guber, F.; Hlavá?, S.; Ivashkin, A.; Kajetanowic, M.; Kardan, B.; Koenig, W.; Lapidus, K.; Lisowski, E.; Pietraszko, J.; Reshetin, A.; Rost, A.; Salabura, P.; Sobolev, Y. G.; Svoboda, O.; Tlusty, P.; Traxler, M.

2014-06-01

86

Tessellations: Tiling  

NSDL National Science Digital Library

Presented by Utah State University, this interactive online math lesson teaches students about geometry and tessellations by "using regular and semi-regular tessellations to tile the plane." The java-based activity allows students to create their own tessellations using triangles, polygons, squares, and octagons. Instructions for individual practice are given on the right side of the screen, and students are allowed to work at their own pace. It's an excellent in-class or homework activity for any geometry classroom.

2008-02-15

87

Electromagnetic Calorimeter for HADES  

E-print Network

We propose to build the Electromagnetic calorimeter for the HADES di-lepton spectrometer. It will enable to measure the data on neutral meson production from nucleus-nucleus collisions, which are essential for interpretation of dilepton data, but are unknown in the energy range of planned experiments (2-10 GeV per nucleon). The calorimeter will improve the electron-hadron separation, and will be used for detection of photons from strange resonances in elementary and HI reactions. Detailed description of the detector layout, the support structure, the electronic readout and its performance studied via Monte Carlo simulations and series of dedicated test experiments is presented. The device will cover the total area of about 8 m^2 at polar angles between 12 and 45 degrees with almost full azimuthal coverage. The photon and electron energy resolution achieved in test experiments amounts to 5-6%/sqrt(E[GeV]) which is sufficient for the eta meson reconstruction with S/B ratio of 0.4% in Ni+Ni collisions at 8 AGeV. A purity of the identified leptons after the hadron rejection, resulting from simulations based on the test measurements, is better than 80% at momenta above 500 MeV/c, where time-of-flight cannot be used.

W. Czyzycki; E. Epple; L. Fabbietti; M. Golubeva; F. Guber; A. Ivashkin; M. Kajetanowicz; A. Krasa; F. Krizek; A. Kugler; K. Lapidus; E. Lisowski; J. Pietraszko; A. Reshetin; P. Salabura; Y. Sobolev; J. Stanislav; P. Tlusty; T. Torrieri; M. Traxler

2011-09-26

88

More iteration space tiling  

Microsoft Academic Search

Subdividing the iteration space of a loop into blocks or tiles with a fixed maximum size has several advantages. Tiles become a natural candidate as the unit of work for parallel task scheduling. Synchronization between processors can be done between tiles, reducing synchronization frequency (at some loss of potential parallelism). The shape and size of a tile can be optimized

Michael Wolfe

1989-01-01

89

Photon calorimeter  

DOEpatents

A photon calorimeter is provided that comprises a laminar substrate that is uniform in density and homogeneous in atomic composition. A plasma-sprayed coating, that is generally uniform in density and homogeneous in atomic composition within the proximity of planes that are parallel to the surfaces of the substrate, is applied to either one or both sides of the laminar substrate. The plasma-sprayed coatings may be very efficiently spectrally tailored in atomic number. Thermocouple measuring junctions, are positioned within the plasma-sprayed coatings. The calorimeter is rugged, inexpensive, and equilibrates in temperature very rapidly. 4 figs.

Chow, Tze-Show

1988-04-22

90

Bomb calorimeter  

SciTech Connect

A bomb calorimeter is presented in which a cartridge type specimen holder is provided in a fitted bomb casing so that a separate pressure seal is no longer required and the ease of making repeated tests is enhanced. The overall efficiency is also improved because of the central location of the specimen holder.

Bair, D.H.; Bell, F.H.

1981-02-03

91

Bomb calorimeter  

Microsoft Academic Search

A bomb calorimeter is presented in which a cartridge type specimen holder is provided in a fitted bomb casing so that a separate pressure seal is no longer required and the ease of making repeated tests is enhanced. The overall efficiency is also improved because of the central location of the specimen holder.

D. H. Bair; F. H. Bell

1981-01-01

92

Optimal Orthogonal Tiling  

Microsoft Academic Search

Iteration space tiling is a common strategy used by parallelizing compilers and in performance tuning of parallel codes. We\\u000a address the problem of determining the tile size that minimizes the total execution time. We restrict our attention to orthogonal tiling—uniform dependency programs with (hyper) parallelepiped shaped iteration domains which can be tiled with hyperplanes parallel\\u000a to the domain boundaries. Our

Rumen Andonov; Sanjay V. Rajopadhye; Nicola Yanev

1998-01-01

93

Handmade Tile Mosaics  

ERIC Educational Resources Information Center

Just like the classroom, children's outdoor environments should be filled with artistic creations that add sparkle and imagination to the space. One of the author's favorite ways to add art to the outdoors is by installing a mosaic mural of child-made tiles. The process of making the tiles is fun for all; each tile is a charming work of art in…

Keeler, Rusty

2007-01-01

94

Internal Ceramic Wall Tiling  

Microsoft Academic Search

This paper surveys the causes of failures in ceramic wall tiling. It is concluded that the physical properties of tiles should be carefully analysed at the time of their selection, and quality rather than colour and texture should be the main selection criterion.Recognition and understanding of varying properties of the different background materials to which the tiles are attached is

Thomas E. Uher

1984-01-01

95

Isoperimetric Pentagonal Tilings  

E-print Network

We identify least-perimeter unit-area tilings of the plane by convex pentagons, namely tilings by Cairo and Prismatic pentagons, find infinitely many, and prove that they minimize perimeter among tilings by convex polygons with at most five sides.

Chung, Ping Ngai; Li, Yifei; Mara, Michael; Morgan, Frank; Plata, Isamar Rosa; Shah, Niralee; Vieira, Luis Sordo; Wikner, Elena

2011-01-01

96

Analog Readout and Digitizing System for ATLAS TileCal Demonstrator  

E-print Network

The TileCal Demonstrator is a prototype for a future upgrade to the ATLAS hadron calorimeter when the Large Hadron Collider increases luminosity in year 2023 (HL-LHC). It will be used for functionality and performance tests. The Demonstrator has 48 channels of upgraded readout and digitizing electronics and a new digital trigger capability, but is backwards-compatible with the present detector system insofar as it also provides analog trigger signals. The Demonstrator is comprised of 4 identical mechanical mini-drawers, each equipped with up to 12 photomultipliers (PMTs). The on-detector electronics includes 45 Front-End Boards, each serving an individual PMT; 4 Main Boards, each to control and digitize up to 12 PMT signals, and 4 corresponding high-speed Daughter Boards serving as data hubs between on-detector and off-detector electronics. The Demonstrator is fully compatible with the present system, accepting ATLAS triggers, timing and slow control commands for the data acquisition, detector control, and de...

Tang, F; The ATLAS collaboration

2014-01-01

97

Upgrade Analog Readout and Digitizing System for ATLAS TileCal Demonstrator  

E-print Network

The TileCal Demonstrator is a prototype for a future upgrade to the ATLAS hadron calorimeter when the Large Hadron Collider increases luminosity in year 2023 (HL-LHC). It will be used for functionality and performance tests. The Demonstrator has 48 channels of upgraded readout and digitizing electronics and a new digital trigger capability, but is backwards-compatible with the present detector system insofar as it also provides analog trigger signals. The Demonstrator is comprised of 4 identical mechanical mini-drawers, each equipped with up to 12 photomultipliers (PMTs). The on-detector electronics includes 45 Front-End Boards, each serving an individual PMT; 4 Main Boards, each to control and digitize up to 12 PMT signals, and 4 corresponding high-speed Daughter Boards serving as data hubs between on-detector and off-detector electronics. The Demonstrator is fully compatible with the present system, accepting ATLAS triggers, timing and slow control commands for the data acquisition, detector control, and de...

Tang, F; The ATLAS collaboration; Anderson, K; Bohm, C; Hildebrand, K; Muschter, S; Oreglia, M

2014-01-01

98

Electronics of LHCb calorimeter monitoring system  

E-print Network

All calorimeter sub-detectors in LHCb, the Scintillator Pad Detector (SPD), the Preshower detector (PS), the Electromagnetic Calorimeter (ECAL) and the Hadron Calorimeter (HCAL) are equipped with the Hamamatsu photomultiplier tubes (PMT) as devices for light to electrical signal conversion [1]. The PMT gain behaviour is not stable in a time, due to changes in the load current and due to ageing. The calorimeter light emitting diode (LED) monitoring system has been developed to monitor the PMT gain over time during data taking. Furthermore the system will play an important role during the detector commissioning and during LHC machine stops, in order to perform tests of the PMTs, cables and FE boards and measurements of relative time alignment. The aim of the paper is to describe the LED monitoring system architecture, some technical details of the electronics implementation based on radiation tolerant components and to summarize the system performance.

Konoplyannikov, A

2008-01-01

99

Overview of the LHCb calorimeters  

NASA Astrophysics Data System (ADS)

LHCb, one of the four LHC experiments, is dedicated to the study of CP violation and rare decays in the B meson sector. It aims at completing the understanding of the quark flavor physics and at revealing signs of new physics beyond the standard model. The goal of the LHCb calorimeter is twofold. On the one hand, the calorimeter system has to provide a fast response for the first level trigger (L0) on the nature of the meson decay. Thus, the scintillator pad detector and the preshower provide a good ?/ charged particle and electron/ ?0 separation and the electromagnetic and hadronic calorimeters give a fast transverse energy determination. On the other hand, it provides offline precision measurements and particle identification. The calorimeter system consists of four sub-detectors. They are described in the first section, emphasising the technical choices and the similarities among those components. The second part concerns the monitoring and calibration tools and procedures that will be applied to have a satisfactory running of the detector.

Machefert, F.; Martens, A.

2010-05-01

100

Physics with the ALICE Electromagnetic Calorimeter  

E-print Network

I will present physics measurements which are achievable in the ALICE experiment at the LHC through the inclusion of a new electromagnetic calorimeter. I will focus on jet measurements in proton proton and heavy ion collisions. Detailed simulations have been performed on jet reconstruction, jet triggering, heavy flavor jet reconstruction through electron identification, gamma-jet reconstruction and the measurements of identified hadrons and resonances in jets. I will show the physics capabilities which are made possible through the combination of calorimeter information with the other detector components in ALICE.

Rene Bellwied; for the ALICE Collaboration

2009-07-17

101

Imaging hadron calorimetry for future Lepton Colliders  

NASA Astrophysics Data System (ADS)

To fully exploit the physics potential of a future Lepton Collider requires detectors with unprecedented jet energy and dijet-mass resolution. To meet these challenges, detectors optimized for the application of Particle Flow Algorithms (PFAs) are being designed and developed. The application of PFAs, in turn, requires calorimeters with very fine segmentation of the readout, so-called imaging calorimeters. This talk reviews progress in imaging hadron calorimetry as it is being developed for implementation in a detector at a future Lepton Collider. Recent results from the large prototypes built by the CALICE Collaboration, such as the Scintillator Analog Hadron Calorimeter (AHCAL) and the Digital Hadron Calorimeters (DHCAL and SDHCAL) are being presented. In addition, various R&D efforts beyond the present prototypes are being discussed.

Repond, José

2013-12-01

102

Imaging Calorimeter: What Have We Learned So Far  

NASA Astrophysics Data System (ADS)

Particle Flow Algorithms (PFAs) have been applied to existing detectors to improve the measurement of hadronic jets in colliding beam experiments. For future experiments, such as a TeV lepton collider, detector concepts optimized for the application of PFAs are being developed. These concepts require so-called imaging calorimeters, with unprecedented granularity. We will review the various recent developments of such highly granular calorimeters.

Xia, Lei

103

Calorimeter Electronics Jim Pilcher  

E-print Network

(iron/scintillator), air Can be very large (esp. for neutrinos and cosmic rays) In many calorimeters optical EM radiation Calorimeter Detect Cerenkov radiation from interactions of ~ 106 eV neutrinos Also calorimeters in Double Introduction Auger observatory (to E ~ 1021 ev) Detect fluorescence radiation from air showers induced

104

Potential physics measurement with ALICE electromagnetic calorimeters  

NASA Astrophysics Data System (ADS)

We present the two electromagnetic calorimeters of the ALICE (A Large Ion Collider Experiment) experiment at LHC (Large Hadron Collider). One is the high-resolution PHOton Spectrometer (PHOS) made of lead tungsten crystals and the other is the ElectroMagnetic Calorimeter (EMCal), a Lead-Scintillator sampling calorimeter. They are dedicated to the measurement and identification of direct photons, light neutral mesons such as ?0, ? and ?(782), and jets emitted in proton-proton and heavy-ion collisions at the LHC energies. The PHOS is capable of precisely detecting photons with momentum range between 0.1 GeV/c and 100 GeV/c and the EMCal can extend the prompt photon and light neutral meson momentum measurement beyond 200 GeV/c. The objective of the study is to explore the physics of strongly interacting QCD matter under extreme conditions of energy density.

ALICE Collaboration; Zhou, D. C.; Mao, Y. X.; Wan, R. Z.; Schutz, Y.; Yin, Z.-B.; Wang, Y. P.; Ma, K.; Conesa, G.; Kharlov, Y.; Wang, M. L.; Zhu, X. R.; Yin, X.; Cai, X.; ALICE Collaboration

2010-03-01

105

Clustering of Hadronic Showers with a Structural Algorithm  

SciTech Connect

The internal structure of hadronic showers can be resolved in a high-granularity calorimeter. This structure is described in terms of simple components and an algorithm for reconstruction of hadronic clusters using these components is presented. Results from applying this algorithm to simulated hadronic Z-pole events in the SiD concept are discussed.

Charles, M.J.; /SLAC

2005-12-13

106

Dimers, Tilings and Trees  

E-print Network

Generalizing results of Temperley, Brooks, Smith, Stone and Tutte and others we describe a natural equivalence between three planar objects: weighted bipartite planar graphs; planar Markov chains; and tilings with convex polygons. This equivalence provides a measure-preserving bijection between dimer coverings of a weighted bipartite planar graph and spanning trees on the corresponding Markov chain. The tilings correspond to harmonic functions on the Markov chain and to ``discrete analytic functions'' on the bipartite graph. The equivalence is extended to infinite periodic graphs, and we classify the resulting ``almost periodic'' tilings and harmonic functions.

Richard Kenyon; Scott Sheffield

2003-10-13

107

First Years of Running for the LHCb Calorimeter System  

E-print Network

The calorimeter system of LHCb is subdivided into four sub-detectors which ensure its longitudinal segmentation: a Scintillator Pad Detector (SPD) followed by a Preshower (PS) and then an electromagnetic (ECAL) an hadronic (HCAL) calorimeter. After a description of these detectors, procedures developed to calibrate their response are discussed together with the degradation of response observed due to the harsh conditions (hard radiation and high current). First results on the calorimeter performance over the two most productive years of physics data taking, 2011 and 2012 are given.

Pascal Perret; for the LHCb Collaboration

2014-07-16

108

CALICE Si\\/W electromagnetic Calorimeter  

Microsoft Academic Search

The CALICE prototype for a Si\\/W electromagnetic calorimeter has been tested in large scale test beams. Several million events with electrons and hadrons of different energies and impact angles have been recorded. The energy resolution has been measured to be (16.6 +- 0.1)%\\/sqrt(E(GeV)) for the stochastic and (1.1 +- 0.1)% for the constant term with a linearity within the 1%

Marcel Reinhard

2009-01-01

109

A fractal version of the pinwheel tiling  

E-print Network

We introduce a fractal version of the pinwheel substitution tiling. There are thirteen basic prototiles, all of which have fractal boundaries. These tiles, along with their reflections and rotations, create a tiling space which is mutually locally derivable from the pinwheel tiling space. Interesting rotational properties, symmetries, and relative tile frequency are discussed for the tiling space associated with the fractal pinwheel tiling.

Natalie Priebe Frank; Michael F. Whittaker

2010-01-13

110

Repairing Thermal Tiles  

NASA Technical Reports Server (NTRS)

Small chips and depression in surfaces of surface insulation tiles repaired using Ludox colloidal silica solution and silica powder. No waiting time necessary between mixing filler and using it. Patch cures quickly without heat being applied.

Mccain, C. R., Jr.; Feiler, C. W.

1984-01-01

111

Tiles and Colors  

NASA Astrophysics Data System (ADS)

Tiling models are classical statistical models in which different geometric shapes, the tiles, are packed together such that they cover space completely. In this paper we discuss a class of two-dimensional tiling models in which the tiles are rectangles and isosceles triangles. Some of these models have been solved recently by means of Bethe Ansatz. We discuss the question why only these models in a larger family are solvable, and we search for the Yang-Baxter structure behind their integrability. In this quest we find the Bethe Ansatz solution of the problem of coloring the edges of the square lattice in four colors, such that edges of the same color never meet in the same vertex.

Nienhuis, Bernard

2001-02-01

112

On-Detector Electronics for the ATLAS TileCal Demonstrator  

E-print Network

In the major upgrade of the LHC and its detectors around year 2023 the beam energy and luminosity will increase significantly. For TileCal, the hadron calorimeter in ATLAS, most of the on-detector and off-detector electronics will be replaced. A new design has been proposed with some alternative solutions for some of the parts. To gain experience with this design, a demonstrator project is on-going aiming at inserting a prototype module in ATLAS this summer or in the next possible shut-down. A caveat is that it must be able to operate seamlessly with the present system. This together with test beam studies will help to finalize the design. The on-detector part of the demonstrator electronics contains five parts: new front-end boards, digitizer boards with a link daughter board, a programmable high voltage power supply and a redundant low voltage power supply. Apart from improved performance reliability is a main concern. This will be achieved by increased modularity so that the consequences of a complete fail...

Muschter, Steffen Lothar; The ATLAS collaboration; Anderson, Kelby; Bohm, Christian; Drake, Gary; Oreglia, Mark; Paramonov, Alexander; Tang, Fukun

2014-01-01

113

Monitoring light source for CMS lead tungstate crystal calorimeter at LHC  

Microsoft Academic Search

Light monitoring will serve as an intercalibration for Compact Muon Solenoid (CMS) lead tungstate crystals in situ at the Large Hadronic Collider, which is crucial for maintaining crystal calorimeter's subpercent constant term in the energy resolution. This paper presents the design of the CMS electromagnetic calorimeter monitoring light source and high-level distribution system. The correlations between variations of the light

Liyuan Y. Zhang; Kejun J. Zhu; Ren-Yuan Zhu; Duncan T. Liu

2001-01-01

114

The CMS barrel calorimeter response to particle beams from 2 to 350 GeV\\/ c  

Microsoft Academic Search

The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum\\u000a range from 2 to 350 GeV\\/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied.\\u000a These tests, carried out at the H2 beam-line at CERN, provide a wealth of

S. Abdullin; V. Abramov; B. Acharya; N. Adam; M. Adams; P. Adzic; N. Akchurin; U. Akgun; E. Albayrak; R. Alemany-Fernandez; N. Almeida; G. Anagnostou; D. Andelin; E. W. Anderson; M. Anfreville; I. Anicin; G. Antchev; Z. Antunovic; R. Arcidiacono; M. W. Arenton; E. Auffray; S. Argiro; A. Askew; O. Atramentov; S. Ayan; M. Arcidy; S. Aydin; T. Aziz; M. Baarmand; K. Babich; S. Baccaro; D. Baden; S. Baffioni; M. N. Bakirci; M. Balazs; Sud. Banerjee; Sun. Banerjee; R. Bard; D. Barge; V. Barnes; D. Barney; L. Barone; A. Bartoloni; C. Baty; H. Bawa; G. Baiatian; D. Bandurin; S. Beauceron; K. W. Bell; G. Bencze; R. Benetta; M. Bercher; S. Beri; C. Bernet; L. Berntzon; U. Berthon; M. Besancon; B. Betev; R. Beuselinck; V. Bhatnagar; A. Bhatti; C. Biino; J. Blaha; P. Bloch; S. Blyth; A. Bodek; A. Bornheim; S. Bose; T. Bose; J. Bourotte; A. M. Brett; R. M. Brown; D. Britton; H. Budd; M. Buehler; K. Burchesky; P. Busson; B. Camanzi; T. Camporesi; K. Cankoçak; K. Carrell; E. Carrera; N. Cartiglia; F. Cavallari; S. Cerci; M. Cerutti; P. Chang; Y. H. Chang; C. Charlot; E. A. Chen; W. T. Chen; Z. Chen; S. Chendvankar; R. Chipaux; B. C. Choudhary; R. K. Choudhury; Y. Chung; W. Clarida; D. J. A. Cockerill; C. Combaret; S. Conetti; F. Cossutti; B. Cox; L. Cremaldi; P. Cushman; D. G. Cussans; I. Dafinei; J. Damgov; G. Daskalakis; G. Davatz; A. David; P. de Barbaro; P. Debbins; K. Deiters; M. Dejardin; M. Djordjevic; M. Deliomeroglu; D. Del Re; A. Demianov; A. De Min; D. Denegri; P. Depasse; T. de Visser; J. Descamps; P. V. Deshpande; J. Diaz; M. Diemoz; E. Di Marco; L. Dimitrov; G. Dissertori; M. Dittmar; L. Djambazov; L. Dobrzynski; S. Drndarevic; J. E. Duboscq; S. Dugad; I. Dumanoglu; F. Duru; D. Dutta; M. Dzelalija; I. Efthymiopoulos; J. Elias; A. Elliott-Peisert; H. El Mamouni; D. Elvira; I. Emeliantchik; S. Eno; A. Ershov; S. Erturk; S. Esen; E. Eskut; I. Evangelou; D. L. Evans; B. Fabbro; J. L. Faure; J. Fay; A. Fenyvesi; F. Ferri; W. Fisher; P. S. Flower; D. Franci; G. Franzoni; J. Freeman; K. Freudenreich; W. Funk; S. Ganjour; C. Gargiulo; S. Gascon; M. Gataullin; V. Gaultney; H. Gamsizkan; V. Gavrilov; Y. Geerebaert; V. Genchev; F. X. Gentit; D. Gerbaudo; Y. Gershtein; A. Ghezzi; M. D. Ghodgaonkar; J. Gilly; A. Givernaud; S. Gleyzer; S. Gninenko; A. Go; B. Gobbo; N. Godinovic; N. Golubev; I. Golutvin; P. Goncharov; D. Gong; P. Govoni; N. Grant; P. Gras; T. Grassi; D. Green; R. J. S. Greenhalgh; A. Gribushin; B. Grinev; J. P. Guillaud; A. Gurtu; E. Gülmez; K. Gümüs; T. Haelen; S. Hagopian; V. Hagopian; M. Haguenauer; V. Halyo; M. Hansen; M. Hashemi; J. Hauptman; E. Hazen; H. F. Heath; A. Heering; A. Heister; B. Heltsley; J. A. Hill; W. Hintz; R. Hirosky; P. R. Hobson; A. Honma; G. W. S. Hou; Y. Hsiung; A. Hunt; M. Husejko; B. Ille; N. Ilyina; R. Imlay; D. Ingram; Q. Ingram; E. Isiksal; P. Jarry; C. Jarvis; C. Jeong; C. Jessop; K. Johnson; J. Jones; D. Jovanovic; K. Kaadze; V. Kachanov; V. Kaftanov; S. Kailas; V. Kalagin; A. Kalinin; S. Kalmani; D. Karmgard; S. K. Kataria; M. Kaur; M. Kaya; O. Kaya; A. Kayis-Topaksu; R. Kellogg; B. W. Kennedy; A. Khmelnikov; H. Kim; I. Kisselevich; K. Kloukinas; O. Kodolova; J. Kohli; P. Kokkas; T. Kolberg; V. Kolossov; A. Korablev; Y. Korneev; I. Kosarev; L. Kramer; N. Krasnikov; A. Krinitsyn; A. Krokhotin; D. Krpic; V. Kryshkin; Y. Kubota; A. Kubrik; S. Kuleshov; A. Kumar; P. Kumar; S. Kunori; C. M. Kuo; P. Kurt; P. Kyberd; A. Kyriakis; A. Laasanen; V. Ladygin; E. Laird; G. Landsberg; A. Laszlo; C. Lawlor; D. Lazic; M. Lebeau; P. Lecomte; P. Lecoq; A. Ledovskoy; S.-W. Lee; G. Leshev; M. Lethuillier; L. Levchuk; S. W. Lin; W. Lin; S. Linn; A. L. Lintern; V. Litvine; D. Litvintsev; L. Litov; L. Lobolo; E. Locci; A. B. Lodge; E. Longo; D. Loukas; S. Los; V. Lubinsky; P. D. Luckey; V. Lukanin; W. Lustermann; C. Lynch; Y. Ma; E. Machado; H. Mahlke-Krueger; M. Maity; G. Majumder; M. Malberti; J. Malclès; D. Maletic; I. Mandjavidze; J. Mans; N. Manthos; Y. Maravin; C. Marchica; N. Marinelli; A. Markou; C. Markou; D. Marlow; P. Markowitz; M. Marone; G. Martinez; H. Mathez; V. Matveev; C. Mavrommatis; G. Maurelli; K. Mazumdar; P. Meridiani; J. P. Merlo; H. Mermerkaya; G. Mescheryakov; A. Mestvirishvili; V. Mikhailin; P. Milenovic; M. Miller; G. Milleret; P. Miné; A. Moeller; M. Mohammadi-Najafabadi; A. K. Mohanty; P. Moissenz; N. Mondal; F. Moortgat; V. Mossolov; M. Mur; P. Musella; Y. Musienko; P. Nagaraj; A. Nardulli; J. Nash; P. Nedelec; P. Negri; H. B. Newman; A. Nikitenko; E. Norbeck; F. Nessi-Tedaldi; M. M. Obertino; J. Olson; Y. Onel; G. Onengut; G. Organtini; T. Orimoto; C. Ozkan; H. Ozkurt; S. Ozkorucuklu; F. Ozok; M. Paganoni; P. Paganini; S. Paktinat; A. Pal; A. Palma; B. Panev; L. Pant; A. Papadakis; I. Papadakis; I. Papadopoulos; R. Paramatti; P. Parracho; N. Pastrone; M. Patil; J. R. Patterson; F. Pauss; A. Penzo; E. Petrakou; S. Petrushanko; A. Petrosyan

2009-01-01

115

The KLOE electromagnetic calorimeter  

NASA Astrophysics Data System (ADS)

The KLOE calorimeter is a fine lead-scintillating fiber sampling calorimeter. We describe in the following the calibration procedures and the calorimeter performances obtained after 3 years of data taking. We get an energy resolution for electromagnetic showers of 5.4%/ E (GeV) and a time resolution of 56 ps/ E (GeV). We also present a measurement of efficiency for low-energy photons.

Adinolfi, M.; Ambrosino, F.; Antonelli, A.; Antonelli, M.; Anulli, F.; Barbiellini, G.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocci, V.; Bossi, F.; Branchini, P.; Cabibbo, G.; Caloi, R.; Campana, P.; Casarsa, M.; Cataldi, G.; Ceradini, F.; Cervelli, F.; Ciambrone, P.; De Lucia, E.; De Simone, P.; De Zorzi, G.; Dell'Agnello, S.; Denig, A.; Di Domenico, A.; Di Donato, C.; Di Falco, S.; Doria, A.; Erriquez, O.; Farilla, A.; Ferrari, A.; Ferrer, M. L.; Finocchiaro, G.; Forti, C.; Franceschi, A.; Franzini, P.; Gao, M. L.; Gatti, C.; Gauzzi, P.; Giannasi, A.; Giovannella, S.; Graziani, E.; Han, H. G.; Han, S. W.; Huang, X.; Incagli, M.; Ingrosso, L.; Keeble, L.; Kim, W.; Kuo, C.; Lanfranchi, G.; Lee-Franzini, J.; Lomtadze, T.; Mao, C. S.; Martemianov, M.; Mei, W.; Messi, R.; Miscetti, S.; Moccia, S.; Moulson, M.; Müller, S.; Murtas, F.; Pacciani, L.; Palomba, M.; Palutan, M.; Pasqualucci, E.; Passalacqua, L.; Passeri, A.; Picca, D.; Pirozzi, G.; Pontecorvo, L.; Primavera, M.; Santangelo, P.; Santovetti, E.; Saracino, G.; Schamberger, R. D.; Sciascia, B.; Scuri, F.; Sfiligoi, I.; Silano, P.; Spadaro, T.; Spiriti, E.; Tortora, L.; Valente, P.; Valeriani, B.; Venanzoni, G.; Ventura, A.; Wölfle, S.; Wu, Y.; Xie, Y. G.; Zema, P. F.; Zhang, C. D.; Zhang, J. Q.; Zhao, P. P.

2002-11-01

116

Tiled texture synthesis  

E-print Network

TILED TEXTURE SYNTHESIS A Thesis by LORI ANNE GREEN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 2003 Major Subject: Visualization... Sciences TILED TEXTURE SYNTHESIS A Thesis by LORI ANNE GREEN Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: Ergun Akleman (Chair of Committee) John Keyser...

Green, Lori Anne

2004-09-30

117

Texture mapping using tiled textures  

E-print Network

in the resultant texturing. The method involves organizing a set of square texture tiles that satisfy specific boundary conditions into one texture image file which is called a tiled texture. Based on the tiled textures, we have developed an extremely simple...

Kaur, Avneet

2004-09-30

118

Hadron hadron collider group  

SciTech Connect

The objective of this group was to make a rough assessment of the characteristics of a hadron-hadron collider which could make it possible to study the 1 TeV mass scale. Since there is very little theoretical guidance for the type of experimental measurements which could illuminate this mass scale, we chose to extend the types of experiments which have been done at the ISR, and which are in progress at the SPS collider to these higher energies.

Palmer, R.; Peoples, J.; Ankenbrandt, C.

1982-01-01

119

Molecular random tilings as glasses  

PubMed Central

We have recently shown that p-terphenyl-3,5,3?,5?-tetracarboxylic acid adsorbed on graphite self-assembles into a two-dimensional rhombus random tiling. This tiling is close to ideal, displaying long-range correlations punctuated by sparse localized tiling defects. In this article we explore the analogy between dynamic arrest in this type of random tilings and that of structural glasses. We show that the structural relaxation of these systems is via the propagation–reaction of tiling defects, giving rise to dynamic heterogeneity. We study the scaling properties of the dynamics and discuss connections with kinetically constrained models of glasses. PMID:19720990

Garrahan, Juan P.; Stannard, Andrew; Blunt, Matthew O.; Beton, Peter H.

2009-01-01

120

The PHENIX electromagnetic calorimeter  

SciTech Connect

The main features of the Phenix EM calorimeter are presented. This a Pb/scintillator calorimeter with ``shish-kebab`` fiber readout, designed for low energy electron and photon measurements. Prototype calorimeters have been built with longitudinal segmentation, {approximately} 100 psec time of flight resolution and 8% energy resolution at 1GeV/c. The laser based monitoring system which has been incorporated into large scale prototypes is described. The dependence of light yield on fiber choice and scintillator surface preparation has been studied.

Kistenev, E.; White, S. [Brookhaven National Lab., Upton, NY (United States); Belikov, S.; Kochetkov, V. [Institut Fiziki Vysokikh Ehnergij, Protvino (Russian Federation)

1993-12-31

121

CDF calorimeter and its upgrade  

SciTech Connect

The CDF calorimeter systems are briefly reviewed with an emphasis on the calibration and the performance of the central electromagnetic calorimeter. Several physics analyses where the calorimetry plays an important role are discussed. The present gas calorimeter will be upgraded in accord with the collider upgrade. The new system is a scintillator-based calorimeter with optical fiber readout. A status of the CDF calorimeter upgrade project is also described.

Seiya, Y. [Univ. of Tsukuba, Ibaraki-ken (Japan). Institute of Physics

1995-01-01

122

Results on damage induced by high-energy protons in LYSO calorimeter crystals  

NASA Astrophysics Data System (ADS)

Lutetium-Yttrium Orthosilicate doped with Cerium (LYSO), as a bright scintillating crystal, is a candidate for calorimetry applications in strong ionising-radiation fields and large high-energy hadron fluences are expected at the CERN Large Hadron Collider after the planned High-Luminosity upgrade. There, proton-proton collisions will produce fast hadron fluences up to ~5×1014cm-2 in the large-rapidity regions of the calorimeters.

Dissertori, G.; Luckey, D.; Nessi-Tedaldi, F.; Pauss, F.; Quittnat, M.; Wallny, R.; Glaser, M.

2014-05-01

123

RD1 scintillating fibre calorimeter studies  

NASA Astrophysics Data System (ADS)

A report is given of the experimental studies on lead/fibre calorimetry of the RD1 research and development project. To match the LHC physics requirements for a highly segmented and accurate electromagnetic energy measurement and for an acceptable hadronic performance, the 1992 RD1 program opted for longitudinally segmented calorimeter prototypes. The electromagnetic prototypes comprised 4 × 4 cm 2 cells with a high sampling fraction of 1.8:1. Coarse hadronic prototypes were constructed using 1 mm fibres inserted in 3 mm diameter plastic tubes. The production procedures are discussed and test beam results are presented. Reports are also given on calibration studies, on radiation hardness studies and on the development and tests of new light detectors.

Linssen, L.; RD1 Collaboration

1994-04-01

124

Covering the Plane with Rep-Tiles.  

ERIC Educational Resources Information Center

Presents an activity in which students use geometric figures, rep-tiles, to design a tile floor. Rep-tiles are geometric figures of which copies can fit together to form a larger similar figure. Includes reproducible student worksheet. (MKR)

Fosnaugh, Linda S.; Harrell, Marvin E.

1996-01-01

125

Magnetically Coupled Calorimeters  

NASA Technical Reports Server (NTRS)

Calorimeters that utilize the temperature sensitivity of magnetism have been under development for over 20 years. They have targeted a variety of different applications that require very high resolution spectroscopy. I will describe the properties of this sensor technology that distinguish it from other low temperature detectors and emphasize the types of application to which they appear best suited. I will review what has been learned so far about the best materials, geometries, and read-out amplifiers and our understanding of the measured performance and theoretical limits. I will introduce some of the applications where magnetic calorimeters are being used and also where they are in development for future experiments. So far, most magnetic calorimeter research has concentrated on the use of paramagnets to provide temperature sensitivity; recent studies have also focused on magnetically coupled calorimeters that utilize the diamagnetic response of superconductors. I will present some of the highlights of this research, and contrast the properties of the two magnetically coupled calorimeter types.

Bandler, Simon

2011-01-01

126

Performance of Glast Calorimeter  

NASA Astrophysics Data System (ADS)

The GLAST Large Area Telescope to be launched in 2006 is dedicated to gamma-ray astronomy from 20 MeV to 300 GeV. Its calorimeter consists of 16 modules of 8 layers of 12 CsI(Tl) crystals arranged in an hodoscopic array. Each module is placed under a silicon tracker using tungsten converters. The calorimeter is only 8.5X0 thick. Therefore, depending on the energy regime, the shower containment is rather poor and corrections need to be applied. We present here the correction algorithms as well as the performances of GLAST calorimeter in terms of energy, position and direction, based on detailed simulations of the instrument and beam tests results.

Terrier, R.; John, M.; Djannati-Atai, A.; Chekhtman, A.; Grove, J. E.; Johnson, W. N.

2002-01-01

127

Top quark pair production and calorimeter energy resolution studies at a future collider experiment  

E-print Network

This thesis is focused on detector concepts and analyses investigated at a future linear electron positron collider. For precision measurements at such a collider, the CALICE collaboration develops imaging calorimeters, which are characterized by a fine granularity. CALICE has constructed prototypes of several design options for electromagnetic and hadronic calorimeters and has successfully operated these detectors during combined test beam programs at DESY, CERN and Fermilab. To improve the hadronic energy reconstruction and energy resolution of a hadron calorimeter prototype with analog readout three software compensation techniques are presented in this thesis, of which one is a local and two are global software compensation approaches. One method is based on a neural network to optimize the energy reconstruction, while two are energy weighting techniques, depending on the energy density. Weight factors are extracted from and applied to simulated and test beam data and result in an average energy resolutio...

Seidel, Katja

128

CMS HF calorimeter PMTs and Xi(c)+ lifetime measurement  

SciTech Connect

This thesis consists of two parts: In the first part we describe the Photomultiplier Tube (PMT) selection and testing processes for the Hadronic Forward (HF) calorimeter of the CMS, a Large Hadron Collier (LHC) experiment at CERN. We report the evaluation process of the candidate PMTs from three different manufacturers, the complete tests performed on the 2300 Hamamatsu PMTs which will be used in the HF calorimeter, and the details of the PMT Test Station that is in University of Iowa CMS Laboratories. In the second part we report the {Xi}{sub c}{sup +} lifetime measurement from SELEX, the charm hadro-production experiment at Fermilab. Based upon 301 {+-} 31 events from three di.erent decay channels, by using the binned maximum likelihood technique, we observe the lifetime of {Xi}{sub c}{sup +} as 427 {+-} 31 {+-} 13 fs.

Akgun, Ugur; /Iowa U.

2003-12-01

129

Status of the Liquid Xenon calorimeter of the CMD-3 detector  

NASA Astrophysics Data System (ADS)

Since 2010 the CMD-3 detector has been collecting data at the e+e- collider VEPP-2000 at Budker Institute of Nuclear Physics. CMD-3 is a general purpose detector designed to study e+e- annihilation into hadrons in the wide energy range ?s = 0.3-2GeV. The barrel electromagnetic calorimeter of the detector has a thickness equal to 13.5X0 and consists of two subsystems: closest to the beam pipe is the Liquid Xenon calorimeter (LXe) and the outer one is based on CsI scintillation crystals (CsI). The design of the LXe calorimeter and its current performance are presented.

Anisenkov, A. V.; Aulchenko, V. M.; Barkov, L. M.; Bashtovoy, N. S.; Epshteyn, L. B.; Grebenuk, A. A.; Ignatov, F. V.; Karpov, S. V.; Khazin, B. I.; Kozyrev, A. N.; Logashenko, I. B.; Mikhailov, K. Yu; Pestov, Yu N.; Popov, A. S.; Ruban, A. A.; Shebalin, V. E.; Titov, V. M.; Talyshev, A. A.; Yudin, Yu V.

2014-08-01

130

Results of prototype studies for a spaghetti calorimeter  

Microsoft Academic Search

In the framework of the LAA project, prototypes for a new type of calorimeter, intended for the detection of both electromagnetic (e.m.) and hadronic showers, muons and missing energy (e.g. neutrinos) at high-luminosity multi-TeV pp colliders, were tested. The detector consists of scintillating plastic fibres embedded in a lead matrix at a volume ratio 1:4, such as to achieve compensation.

D. Acosta; S. Buontempo; L P Calôba; M. Caria; R. Desalvo; A. Ereditato; R. Ferrari; M. Fraternali; G. Fumagalli; O. Gildemeister; F. G. Hartjes; Th. H. Henkes; A. Henriques; Lucie Linssen; M. Livan; A. Maio; Livio P Mapelli; K. H. Meier; B. Ong; H. P. Paar; F. Pastore; M G Pereira; Luc Poggioli; C. V. Scheel; J. M. Seixas; A. Simon; M. Sivertz; P. Sonderegger; M. N. Souza; Z. D. Thomé; V. Vercesi; R. Wigmans

1990-01-01

131

An Inexpensive Solution Calorimeter  

ERIC Educational Resources Information Center

We describe the construction of a simple solution calorimeter, using a miniature bead thermistor as a temperature-sensing element. This has a response time of a few seconds and made it possible to carry out a thermometric reaction in under a minute, which led to minimal heat losses. Small temperature changes of 1 K associated with enthalpies of…

Kavanagh, Emma; Mindel, Sam; Robertson, Giles; Hughes, D. E. Peter

2008-01-01

132

A Differential Emissivity Calorimeter  

Microsoft Academic Search

A calorimeter utilizing a differential emissivity thermopile to measure directly the radiant heat exchange of small animals is described. Other modes of heat exchange are effectively eliminated by containing the animal in an infrared transparent container. Noise on low level signals is minimal due to a special heat sink design. Construction details, optimization, calibration, and the validity of negative thermopile

B. H. Barkalow; K. M. Baldwin

1969-01-01

133

Addition of photosensitive dopants to the D0 liquid argon calorimeter  

SciTech Connect

The addition of photosensitive dopants to liquid argon greatly enhances the signal from heavily ionizing particles. Since binding energy losses we correlated with the heavily ionizing component in hadronic showers, the addition of photosensitive dopants has been suggested as a mechanism to tune the e/{pi} ratio in liquid argon calorimeters. A measurement was performed at the FNAL test beam, adding 4 ppM tetramethylgermanium to the D{phi} uranium-liquid argon calorimeter. An increase in response for electromagnetic and hadronic showers was observed, with no net change in the e/{pi} ratio.

Amos, N.A.; Anderson, D.F.; The D0 Collaboration

1992-10-01

134

NEUTRON-ENHANCED CALORIMETRY FOR HADRONS (NECH): FINAL REPORT  

SciTech Connect

We present the results of a project to apply scintillator technology recently developed at Louisiana Tech University to hadronic calorimetry. In particular, we developed a prototype calorimeter module incorporating scintillator embedded with metal oxide nanoparticles as the active layers. These metal oxide nanoparticles of gadolinium oxide, have high cross-sections for interactions with slow neutrons. As a part fo this research project, we have developed a novel method for producing plastic scintillators with metal oxide nanoparticles evenly distributed through the plastic without aggregation.We will test the performance of the calorimeter module in test beam and with a neutron source, in order to measure the response to the neutron component of hadronic showers. We will supplement our detector prototyping activities with detailed studies of the effect of neutron component on the resolution of hadronic energy measurements, particular in the next generation of particle flow calorimeters.

Andrew Stroud, Lee Sawyer

2012-08-31

135

Shell tile thermal protection system  

NASA Technical Reports Server (NTRS)

A reusable, externally applied thermal protection system for use on aerospace vehicles subject to high thermal and mechanical stresses utilizes a shell tile structure which effectively separates its primary functions as an insulator and load absorber. The tile consists of structurally strong upper and lower metallic shells manufactured from materials meeting the thermal and structural requirements incident to tile placement on the spacecraft. A lightweight, high temperature package of insulation is utilized in the upper shell while a lightweight, low temperature insulation is utilized in the lower shell. Assembly of the tile which is facilitated by a self-locking mechanism, may occur subsequent to installation of the lower shell on the spacecraft structural skin.

Macconochie, I. O.; Lawson, A. G.; Kelly, H. N. (inventors)

1984-01-01

136

Micromegas for imaging hadronic calorimetry  

E-print Network

The recent progress in R&D of the Micromegas detectors for hadronic calorimetry including new engineering-technical solutions, electronics development, and accompanying simulation studies with emphasis on the comparison of the physics performance of the analog and digital readout is described. The developed prototypes are with 2 bit digital readout to exploit the Micromegas proportional mode and thus improve the calorimeter linearity. In addition, measurements of detection efficiency, hit multiplicity, and energy shower profiles obtained during the exposure of small size prototypes to radioactive source quanta, cosmic particles and accelerator beams are reported. Eventually, the status of a large scale chamber (1{\\times}1 m2) are also presented with prospective towards the construction of a 1 m3 digital calorimeter consisting of 40 such chambers.

C. Adloff; J. Blaha; S. Cap; M. Chefdeville; A. Dalmaz; C. Drancourt; A. Espargiliere; R. Gaglione; R. Gallet; N. Geffroy; J. Jacquemier; Y. Karyotakis; F. Peltier; J. Prast; G. Vouters

2011-02-07

137

Radionuclide calorimeter system  

DOEpatents

A circuit for measuring temperature differentials in a calorimeter is disclosed. The temperature differential between the reference element and sample element containing a radioactive material is measured via a wheatstone bridge arrangement of thermistors. The bridge is driven with an alternating current on a pulsed basis to maintain the thermal floor of the calorimeter at a low reference value. A lock-in amplifier connected to the bridge phase locks a signal from the bridge to the input pulsed AC signal to provide a DC voltage. The DC voltage is sampled over time and provided to a digital computer. The digital computer, using curve fitting algorithms, will derive a function for the sample data. From the function, an equilibrium value for the temperature may be calculated.

Donohoue, Thomas P. (Denver, CO); Oertel, Christopher P. (Arvada, CO); Tyree, William H. (Boulder, CO); Valdez, Joe L. (Denver, CO)

1991-11-26

138

Radionuclide calorimeter system  

DOEpatents

A circuit for measuring temperature differentials in a calorimeter is disclosed. The temperature differential between the reference element and sample element containing a radioactive material is measured via a Wheatstone bridge arrangement of thermistors. The bridge is driven with an alternating current on a pulsed basis to maintain the thermal floor of the calorimeter at a low reference value. A lock-in amplifier connected to the bridge phase locks a signal from the bridge to the input pulsed AC signal to provide a DC voltage. The DC voltage is sampled over time and provided to a digital computer. The digital computer, using curve fitting algorithms, will derive a function for the sample data. From the function, an equilibrium value for the temperature may be calculated. 7 figures.

Donohoue, T.P.; Oertel, C.P.; Tyree, W.H.; Valdez, J.L.

1991-11-26

139

THE WINDSCALE BOMB CALORIMETER  

Microsoft Academic Search

The modifications to a standard, commercial-type, isothermal jacket ; calorimeter for use in measuring the total stored energy in irradiated graphite ; are described. The heat of combustion of unirradiated graphite was determined to ; be 7837.2 cal\\/g, indicating a standard error plus or minus 0.66 cal\\/g and an ; accuracy (98% confidence limits) of plus or minus 4 cal\\/g

G. F. Jackson; D. Cordall

1959-01-01

140

DSWA calorimeter bomb experiments  

SciTech Connect

Two experiments were performed in which 25 grams of TNT were detonated inside an expended detonation calorimeter bomb. The bomb had a contained volume of approximately 5.28 liters. In the first experiment, the bomb was charged with 3 atmospheres of nitrogen. In the second, it was charged with 2.58 atmospheres (23.1 psi gage) of oxygen. In each experiment pressure was monitored over a period of approximately 1200 microseconds after the pulse to the CDU. Monitoring was performed via two 10,000 psi 102AO3 PCB high frequency pressure transducers mounted symmetrically in the lid of the calorimeter bomb. Conditioners used were PCB 482As. The signals from the transducers were recorded in digital format on a multi channel Tektronix scope. The sampling frequency was 10 Mhz (10 samples per microsecond). After a period of cooling following detonation, gas samples were taken and were subsequently submitted for analysis using gas mass spectrometry. Due to a late request for post shot measurement, it was only possible to make a rough estimate of the weight of debris (carbon) remaining in the calorimeter bomb following the second experiment.

Cunningham, B

1998-10-01

141

Mini-bomb combustion calorimeter  

Microsoft Academic Search

Three mini-bomb calorimeters of different types have been built with the common characteristics: 5cm3 of bomb volume, 10mg of sample, ?420JK?1 of energy equivalent. These calorimeters can be calibrated by the electric method with the standard deviation of the mean of 0.02%. The results of burning reference material — benzoic acid (BA39i) by using the calorimeters 2 and 3 are

An Xu-wu; He Jun

2000-01-01

142

Hadronic Atoms  

E-print Network

We review the theory of hadronic atoms in QCD+QED. The non-relativistic effective Lagrangian approach, used to describe this type of bound states, is illustrated with the case of pi+pi- atoms. In addition, we discuss the evaluation of isospin-breaking corrections to hadronic atom observables by invoking chiral perturbation theory.

J. Gasser; V. E. Lyubovitskij; A. Rusetsky

2009-03-02

143

Monte Carlo studies of the ATLAS forward calorimeter and of the supersymmetric top quark  

Microsoft Academic Search

The Large Hadron Collider will collide 7 TeV proton beams with the intent of studying the Standard Model of Particle Physics and searching for physics beyond. One of the general purpose detectors designed to study the high energy proton collisions is called the ATLAS detector. The Liquid Argon Forward Calorimeter (FCal) of the ATLAS detector is an important component for

John Paul Archambault

2009-01-01

144

Preliminary large transverse energy cross sections measured with a 2. pi. calorimeter trigger  

SciTech Connect

Preliminary large transverse energy cross sections of 150, 300 GeV pions and protons on hydrogen measured with a large acceptance, segmented calorimeter are presented. Processes other than the scattering of two constituents appear to dominate this deep inelastic hadron scattering process.

Favuzzi, C.; Germinario, G.; Guerriero, L.; Lavopa, P.; Maggi, G.; de Marzo, C.; de Palma, M.; Posa, F.; Ranieri, A.; Selvaggi, G.; Spinelli, P.; Waldner, F.; Biatas, A.; Czyz, W.; Coghen, T.; Eskreys, A.; Eskreys, K.; Kisielewska, D.; Malecki, P.; Olkiewicz, K.; Sliwa, K.; Stopa, P.; Evans, W.H.; Fry, J.R.; Grant, C.; Houlden, M.; Morton, A.; Muirhead, H.; Shiers, J.; Antic, M.; Baker, W.; Bechteler, H.; Derado, I.; Eckardt, W.; Fent, J.; Freund, P.; Gebauer, H.J.; Kahl, T.; Kalbach, R.; Manz, A.; Polakos, P.; Pretzl, K.P.; Schmitz, N.; Seyboth, P.; Seyerlein, J.; Vranic, D.; Wolf, G.; Crijns, F.; Metzger, W.; Pols, C.; Schouten, T.; Spuijbroek, T.; Sarma, N.

1981-02-01

145

The limited streamer tubes system for the SLD warm iron calorimeter  

SciTech Connect

The SLD detector at the Stanford Linear Accelerator Center is a general purpose device for studying e{sup +}{epsilon}{sup {minus}} interaction at the Z{sup 0}. The SLD calorimeter system consists of two parts: a lead Liquid Argon Calorimeter (LAC) with both electromagnetic (22 radiation lengths) and hadronic sections (2.8 absorption lengths) housed inside the coil, and the Warm Ion limited streamer tubes Calorimeter (WIC) outside the coil which uses as radiator the iron of the flux return for the magnetic field. The WIC completes the measurement of the hadronic shower energy ({approximately}85% on average is contained in the LAC) and it provides identification and tracking for muons over 99% of the solid angle. In this note we report on the construction, test and commissioning of such a large system.

Benvenuti, A.C. [Istituto Nazionale di Fisica Nucleare, Bologna (Italy); Camanzi, B.; Piemontese, L.; Zucchelli, P. [Istituto Nazionale di Fisica Nucleare, Ferrara (Italy)]|[Ferrara Univ. (Italy); Calcaterra, A.; De Sangro, R.; De Simone, P.; De Simone, S.; Gallinaro, M.; Peruzzi, I.; Piccolo, M. [Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati; Burrows, P.N.; Busza, W.; Cartwright, S.L.; Fuess, S.; Gonzalez, S.; Hansl-Kozanecka, T.; Lath, A.; Lyons, T.; Osborne, L.S.; Rosenson, L.; Schneekloth, U.; Taylor, F.E.; Verdier, R.; Williams, D.C.; Yamartino, J.M. [Massachusetts Inst. of Tech., Cambridge, MA (United States); Bacchetta, N.; Bisello, D.; Castro, A.; Galvagni, S.; Loreti, M.; Pescara, L.; Wyss, J. [Istituto Nazionale di Fisica Nucleare, Padua (Italy)]|[Padua Univ. (Italy); Battiston, R.; Biasini, M.; Bilei, G.M.; Checcucci, B; Mancinelli, G.; Mantovani, G.; Pauluzzi, M.; Santocchia, A.; Servoli, L. [Istituto Nazionale di Fisica Nucleare, Perugia (Italy)]|[Perugia Univ. (Italy); Carpinelli, M.; Castaldi, R.; Cazzola, U.; Dell`Orso, R.; Pieroni, E.; Vannini, C.; Verdini, P.G. [Istituto Nazionale di Fisica Nucleare, Pisa (Italy)]|[Pisa Univ., S. Piero a Grado (Italy); Byers, B.L.; Escalera, J.; Kharakh, D.; Messner, R.L.; Zdarko, R.W. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Johnson, J.R. [Wisconsin Univ., Madison, WI (United States)

1992-01-01

146

The KLOE electromagnetic calorimeter  

NASA Astrophysics Data System (ADS)

The KLOE lead-scintillating fiber calorimeter has been fully installed in the KLOE assembly hall, and is currently operated with the final electronics and data acquisition system, using a cosmic rays trigger. The technical solutions adopted for the detector construction, the front end electronics design, and the data acquisition system are reviewed. The calibration procedure with cosmic rays is also presented. The performances obtained and the detector stability are shown to have met the tight requirements of the KLOE experiment in terms of time and energy resolution.

Passeri, A.; Adinolfi, M.; Ambrosino, F.; Aloisio, A.; Andryakov, A.; Angeletti, A.; Antonelli, A.; Bacci, C.; Baldini-Ferroli, R.; Barbiellini, G.; Bencivenni, G.; Bertolucci, S.; Bini, C.; Bloise, C.; Bocci, V.; Bossi, F.; Branchini, P.; Bucci, L.; Cabibbo, G.; Calcaterra, A.; Caloi, R.; Campana, P.; Capon, G.; Carboni, G.; Carboni, A.; Cardini, A.; Carusotti, C.; Cataldi, G.; Ceradini, F.; Cervelli, F.; Cevenini, F.; Chiefari, G.; Ciambrone, P.; Conticelli, S.; De Lucia, E.; De Robertis, G.; De Sangro, R.; De Simone, P.; De Zorzi, G.; Dell'Agnello, S.; Denig, A.; Di Domenico, A.; Di Falco, S.; Doria, A.; Donno, F.; Drago, E.; Elia, V.; Entesano, L.; Erriquez, O.; Farilla, A.; Felici, G.; Ferrari, A.; Ferrer, M. L.; Finocchiaro, G.; Fiore, D.; Forti, C.; Foti, G.; Franceschi, A.; Franzini, P.; Galli, A.; Gao, M. L.; Gatti, C.; Gauzzi, P.; Giovannella, S.; Golovatyuk, V.; Gorini, E.; Grancagnolo, F.; Graziani, E.; Guarnaccia, P.; Hagel, U. v.; Han, H. G.; Han, S. W.; Incagli, M.; Ingrosso, L.; Jiang, Y. Y.; Kim, W.; Kluge, W.; Kulikov, V.; Lacava, F.; Lanfranchi, G.; Lee-Franzini, J.; Lomtadze, T.; Luisi, C.; Mao, C. S.; Martini, A.; Mei, W.; Merola, L.; Messi, R.; Miscetti, S.; Moalem, A.; Moccia, S.; Murtas, F.; Napolitano, M.; Nedosekin, A.; Pagès, P.; Palutan, M.; Paoluzi, L.; Pasqualucci, E.; Passalacqua, L.; Passaseo, M.; Passeri, A.; Patera, V.; Petrolo, E.; Petrucci, G.; Picca, D.; Piccolo, M.; Pintus, A.; Pirozzi, G.; Pontecorvo, L.; Primavera, M.; Ruggieri, F.; Santangelo, P.; Santovetti, E.; Saracino, G.; Schamberger, R. D.; Schwick, C.; Sciascia, B.; Sciubba, A.; Scuri, F.; Sfiligoi, I.; Sinibaldi, S.; Spadaro, T.; Spagnolo, S.; Spiriti, E.; Stanescu, C.; Tortora, L.; Valente, E.; Valente, P.; Venanzoni, G.; Veneziano, S.; Vettoretti, D.; Weseler, S.; Xie, Y. G.; Zhang, C. D.; Zhang, J. Q.; Zhao, P. P.; KLOE Collaboration

1999-08-01

147

Scintillating fiber ribbon --- tungsten calorimeter  

SciTech Connect

We describe an ultra-high density scintillating fiber and tungsten calorimeter used as an active beam-dump for electrons. Data showing the calorimeter response to electrons with momenta between 50 and 350 GeV/c are presented. 9 figs.

Bross, A.; Crisler, M.; Kross, B.; Wrbanek, J.

1989-07-14

148

An Electrically Calibrated Bomb Calorimeter  

Microsoft Academic Search

After a review of the physical foundations of bomb calorimetry, a bomb calorimeter is described which can be heated electrically or by combustion. The evaporation of water is prevented by sealing the vessel completely. Other modifications in the normal technique are introduced after consideration of (a) the difference in temperature between the outer surface of the calorimeter and the thermometer

A. R. Challoner; H. A. Gundry; A. R. Meetham

1955-01-01

149

An automatic adiabatic bomb calorimeter  

Microsoft Academic Search

The paper details the conversion of an existing isothermal bomb calorimeter to an adiabatic calorimeter with automatic control. Thermistors in the inner and outer vessels are included in two arms of an a.c. Wheatstone bridge: any rise in temperature of the inner vessel above that of the outer vessel results in phase reversal of the output voltage from the bridge,

W F Raymond; R J Canaway; C E Harris

1957-01-01

150

Averaged coordination numbers of planar aperiodic tilings  

E-print Network

We consider averaged shelling and coordination numbers of aperiodic tilings. Shelling numbers count the vertices on radial shells around a vertex. Coordination numbers, in turn, count the vertices on coordination shells of a vertex, defined via the graph distance given by the tiling. For the Ammann-Beenker tiling, we find that coordination shells consist of complete shelling orbits, which enables us to calculate averaged coordination numbers for rather large distances explicitly. The relation to topological invariants of tilings is briefly discussed.

Michael Baake; Uwe Grimm

2005-09-18

151

Composite treatment of ceramic tile armor  

DOEpatents

An improved ceramic tile armor has a core of boron nitride and a polymer matrix composite (PMC) facing of carbon fibers fused directly to the impact face of the tile. A polyethylene fiber composite backing and spall cover are preferred. The carbon fiber layers are cured directly onto the tile, not adhered using a separate adhesive so that they are integral with the tile, not a separate layer.

Hansen, James G. R. (Oak Ridge, TN) [Oak Ridge, TN; Frame, Barbara J. (Oak Ridge, TN) [Oak Ridge, TN

2010-12-14

152

Composite treatment of ceramic tile armor  

DOEpatents

An improved ceramic tile armor has a core of boron nitride and a polymer matrix composite (PMC) facing of carbon fibers fused directly to the impact face of the tile. A polyethylene fiber composite backing and spall cover are preferred. The carbon fiber layers are cured directly onto the tile, not adhered using a separate adhesive so that they are integral with the tile, not a separate layer.

Hansen, James G. R. (Oak Ridge, TN); Frame, Barbara J. (Oak Ridge, TN)

2012-01-02

153

Spherical Tiling by 12 Congruent Pentagons  

E-print Network

The edge-to-edge tiling of the 2-dimensional sphere by congruent pentagons must contain at least 12 tiles. We give almost complete classification of the minimal tiling by 12 congruent pentagons, with the only unsolved problem being some very specific spherical geometrical problem. This is done by first separately classifying the combinatorial, edge length, and angle aspects of the tiling, and then combining the respective classifications together.

Gao, Honghao; Yan, Min

2010-01-01

154

Ceramic tiles: above and beyond traditional applications  

Microsoft Academic Search

At present ceramic tiles are already being marketed with characteristics and performance features that make them products whose applications go far beyond traditional tile uses. These are not just future possibilities: their industrial and commercial reality already makes them immediately serviceable in multiple environments. And this is precisely the key concept in these new tile applications: their features make them

A. Moreno

155

Electromagnetic calorimeter for the HADES@FAIR experiment  

NASA Astrophysics Data System (ADS)

An electromagnetic calorimeter (ECAL) is being developed to complement the dilepton spectrometer HADES currently operating on the beam of the SIS18 heavy-ion synchrotron at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. The ECAL will allow the HADES@FAIR experiment to measure data on neutral meson production in heavy ion collisions in the energy range of 2-10 AGeV with the beam of the future accelerator SIS100@FAIR. The calorimeter will also improve the electron-hadron separation of the spectrometer, and will be used for the detection of photons from strange resonances in elementary and heavy ion reactions as well. The calorimeter will consist of 978 modules divided into 6 sectors, and it will cover forward angles of 16° < ? < 45° and almost full azimuthal angle. Each module consists of a lead glass Cherenkov counter, photomultiplier, HV divider and an optical fiber. A dedicated LED based system being developed to monitor the stability of the calorimeter is discussed. Various prototypes of front-end electronics are presented and the achieved energy and time resolution determined using pulses from a pulse generator and a real detector signal induced by LED pulses and cosmic muons is shown as well.

Svoboda, O.; Blume, C.; Czyžycki, W.; Epple, E.; Fabbietti, L.; Galatyuk, T.; Golubeva, M.; Guber, F.; Hlavá?, S.; Ivashkin, A.; Kajetanowic, M.; Kardan, B.; Koenig, W.; Kugler, A.; Lapidus, K.; Lisowski, E.; Pietraszko, J.; Reshetin, A.; Rost, A.; Salabura, P.; Sobolev, Y. G.; Tlusty, P.; Traxler, M.

2014-05-01

156

Hadron interactions  

SciTech Connect

In this talk I am reviewing recent calculations of properties of multi-hadron systems in lattice QCD. In particular, I am reviewing results of elastic scattering phase shifts in meson-meson, meson-baryon and baryon-baryon systems, as well as discussing results indicating possible existence of bound states in two baryon systems. Finally, calculations of properties of systems with more than two hadrons are presented.

K. Orginos

2011-12-01

157

Fusion: A general framework for hierarchical tilings  

E-print Network

One well studied way to construct quasicrystalline tilings is via inflate-and-subdivide (a.k.a. substitution) rules. These produce self-similar tilings--the Penrose, octagonal, and pinwheel tilings are famous examples. We present a different model for generating hierarchical tilings we call "fusion rules". Inflate-and-subdivide rules are a special case of fusion rules, but general fusion rules are more flexible and allow for defects, changes in geometry, and even constrained randomness. A condition that produces homogeneous structures and a method for computing frequency for fusion tiling spaces are discussed.

Natalie Priebe Frank

2013-11-21

158

Electron Calorimeter Experiment  

NASA Technical Reports Server (NTRS)

Boron loaded scintillators are suitable for measuring secondary neutrons produced by high-energy particles: protons & electrons Neutron flux can be used to discriminate hadron and electro-magnetic particles Combined effectiveness of all e/p discriminators techniques employedTBD Only moderate improvement in detection efficiency for B-10 concentrations >few% in thick moderators Bottom scintillator might serve as cascade penetration counter (TBC)

Adams, James H.

2008-01-01

159

The CDF miniplug calorimeters  

SciTech Connect

Two MiniPlug calorimeters, designed to measure the energy and lateral position of particles in the (forward) pseudorapidity region of 3.6 < |{nu}| < 5.2 of the CDF detector, have been recently installed as part of the Run II CDF upgrade at the Tevatron {bar p}p collider. They consist of lead/liquid scintillator read out by wavelength shifting fibers arranged in a pixel-type towerless geometry suitable for ''calorimetric tracking''. The design concept, the prototype performance and the final design of the MiniPlugs are here described. A recent cosmic ray test resulted in a light yield of approximately 100 pe/MIP, which exceeds our design requirements.

Stefano Lami

2002-06-28

160

Impacts of Space Shuttle thermal protection system tile on F-15 aircraft vertical tile  

NASA Technical Reports Server (NTRS)

Impacts of the space shuttle thermal protection system (TPS) tile on the leading edge and the side of the vertical tail of the F-15 aircraft were analyzed under different TPS tile orientations. The TPS tile-breaking tests were conducted to simulate the TPS tile impacts. It was found that the predicted tile impact forces compare fairly well with the tile-breaking forces, and the impact forces exerted on the F-15 aircraft vertical tail were relatively low because a very small fraction of the tile kinetic energy was dissipated in the impact, penetration, and fracture of the tile. It was also found that the oblique impact of the tile on the side of the F-15 aircraft vertical tail was unlikely to dent the tail surface.

Ko, W. L.

1985-01-01

161

Programmable DNA tile self-assembly using a hierarchical sub-tile strategy  

NASA Astrophysics Data System (ADS)

DNA tile based self-assembly provides a bottom-up approach to construct desired nanostructures. DNA tiles have been directly constructed from ssDNA and readily self-assembled into 2D lattices and 3D superstructures. However, for more complex lattice designs including algorithmic assemblies requiring larger tile sets, a more modular approach could prove useful. This paper reports a new DNA ‘sub-tile’ strategy to easily create whole families of programmable tiles. Here, we demonstrate the stability and flexibility of our sub-tile structures by constructing 3-, 4- and 6-arm DNA tiles that are subsequently assembled into 2D lattices and 3D nanotubes according to a hierarchical design. Assembly of sub-tiles, tiles, and superstructures was analyzed using polyacrylamide gel electrophoresis and atomic force microscopy. DNA tile self-assembly methods provide a bottom-up approach to create desired nanostructures; the sub-tile strategy adds a useful new layer to this technique. Complex units can be made from simple parts. The sub-tile approach enables the rapid redesign and prototyping of complex DNA tile sets and tiles with asymmetric designs.

Shi, Xiaolong; Lu, Wei; Wang, Zhiyu; Pan, Linqiang; Cui, Guangzhao; Xu, Jin; LaBean, Thomas H.

2014-02-01

162

Performance of prototypes for the ALICE electromagnetic calorimeter  

NASA Astrophysics Data System (ADS)

The performance of prototypes for the ALICE electromagnetic sampling calorimeter has been studied in test beam measurements at FNAL and CERN. A 4×4 array of final design modules showed an energy resolution of about 11%/?{E(GeV)}?1.7% with a uniformity of the response to electrons of 1% and a good linearity in the energy range from 10 to 100 GeV. The electromagnetic shower position resolution was found to be described by 1.5 mm?5.3 mm/?{E(GeV)}. For an electron identification efficiency of 90% a hadron rejection factor of >600 was obtained.

Allen, J.; Awes, T.; Badalá, A.; Baumgart, S.; Bellwied, R.; Benhabib, L.; Bernard, C.; Bianchi, N.; Blanco, F.; Bortoli, Y.; Bourdaud, G.; Bourrion, O.; Boyer, B.; Bruna, E.; Butterworth, J.; Caines, H.; Calvo Diaz Aldagalan, D.; Capitani, G. P.; Carcagno, Y.; Casanova Diaz, A.; Cherney, M.; Conesa Balbastre, G.; Cormier, T. M.; Cunqueiro Mendez, L.; Delagrange, H.; Del Franco, M.; Dialinas, M.; di Nezza, P.; Donoghue, A.; Elnimr, M.; Enokizono, A.; Estienne, M.; Faivre, J.; Fantoni, A.; Fichera, F.; Foglio, B.; Fresneau, S.; Fujita, J.; Furget, C.; Gadrat, S.; Garishvili, I.; Germain, M.; Giudice, N.; Gorbunov, Y.; Grimaldi, A.; Guardone, N.; Guernane, R.; Hadjidakis, C.; Hamblen, J.; Harris, J. W.; Hasch, D.; Heinz, M.; Hille, P. T.; Hornback, D.; Ichou, R.; Jacobs, P.; Jangal, S.; Jayananda, K.; Klay, J. L.; Knospe, A. G.; Kox, S.; Kral, J.; Laloux, P.; Lapointe, S.; La Rocca, P.; Lewis, S.; Li, Q.; Librizzi, F.; Madagodahettige Don, D.; Martashvili, I.; Mayes, B.; Milletto, T.; Muccifora, V.; Muller, H.; Muraz, J. F.; Nattrass, C.; Noto, F.; Novitzky, N.; Odyniec, G.; Orlandi, A.; Palmeri, A.; Pappalardo, G. S.; Pavlinov, A.; Pesci, W.; Petrov, V.; Petta, C.; Pichot, P.; Pinsky, L.; Ploskon, M.; Pompei, F.; Pulvirenti, A.; Putschke, J.; Pruneau, C. A.; Rak, J.; Rasson, J.; Read, K. F.; Real, J. S.; Reolon, A. R.; Riggi, F.; Riso, J.; Ronchetti, F.; Roy, C.; Roy, D.; Salemi, M.; Salur, S.; Sharma, M.; Silvermyr, D.; Smirnov, N.; Soltz, R.; Sparti, V.; Stutzmann, J.-S.; Symons, T. J. M.; Tarazona Martinez, A.; Tarini, L.; Thomen, R.; Timmins, A.; van Leeuwen, M.; Vieira, R.; Viticchié, A.; Voloshin, S.; Wang, D.; Wang, Y.; Ward, R. M.; ALICE EMCal Group

2010-03-01

163

A liquid scintillator calorimeter for the forward region of an LHC experiment  

NASA Astrophysics Data System (ADS)

We report on the design and on beam test results of a liquid scintillator/lead prototype calorimeter. The detector was proposed as one of the options for the forward region of an experiment at the future large hadron collider (LHC) at CERN. The measurements were performed with electron and pion beams of the CERN SPS in the energy range from 20 to 150 GeV. The response as a function of the beam impact point and of the incidence angle is studied with and without a passive preradiator in front of the calorimeter modules.

Artamonov, A.; Epstein, V.; Gorbunov, P.; Jemanov, V.; Khovansky, V.; Kruchinin, S.; Maslennikov, A.; Rjabinin, M.; Zaitsev, V.; Zeldovich, S.; Zuckerman, I.; Barassi, V.; Buontempo, S.; Ereditato, A.; Fiorillo, G.; Garufi, F.

1995-02-01

164

Reconstruction of showers in the calorimeter during the first flight of the CREAM balloon experiment  

E-print Network

The Cosmic Ray Energetics And Mass (CREAM) balloon-borne experiment was first flown from Antarctica in December 2004. The instrument includes a tungsten/Sci-Fi calorimeter preceded by a graphite target (~0.5 interaction length and ~1 radiation length) where a hadronic shower is initiated by the inelastic interaction of the incoming nucleus. The fine granularity (1 cm) of the 20 radiation length calorimeter allows the imaging of the narrow electromagnetic core of the shower and the determination of the direction of the incident particle. Preliminary results, from the flight data, on the shower reconstruction capability of the instrument and on the observed shower properties are presented.

The CREAM Collaboration

2005-07-21

165

Test beam results on the Proton Zero Degree Calorimeter for the ALICE experiment  

SciTech Connect

The proton Zero Degree Calorimeter (ZP) for the ALICE experiment will measure the energy of the spectator protons in heavy ion collisions at the CERN LHC. Since all the spectator protons have the same energy, the calorimeter's response is proportional to their number, providing a direct information on the centrality of the collision. The ZP is a spaghetti calorimeter, which collects and measures the Cherenkov light produced by the shower particles in silica optical fibers embedded in a brass absorber. The details of its construction will be shown. The calorimeter was tested at the CERN SPS using pion and electron beams with momenta ranging from 50 to 200 GeV/c. The response of the calorimeter and its energy resolution have been studied as a function of the beam energy. Also, the signal uniformity and a comparison between the transverse profile of the hadronic and electromagnetic shower are presented. Moreover, the differences between the calorimeter's responses to protons and pions of the same energy have been investigated, exploiting the proton contamination in the positive pion beams.

Arnaldi, R.; Chiavassa, E.; De Marco, N.; Ferretti, A.; Gagliardi, M.; Gallio, M.; Gemme, R.; Mereu, P.; Musso, A.; Oppedisano, C.; Piccotti, A.; Poggio, F.; Scomparin, E.; Stocco, D.; Vercellin, E.; Yermia, F. [Universita di Torino, Turin (Italy); INFN, Turin (Italy); Cicalo, C.; De Falco, A.; Floris, M.; Masoni, A. [Universita di Cagliari, Cagliari (Italy); INFN, Cagliari (Italy)] (and others)

2006-10-27

166

Search for long-lived stopped R-hadrons decaying out of time with pp collisions using the ATLAS detector  

E-print Network

An updated search is performed for gluino, top squark, or bottom squark R-hadrons that have come to rest within the ATLAS calorimeter, and decay at some later time to hadronic jets and a neutralino, using 5.0 and ...

Taylor, Frank E.

167

Acoustic emission monitoring of Space Shuttle tiles  

NASA Technical Reports Server (NTRS)

Late in the development of the Space Shuttle thermal protection system (TPS), a major problem was encountered with the attachment of the tiles to the spacecraft's exterior skin. To insure an adequate margin, each tile had to be proof tested. The risk of damaging a tile during proof test was quite high. For this reason, an acoustic emission system was developed and used in conjunction with the proof test to insure no significant damage occurred.

Castner, W. L.; Crockett, L. K.; Sugg, F. E.

1985-01-01

168

Global Swath and Gridded Data Tiling  

NASA Technical Reports Server (NTRS)

This software generates cylindrically projected tiles of swath-based or gridded satellite data for the purpose of dynamically generating high-resolution global images covering various time periods, scaling ranges, and colors called "tiles." It reconstructs a global image given a set of tiles covering a particular time range, scaling values, and a color table. The program is configurable in terms of tile size, spatial resolution, format of input data, location of input data (local or distributed), number of processes run in parallel, and data conditioning.

Thompson, Charles K.

2012-01-01

169

Ribbon Tilings and Multidimensional Height Functions  

E-print Network

We fix $n$ and say a square in the two-dimensional grid indexed by $(x,y)$ has color $c$ if $x+y \\equiv c \\pmod{n}$. A {\\it ribbon tile} of order $n$ is a connected polyomino containing exactly one square of each color. We show that the set of order-$n$ ribbon tilings of a simply connected region $R$ is in one-to-one correspondence with a set of {\\it height functions} from the vertices of $R$ to $\\mathbb Z^{n}$ satisfying certain difference restrictions. It is also in one-to-one correspondence with the set of acyclic orientations of a certain partially oriented graph. Using these facts, we describe a linear (in the area of $R$) algorithm for determining whether $R$ can be tiled with ribbon tiles of order $n$ and producing such a tiling when one exists. We also resolve a conjecture of Pak by showing that any pair of order-$n$ ribbon tilings of $R$ can be connected by a sequence of local replacement moves. Some of our results are generalizations of known results for order-2 ribbon tilings (a.k.a. domino tilings). We also discuss applications of multidimensional height functions to a broader class of polyomino tiling problems.

Scott Sheffield

2001-07-12

170

The design and performance of the electromagnetic calorimeters in Hall C at Jefferson Lab  

SciTech Connect

The design and performance of the electromagnetic calorimeters in the magnetic spectrometers in Hall C at Jefferson Lab are presented. For the existing HMS and SOS spectrometers, construction information and comparisons of simulated and experimental results are presented. The design and simulated performance for a new calorimeter to be used in the new SHMS spectrometer is also presented. We have developed and constructed electromagnetic calorimeters from TF-1 type lead-glass blocks for the HMS and SOS magnetic spectrometers at JLab Hall C. The HMS/SOS calorimeters are of identical design and construction except for their total size. Blocks of dimension 10 cm × 10 cm × 70 cm are arranged in four planes and stacked 13 and 11 blocks high in the HMS and SOS respectively. The energy resolution of these calorimeters is better than 6%/?E, and pion/electron (?/e) separation of about 100:1 has been achieved in energy range 1–5 GeV. Good agreement has been observed between the experimental and GEANT4 simulated energy resolutions. The HMS/SOS calorimeters have been used nearly in all Hall C experiments, providing good energy resolution and a high pion suppression factor. No significant deterioration in their performance has been observed in the course of use since 1994. For the SHMS spectrometer, presently under construction, details on the calorimeter design and accompanying GEANT4 simulation efforts are given. A Preshower+Shower design was selected as the most cost-effective among several design choices. The preshower will consist of a layer of 28 modules with TF-1 type lead glass radiators, stacked in two columns. The shower part will consist of 224 modules with F-101 type lead glass radiators, stacked in a “fly's eye” configuration of 14 columns and 16 rows. The active area of 120 × 130 cm(2) will encompass the beam envelope at the calorimeter. The anticipated performance of the new calorimeter is simulated over the full momentum range of the SHMS, predicting resolution and yields similar to the HMS calorimeter. Good electron/hadron separation can be achieved by using energy deposition in the Preshower along with total energy deposition in the calorimeter. In this case the PID capability is similar to or better than that attainable with HMS calorimeter, with a pion suppression factor of a few hundreds predicted for 99% electron detection efficiency.

Vardan Tadevosyan, Hamlet Mkrtchyan, Arshak Asaturyan, Arthur Mkrtchyan, Simon Zhamkochyan

2012-12-01

171

The CMS barrel calorimeter response to particle beams from 2-GeV/c to 350-GeV/c  

SciTech Connect

The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 to 350 GeV/c has been measured. To our knowledge, this is the widest range of momenta in which any calorimeter system has been studied. These tests, carried out at the H2 beam-line at CERN, provide a wealth of information, especially at low energies. The analysis of the differences in calorimeter response to charged pions, kaons, protons and antiprotons and a detailed discussion of the underlying phenomena are presented. We also show techniques that apply corrections to the signals from the considerably different electromagnetic (EB) and hadronic (HB) barrel calorimeters in reconstructing the energies of hadrons. Above 5 GeV/c, these corrections improve the energy resolution of the combined system where the stochastic term equals 84.7 {+-} 1.6% and the constant term is 7.4 {+-} 0.8%. The corrected mean response remains constant within 1.3% rms.

Abdullin, S.; /Moscow, ITEP; Abramov, V.; /Serpukhov, IHEP; Acharya, B.; /Tata Inst.; Adam, N.; /Princeton U.; Adams, M.; /Illinois U., Chicago; Adzic, P.; /Belgrade U.; Akchurin, N.; /Texas Tech.; Akgun, U.; Albayrak, E.; /Iowa U.; Alemany-Fernandez, R.; Almeida, N.; /Lisbon, LIFEP /Democritos Nucl. Res. Ctr. /Virginia U. /Iowa State U.

2009-01-01

172

Conformal invariance of domino tiling  

E-print Network

Let U be a multiply-connected region in R^2 with smooth boundary. Let P_epsilon be a polyomino in epsilon Z^2 approximating U as epsilon tends to 0. We show that, for certain boundary conditions on P_epsilon, the height distribution on a random domino tiling (dimer covering) of P_epsilon is conformally invariant in the limit as epsilon tends to 0, in the sense that the distribution of heights of boundary components only depends on the conformal type of U. The mean height and all the moments are explicitly evaluated.

Richard Kenyon

1999-10-01

173

Thermal Characterization of TPS Tiles  

NASA Astrophysics Data System (ADS)

The Thermal Protection System (TPS) used on space shuttles protects the metallic structure from the large amounts of heat created during travel through the atmosphere, both on takeoff and reentry. The shuttle experiences high thermo-acoustic loading and impact damage from micro-meteorites, which can cause disbonds, delaminations, chips, cracks, and other defects to the TPS system. To enhance durability and damage tolerance, new TPS tiles with an added protective ceramic-matrix-composite layer are being developed. This paper explores the use of pulsed thermography as a quick, diverse, non-destructive technique, to characterize the TPS system. The pulsed thermography images obtained are presented and analyzed.

Kacmar, C. J.; LaCivita, K. J.; Jata, K. V.; Sathish, S.

2006-03-01

174

Response of the D0 calorimeter to cosmic ray muons  

SciTech Connect

The D0 Detector at the Fermi National Accelerator Laboratory is a large multipurpose detector facility designed for the study of proton-antiproton collision products at the center-of-mass energy of 2 TeV. It consists of an inner tracking volume, hermetic uranium/liquid argon sampling calorimetry, and an outer 47{pi} muon detector. In preparation for our first collider run, the collaboration organized a Cosmic Ray Commissioning Run, which took place from February--May of 1991. This thesis is a detailed study of the response of the central calorimeter to cosmic ray muons as extracted from data collected during this run. We have compared the shapes of the experimentally-obtained pulse height spectra to the Landau prediction for the ionization loss in a continuous thin absorber in the four electromagnetic and four hadronic layers of the calorimeter, and find good agreement after experimental effects are folded in. We have also determined an absolute energy calibration using two independent methods: one which measures the response of the electronics to a known amount of charge injected at the preamplifiers, and one which uses a carry-over of the calibration from a beam test of central calorimeter modules. Both absolute energy conversion factors agree with one another, within their errors. The calibration determined from the test beam carryover, relevant for use with collider physics data, has an error of 2.3%. We believe that, with further study, a final error of {approx}1% will be achieved. The theory-to-experiment comparison of the peaks (or most probable values) of the muon spectra was used to determine the layer-to-layer consistency of the muon signal. We find that the mean response in the 3 fine hadronic layers is (12 {plus_minus} 2%) higher than that in the 4 electromagnetic layers. These same comparisons have been used to verify the absolute energy conversion factors. The conversion factors work well for the electromagnetic sections.

Kotcher, J.

1992-10-01

175

A Highly Sensitive Dynamic Bomb Calorimeter  

Microsoft Academic Search

A dynamic bomb calorimeter of a novel type has been developed for the purpose of thermochemical investigations of organometallic and inorganic compounds using the most advanced methods. The calorimeter combines the operating principles of the two existing types of calorimeters (liquid and massive) and enables to combine the advantages and to eliminate disadvantages of the two types. In addition, it

Saleh N. Hajiev

1970-01-01

176

Radiation qualification of the front-end electronics for the readout of the ATLAS liquid argon calorimeters  

NASA Astrophysics Data System (ADS)

The ATLAS detector has been built to study the reactions produced by the Large Hadron Collider (LHC). ATLAS includes a system of liquid argon calorimeters for energy measurements. The electronics for amplifying, shaping, sampling, pipelining, and digitizing the calorimeter signals is implemented on a set of front-end electronic boards. The front-end boards are installed in crates mounted between the calorimeters, where they will be subjected to significant levels of radiation during LHC operation. As a result, all components used on the front-end boards had to be subjected to an extensive set of radiation qualification tests. This paper describes radiation-tolerant designs, radiation testing, and radiation qualification of the front-end readout system for the ATLAS liquid argon calorimeters.

Buchanan, N. J.; Chen, L.; Gingrich, D. M.; Liu, S.; Chen, H.; Damazio, D.; Densing, F.; Kierstead, J.; Lanni, F.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rescia, S.; Takai, H.; Ban, J.; Böttcher, S.; Dannheim, D.; Parsons, J. A.; Simon, S.; Sippach, W.; Cheplakov, A.; Golikov, V.; Golubyh, S.; Kukhtin, V.; Kulagin, E.; Ladygin, E.; Luschikov, V.; Obudovsky, V.; Shalyugin, A.; Puzo, P.; Richer, J. P.; Seguin-Moreau, N.; de la Taille, C.; Dumont-Dayot, N.; Massol, N.; LeDortz, O.; Hubaut, F.; Laforge, B.; Martin, D.; Schwemling, Ph; Andrieux, M.-L.; Collot, J.; Dzahini, D.; Hostachy, J. Y.; Martin, P.; Brettel, H.; Cwienk, W.; Fent, J.; Jakobs, K.; Kurchaninov, L.; Oberlack, H.; Schacht, P.; Stiegler, U.; Battistoni, G.; Citterio, M.; Sala, P.; Cleland, W.; Borgeaud, P.; de la Broïse, X.; LeCoguie, A.; Mansoulié, B.; Pascual, J.; Dinkespiler, B.; Liu, T.; Stroynowski, R.; Ye, J.; Grahn, K.-J.; Hansson, P.; Lund-Jensen, B.; Chu, M. L.; Hou, S.; Su, D. S.; Teng, P. K.

2008-10-01

177

Monitoring and data quality assessment of the ATLAS liquid argon calorimeter  

E-print Network

The liquid argon calorimeter is a key component of the ATLAS detector installed at the CERN Large Hadron Collider. The primary purpose of this calorimeter is the measurement of electrons and photons. It also provides a crucial input for measuring jets and missing transverse momentum. An advanced data monitoring procedure was designed to quickly identify issues that would affect detector performance and ensure that only the best quality data are used for physics analysis. This article presents the validation procedure developed during the 2011 and 2012 LHC data taking periods, in which more than 98% of the proton proton luminosity recorded by ATLAS at a centre-of-mass energy of 7 and 8 TeV had calorimeter data quality suitable for physics analysis.

ATLAS Collaboration

2014-05-15

178

A new precision flow calorimeter  

E-print Network

. THE REFERENCE FLUID CIRCUIT (The Thermo-Syphon System) 2. THE SAMPLE FLUID CIRCUIT 11 17 CALORIMETER AUXILIARY EQUIPMENT 1. BAYONET SYSTEM 2. MATCHING HEATER 3. PRESSURE TRANSDUCER 4. VACUUM SYSTEM 5. MAGNETIC STIRRER 6. METERING PUMP 20 25 25 31... Circuit (Thermo-Syphon System) Detail 12 4 A Typical Cycle of Thermo-Syphon System on a PT Diagram of Freon&-11 13 5 The Reference Fluid Circuit Simplified 14 6 The Sample Fluid Flow System 7 Calorimeter Detail 21 8 Bayonet System Detail 9 Copper...

Johnson, Mark Gezer

2012-06-07

179

Relaxation calorimeter for hydrogen thermoporometry.  

PubMed

A relaxation calorimeter for measuring the heat capacity of hydrogen isotopes in nanoporous solids is described. Apparatus' features include (i) cooling by a pulse tube refrigerator, (ii) a modular design, allowing for rapid reconfiguration and sample turn around, (iii) a thermal stability of ?1 mK, and (iv) a bottom temperature of ~5 K. The calorimeter is tested on effective heat capacity measurements of H2 in Vycor (silica) nanoporous glass, yielding a very detailed pore size distribution analysis with an effectively sub-Angstrom resolution. PMID:23742560

Van Cleve, E; Worsley, M A; Kucheyev, S O

2013-05-01

180

Relaxation calorimeter for hydrogen thermoporometry  

NASA Astrophysics Data System (ADS)

A relaxation calorimeter for measuring the heat capacity of hydrogen isotopes in nanoporous solids is described. Apparatus' features include (i) cooling by a pulse tube refrigerator, (ii) a modular design, allowing for rapid reconfiguration and sample turn around, (iii) a thermal stability of ?1 mK, and (iv) a bottom temperature of ˜5 K. The calorimeter is tested on effective heat capacity measurements of H2 in Vycor (silica) nanoporous glass, yielding a very detailed pore size distribution analysis with an effectively sub-Angstrom resolution.

Van Cleve, E.; Worsley, M. A.; Kucheyev, S. O.

2013-05-01

181

D-Zero Calorimeter Multiplan  

SciTech Connect

This short report explains the parameters, and their basis, of the D-Zero calorimeter multiplan spread sheet Macintosh Multiplan worksheets have been found to be a valuable asset to the D-Zero design effort. The spread sheet contains parameters (constants) and results that come from the parameters. The full effect of changes in D-Zero calorimeter parameters can be calculated quite easily with Multiplan. When a change in a parameter is made, any results that pertain to that parameter automatically change also. This report will explain how some of the unobvious results were obtained.

Wintercorn, S.J.; /Fermilab

1987-06-15

182

Covering the Plane with Rep-Tiles  

NSDL National Science Digital Library

In this lesson, "students discover and explore a special kind of tiling of the plane. Rep-tiles are geometric figures such that n copies can fit together to form a larger, similar figure. Students experiment with various shapes and values of n. Spatial sense is encouraged by the need to visualize and perform transformations with the shapes involved." (from NCTM's Illuminations)

Mathematics, Illuminations N.

2009-07-20

183

The Sad Case of the Columbine Tiles.  

ERIC Educational Resources Information Center

Analyzes free-speech challenge to school district's guidelines for acceptable expressions on ceramic tiles painted by Columbine High School students to express their feelings about the massacre. Tenth Circuit found that tile painting constituted school-sponsored speech and thus district had the constitutional authority under "Hazelwood School…

Dowling-Sendor, Benjamin

2003-01-01

184

FRACTAL TILING MICHAEL BARNSLEY AND ANDREW VINCE  

E-print Network

FRACTAL TILING MICHAEL BARNSLEY AND ANDREW VINCE Abstract. A simple, yet unifying method be constructed by this method. These tilings can be used to extend a fractal transformation defined on the attractor of a contractive IFS to a fractal transformation on the entire space upon which the IFS acts. 1

Vince, Andrew

185

Emittance measurements of RCG coated Shuttle tiles  

NASA Technical Reports Server (NTRS)

The spectral and total normal emittance of the Reaction Cured Glass (RCG) coating used on Shuttle tiles has been measured for surface temperatures of 300 to 1905 K. These measurements were made on two virgin and two flown Shuttle tile samples. Room temperature directional emittance data were also obtained and used to determine the total hemispherical emittance of RCG as a function of temperature. The data obtained from this calculation indicate that the total hemispherical emittance decreases from a room temperature value of 0.83 to a value of 0.76 at 1905 K. The flown Shuttle tiles exhibited a change in the spectral distribution of emittance compared to that of the virgin tile, but no significant trends in the total emittance from a virgin to a flown tile could be established.

Bouslog, Stanley A.; Cunnington, George R., Jr.

1992-01-01

186

Calibration and Monitoring of the ZEUS Uranium Scintillator Calorimeter at Hera  

NASA Astrophysics Data System (ADS)

One of the main components of the ZEUS detector at the HERA storage ring is the Uranium Calorimeter (UCAL). It has been running successfully since ZEUS started data taking in 1992. The UCAL is a Uranium-Scintillator calorimeter with equal response for electrons and hadrons ({(e)/(h) = 1.00 ± 0.05; ), a linear energy response and a high energy resolution of (? (E))/(E) = (18% )/( ? {E)} for electrons and (? (E))/(E) = (35% )/(? {E)} for hadrons. It covers 99.7% of the solid angle and is able to handle bunch crossing rate of up to 10.4 MHz. This performance demands a very precise calibration and a constant monitoring of the detector. In this paper we present the procedure to achieve a calibration accuracy of better than 3% and to maintain it stable to better than 2% for more than 10 years.

Barbi, M.

2002-01-01

187

Hadron spectroscopy  

SciTech Connect

Heavy quark systems and glueball candidates, the particles which are relevant to testing QCD, are discussed. The review begins with the heaviest spectroscopically observed quarks, the b anti-b bound states, including the chi state masses, spins, and hadronic widths and the non-relativistic potential models. Also, P states of c anti-c are mentioned. Other heavy states are also discussed in which heavy quarks combine with lighter ones. The gluonium candidates iota(1460), theta(1700), and g/sub T/(2200) are then covered. The very lightest mesons, pi-neutral and eta, are discussed. 133 refs., 24 figs., 16 tabs. (LEW)

Cooper, S.

1985-10-01

188

Hadron Structure  

E-print Network

This is a review of recent developments in hadron structure within the framework of Lattice QCD. The main focus is on recent achievements in the evaluation of nucleon quantities, such as the axial charge, electromagnetic form factors, the Dirac and Pauli radii, the quark momentum fraction and the spin content of the nucleon, in view of simulations at pion masses very close to their physical value. A discussion of the systematic uncertainties and the computation of the disconnected contributions using dynamical simulations is also included. Results emerging the properties of particles other than the nucleon are summarized, highlighting selected hyperon and meson form factors.

Martha Constantinou

2014-11-01

189

Heat distribution error in radiometric calorimeters  

SciTech Connect

Calorimetric assay of plutonium and tritium is an important and well characterized measurement. The discussion of heat distribution error for radiometric calorimeters in relevant consensus standards is adequate for existing water bath calorimeters since they have a relatively flat response profile throughout the sample chamber. The development of transportable dry calorimeters has resulted in instruments with response profiles showing larger variations. This work describes the approach used to determine the heat distribution error term in the error models for two transportable dry calorimeters and recommends that this approach be used for all radiometric calorimeters and included in appropriate consensus standards. 7 refs.

Strohm, W.W. [EG and G Mound Applied Technologies, Miamisburg, OH (United States); Perry, R.B. [Argonne National Lab., IL (United States)

1991-12-31

190

Heat distribution error in radiometric calorimeters  

SciTech Connect

Calorimetric assay of plutonium and tritium is an important and well characterized measurement. The discussion of heat distribution error for radiometric calorimeters in relevant consensus standards is adequate for existing water bath calorimeters since they have a relatively flat response profile throughout the sample chamber. The development of transportable dry calorimeters has resulted in instruments with response profiles showing larger variations. This work describes the approach used to determine the heat distribution error term in the error models for two transportable dry calorimeters and recommends that this approach be used for all radiometric calorimeters and included in appropriate consensus standards. 7 refs.

Strohm, W.W. (EG and G Mound Applied Technologies, Miamisburg, OH (United States)); Perry, R.B. (Argonne National Lab., IL (United States))

1991-01-01

191

Performance of Glass Resistive Plate Chambers for a high granularity semi-digital calorimeter  

E-print Network

A new design of highly granular hadronic calorimeter using Glass Resistive Plate Chambers (GRPCs) with embedded electronics has been proposed for the future International Linear Collider (ILC) experiments. It features a 2-bit threshold semi-digital read-out. Several GRPC prototypes with their electronics have been successfully built and tested in pion beams. The design of these detectors is presented along with the test results on efficiency, pad multiplicity, stability and reproducibility.

M. Bedjidian; K. Belkadhi; V. Boudry; C. Combaret; D. Decotigny; E. Cortina Gil; C. de la Taille; R. Dellanegra; V. A. Gapienko; G. Grenier; C. Jauffret; R. Kieffer; M. -C. Fouz; R. Han; I. Laktineh; N. Lumb; K. Manai; S. Mannai; H. Mathez; L. Mirabito; J. Puerta Pelayo; M. Ruan; F. Schirra; N. Seguin-Moreau; W. Tromeur; M. Tytgat; M. Vander Donckt; N. Zaganidis

2010-11-27

192

The ATLAS zero degree calorimeter  

SciTech Connect

In May of 2009 the ATLAS zero degree calorimeter was installed in its initial configuration and integrated into the ATLAS trigger/daq. The detector was designed to measure Global characteristics of events - particularly in PbPb collisions - through the measurement of energy and position of very forward neutral particles. Here we discuss the design and tests - particularly of radiation hardness.

White, S.

2009-10-17

193

Improved Gradient Layer Animal Calorimeter  

Microsoft Academic Search

A rapidly responding gradient layer calorimetry system for experimental animals is described. Monitoring of radiant and evaporative components of heat loss is accomplished by separate heat exchange systems that employ thermoelectric heat flowmeters.Calibration and test results with the equipment show the following: The response to energy input is linear in both the radiant heat exchange system (radiant calorimeter thermopile) and

Phillip D. Quattrone

1965-01-01

194

ELECTRONICS FOR CALORIMETERS AT LHC.  

SciTech Connect

Some principal design features of front-end electronics for calorimeters in experiments at the LHC will be highlighted. Some concerns arising in the transition from the research and development and design phase to the construction will be discussed. Future challenges will be indicated.

RADEKA,V.

2001-09-11

195

On the structure of quadrilateral brane tilings  

NASA Astrophysics Data System (ADS)

Brane tilings provide the most general framework in string and M-theory for matching toric Calabi-Yau singularities probed by branes with superconformal fixed points of quiver gauge theories. The brane tiling data consists of a bipartite tiling of the torus which encodes both the classical superpotential and gauge-matter couplings for the quiver gauge theory. We consider the class of tilings which contain only tiles bounded by exactly four edges and present a method for generating any tiling within this class by iterating combinations of certain graph-theoretic moves. In the context of D3-branes in IIB string theory, we consider the effect of these generating moves within the corresponding class of supersymmetric quiver gauge theories in four dimensions. Of particular interest are their effect on the superpotential, the vacuum moduli space and the conditions necessary for the theory to reach a superconformal fixed point in the infrared. We discuss the general structure of physically admissible quadrilateral brane tilings and Seiberg duality in terms of certain composite moves within this class.

de Medeiros, Paul

2012-01-01

196

Penrose tilings as jammed solids.  

PubMed

Penrose tilings form lattices, exhibiting fivefold symmetry and isotropic elasticity, with inhomogeneous coordination much like that of the force networks in jammed systems. Under periodic boundary conditions, their average coordination is exactly four. We study the elastic and vibrational properties of rational approximants to these lattices as a function of unit-cell size N_{S} and find that they have of order sqrt[N_{S}] zero modes and states of self-stress and yet all their elastic moduli vanish. In their generic form, obtained by randomizing site positions, their elastic and vibrational properties are similar to those of particulate systems at jamming with a nonzero bulk modulus, vanishing shear modulus, and a flat density of states. PMID:25375746

Stenull, Olaf; Lubensky, T C

2014-10-10

197

Penrose Tilings as Jammed Solids  

NASA Astrophysics Data System (ADS)

Penrose tilings form lattices, exhibiting fivefold symmetry and isotropic elasticity, with inhomogeneous coordination much like that of the force networks in jammed systems. Under periodic boundary conditions, their average coordination is exactly four. We study the elastic and vibrational properties of rational approximants to these lattices as a function of unit-cell size NS and find that they have of order ?NS zero modes and states of self-stress and yet all their elastic moduli vanish. In their generic form, obtained by randomizing site positions, their elastic and vibrational properties are similar to those of particulate systems at jamming with a nonzero bulk modulus, vanishing shear modulus, and a flat density of states.

Stenull, Olaf; Lubensky, T. C.

2014-10-01

198

Brane Tilings and Reflexive Polygons  

E-print Network

Reflexive polygons have attracted great interest both in mathematics and in physics. This paper discusses a new aspect of the existing study in the context of quiver gauge theories. These theories are 4d supersymmetric worldvolume theories of D3 branes with toric Calabi-Yau moduli spaces that are conveniently described with brane tilings. We find all 30 theories corresponding to the 16 reflexive polygons, some of the theories being toric (Seiberg) dual to each other. The mesonic generators of the moduli spaces are identified through the Hilbert series. It is shown that the lattice of generators is the dual reflexive polygon of the toric diagram. Thus, the duality forms pairs of quiver gauge theories with the lattice of generators being the toric diagram of the dual and vice versa.

Amihay Hanany; Rak-Kyeong Seong

2012-01-12

199

Hadronic interactions in the MINOS detectors  

NASA Astrophysics Data System (ADS)

MINOS, the Main Injector Neutrino Oscillation Search, will study neutrino flavor transformations using a Near detector at the Fermi National Accelerator Laboratory and a Far detector located in the Soudan Underground Laboratory in northern Minnesota. The MINOS collaboration also constructed the Ca1Det (calibration detector), a smaller version of the Near and Far detectors, to determine the topological and signal response to hadrons, electrons and muons. The detector was exposed to test-beams in the CERN Proton Synchrotron East Hall during 2001--2003, where it collected events at momentum settings between 200 MeV/c and 10 GeV/c. In this dissertation we present results of the Ca1Det experiment, focusing on the topological and signal response to hadrons. We briefly describe the MINOS experiment and its vi iron-scintillator tracking-sampling calorimeters as a motivation for the CalDet experiment. We discuss the operation of the CalDet in the beamlines as well as the trigger and particle identification systems used to isolate the hadron sample. The method used to calibrate the MINOS detectors is described and validated with test-beam data. The test-beams were simulated to model the muon flux, energy loss upstream of the detector and the kaon background. We describe the procedure used to discriminate between pions and muons on the basis of the event topology. The hadron samples were used to benchmark the existing GEANT3 based hadronic shower codes and determine the detector response and resolution for pions and protons. We conclude with comments on the response to single hadrons and to neutrino induced hadronic showers.

Kordosky, Michael Alan

200

Fibrous-Ceramic/Aerogel Composite Insulating Tiles  

NASA Technical Reports Server (NTRS)

Fibrous-ceramic/aerogel composite tiles have been invented to afford combinations of thermal-insulation and mechanical properties superior to those attainable by making tiles of fibrous ceramics alone or aerogels alone. These lightweight tiles can be tailored to a variety of applications that range from insulating cryogenic tanks to protecting spacecraft against re-entry heating. The advantages and disadvantages of fibrous ceramics and aerogels can be summarized as follows: Tiles made of ceramic fibers are known for mechanical strength, toughness, and machinability. Fibrous ceramic tiles are highly effective as thermal insulators in a vacuum. However, undesirably, the porosity of these materials makes them permeable by gases, so that in the presence of air or other gases, convection and gas-phase conduction contribute to the effective thermal conductivity of the tiles. Other disadvantages of the porosity and permeability of fibrous ceramic tiles arise because gases (e.g., water vapor or cryogenic gases) can condense in pores. This condensation contributes to weight, and in the case of cryogenic systems, the heat of condensation undesirably adds to the heat flowing to the objects that one seeks to keep cold. Moreover, there is a risk of explosion associated with vaporization of previously condensed gas upon reheating. Aerogels offer low permeability, low density, and low thermal conductivity, but are mechanically fragile. The basic idea of the present invention is to exploit the best features of fibrous ceramic tiles and aerogels. In a composite tile according to the invention, the fibrous ceramic serves as a matrix that mechanically supports the aerogel, while the aerogel serves as a low-conductivity, low-permeability filling that closes what would otherwise be the open pores of the fibrous ceramic. Because the aerogel eliminates or at least suppresses permeation by gas, gas-phase conduction, and convection, the thermal conductivity of such a composite even at normal atmospheric pressure is not much greater than that of the fibrous ceramic alone in a vacuum.

White, Susan M.; Rasky, Daniel J.

2004-01-01

201

The lead-glass electromagnetic calorimeters for the magnetic spectrometers in Hall C at Jefferson Lab  

E-print Network

The electromagnetic calorimeters of the various magnetic spectrometers in Hall C at Jefferson Lab are presented. For the existing HMS and SOS spectrometers design considerations, relevant construction information, and comparisons of simulated and experimental results are included. The energy resolution of the HMS and SOS calorimeters is better than $\\sigma/E \\sim 6%/\\sqrt E $, and pion/electron ($\\pi/e$) separation of about 100:1 has been achieved in energy range 1 -- 5 GeV. Good agreement has been observed between the experimental and simulated energy resolutions, but simulations systematically exceed experimentally determined $\\pi^-$ suppression factors by close to a factor of two. For the SHMS spectrometer presently under construction details on the design and accompanying GEANT4 simulation efforts are given. The anticipated performance of the new calorimeter is predicted over the full momentum range of the SHMS. Good electron/hadron separation is anticipated by combining the energy deposited in an initial (preshower) calorimeter layer with the total energy deposited in the calorimeter.

H. Mkrtchyan; R. Carlini; V. Tadevosyan; J. Arrington; A. Asaturyan; M. E. Christy; D. Dutta; R. Ent; H. C. Fenker; D. Gaskell; T. Horn; M. K. Jones; C. E. Keppel; D. J. Mack; S. P. Malace; A. Mkrtchyan; M. I. Niculescu; J. Seely; V. Tvaskis; S. A. Wood; S. Zhamkochyan

2012-04-28

202

Cube Tilings of R n and Nonlinear Codes  

E-print Network

Cube Tilings of R n and Nonlinear Codes Jeffrey C. Lagarias Peter W. Shor AT&T Bell Laboratories cubes are constructed. These tilings are specializations of certain families of nonlinear codes over GF(2). These cube-tilings provide building blocks for the construction of cube-tilings such that no two

Shor, Peter W.

203

Remotely replaceable tokamak plasma limiter tiles  

DOEpatents

U-shaped tiles placed end-to-end over a pair of parallel runners have two rods which engage L-shaped slots. A sliding bar between the runners has grooves with clips to retain the rods pressed into receiving legs of the L-shaped slots in the runners. Sliding the bar in the direction of retaining legs of the L-shaped slots latches the tiles in place over the wall. Resilient contact strips under the parallel sides of the U-shaped tile assure thermal and electrical contact with the wall. 6 figs.

Gallix, R.

1987-12-09

204

Compressing random microstructures via stochastic Wang tilings.  

PubMed

This Rapid Communication presents a stochastic Wang tiling-based technique to compress or reconstruct disordered microstructures on the basis of given spatial statistics. Unlike the existing approaches based on a single unit cell, it utilizes a finite set of tiles assembled by a stochastic tiling algorithm, thereby allowing to accurately reproduce long-range orientation orders in a computationally efficient manner. Although the basic features of the method are demonstrated for a two-dimensional particulate suspension, the present framework is fully extensible to generic multidimensional media. PMID:23214516

Novák, Jan; Ku?erová, Anna; Zeman, Jan

2012-10-01

205

Progress in Hadronic Physics Modelling in Geant4  

SciTech Connect

Geant4 offers a set of models to simulate hadronic showers in calorimeters. Recent improvements to several models relevant to the modelling of hadronic showers are discussed. These include improved cross sections, a revision of the FTF model, the addition of quasi-elastic scattering to the QGS model, and enhancements in the nuclear precompound and de-excitation models. The validation of physics models against thin target experiments has been extended especially in the energy region 10 GeV and below. Examples of new validation results are shown.

Apostolakis, John; /CERN; Folger, Gunter; /CERN; Grichine, Vladimir; /CERN; Heikkinen, Aatos; /Helsinki Inst. of Phys.; Howard, Alexander; /CERN; Ivanchenko, Vladimir; /CERN; Kaitaniemi, Pekka; /Helsinki Inst. of Phys.; Koi, Tatsumi; /SLAC; Kosov, Mikhail; /CERN /Moscow, ITEP; Quesada, Jose Manuel; /Seville U.; Ribon, Alberto; /CERN; Uzhinsky, Vladimir; /CERN; Wright, Dennis; /SLAC

2011-11-28

206

The use of waste ceramic tile in cement production  

SciTech Connect

In ceramic tile production, because of various reasons, unsold fired products come out. These are waste tiles and only a little part of them are used. Remainings create environmental problems. If these waste tiles are used in cement production, this pollution decreases. In this study, usage of waste tile as pozzolan was studied. Waste tile was added into Portland cement in 25%, 30%, 35%, and 40% weight ratios. Pozzolanic properties of waste tile and setting time, volume stability, particle size, density, specific surface area, and strength of cement including waste tile were investigated. The test results indicated that the waste tiles show pozzolanic properties, and chemical and physical properties of the cement including tile conforms to cement standard up to the addition of 35% waste tile.

Ay, N.; Uenal, M.

2000-03-01

207

Development of GEM-Based Digital Hadron Calorimetry Using the SLAC KPiX Chip  

SciTech Connect

The development of Digital Hadron Calorimetry for the SiD detector Concept for the International Linear Collider is described. The jet energy requirements of the ILC physics program are discussed. The concept of GEM-based digital hadron calorimetry is presented, followed by a description of, and results from, prototype detectors. Plans are described for the construction of 1m{sup 2} GEM-DHCAL planes to be tested as part of a future calorimeter stack.

White, A.; /Texas U., Arlington /Washington U., Seattle /Unlisted /SLAC

2012-04-12

208

Higher genus Soccer Balls andHigher genus Soccer Balls and Kaleidoscopic Tilings in theKaleidoscopic Tilings in the  

E-print Network

1 Higher genus Soccer Balls andHigher genus Soccer Balls and Kaleidoscopic Tilings in the;2 OutlineOutline · Talk 1 The relation between higher genus soccer balls and the kaleidoscopic tilings with undergraduates #12;3 First Talk: Soccer Ball and TilingsFirst Talk: Soccer Ball and Tilings · Analyze soccer ball

Broughton, S. Allen

209

Beam tests of directly coupled scintillator tiles with MPPC readout  

NASA Astrophysics Data System (ADS)

We report on the response to a proton beam of scintillator tiles directly coupled at the face of the tile to multi-pixel photon counters. Detailed measurements with protons show that flat tiles have high response near the photon counters while concave tiles have uniform response suggesting that tiles with this versatile configuration can be tailored to a desired uniformity. The beam response is in qualitative agreement with the response to a non-triggered radioactive source and reveals additional spatial features.

Abu-Ajamieh, F.; Blazey, G.; Cole, S.; Dyshkant, A.; Hedin, D.; Johnson, E.; Viti, I.; Zutshi, V.; Ramberg, E.; Rivera, R.; Rubinov, P.; Turqueti, M.; Uplegger, L.; Demarteau, M.; Francis, K.

2011-12-01

210

A family of ternary decagonal tilings  

E-print Network

A new family of decagonal quasiperiodic tilings are constructed by the use of generalized point substitution processes, which is a new substitution formalism developed by the author [N. Fujita, Acta Cryst. A 65, 342 (2009)]. These tilings are composed of three prototiles: an acute rhombus, a regular pentagon and a barrel shaped hexagon. In the perpendicular space, these tilings have windows with fractal boundaries, and the windows are analytically derived as the fixed sets of the conjugate maps associated with the relevant substitution rules. It is shown that the family contains an infinite number of local isomorphism classes which can be grouped into several symmetry classes (e.g., $C_{10}$, $D_5$, etc.). The member tilings are transformed into one another through collective simpleton flips, which are associated with the reorganization in the window boundaries.

Fujita, Nobuhisa

2009-01-01

211

A family of ternary decagonal tilings  

E-print Network

A new family of decagonal quasiperiodic tilings are constructed by the use of generalized point substitution processes, which is a new substitution formalism developed by the author [N. Fujita, Acta Cryst. A 65, 342 (2009)]. These tilings are composed of three prototiles: an acute rhombus, a regular pentagon and a barrel shaped hexagon. In the perpendicular space, these tilings have windows with fractal boundaries, and the windows are analytically derived as the fixed sets of the conjugate maps associated with the relevant substitution rules. It is shown that the family contains an infinite number of local isomorphism classes which can be grouped into several symmetry classes (e.g., $C_{10}$, $D_5$, etc.). The member tilings are transformed into one another through collective simpleton flips, which are associated with the reorganization in the window boundaries.

Nobuhisa Fujita

2009-11-27

212

Manufacture of ceramic tiles from fly ash  

DOEpatents

The present invention relates to a process for forming glass-ceramic tiles. Fly ash containing organic material, metal contaminants, and glass forming materials is oxidized under conditions effective to combust the organic material and partially oxidize the metallic contaminants and the glass forming materials. The oxidized glass forming materials are vitrified to form a glass melt. This glass melt is then formed into tiles containing metallic contaminants. 6 figs.

Hnat, J.G.; Mathur, A.; Simpson, J.C.

1999-08-10

213

Manufacture of ceramic tiles from fly ash  

DOEpatents

The present invention relates to a process for forming glass-ceramic tiles. Fly ash containing organic material, metal contaminants, and glass forming materials is oxidized under conditions effective to combust the organic material and partially oxidize the metallic contaminants and the glass forming materials. The oxidized glass forming materials are vitrified to form a glass melt. This glass melt is then formed into tiles containing metallic contaminants.

Hnat, James G. (Collegeville, PA); Mathur, Akshay (Tampa, FL); Simpson, James C. (Perkiomenville, PA)

1999-01-01

214

Electromagnetic calorimeter trigger at Belle  

NASA Astrophysics Data System (ADS)

The performance of CsI(T?) electromagnetic calorimeter trigger system in the Belle experiment is described. Two kinds of trigger schemes have been taken into account, namely a total energy trigger and a cluster counting trigger which are complementary to each other. In addition, the system has provided the online/offline luminosity information using the Bhabha event trigger scheme. An upgrade of the trigger is discussed.

Cheon, B. G.; Kim, Hee-Jong; Lee, S. H.; Won, E.; Park, I. C.; Hur, T. W.; Park, C. S.; Kim, S. K.; Kim, H. J.; Kim, H. O.; Chu, T. H.; Usov, Yu. V.; Aulchenko, V. M.; Kuzmin, A. S.; Bondar, A. E.; Shwartz, B.; Eidelman, S.; Krokovny, P.; Hayashii, H.; Sagawa, H.; Fukushima, M.

2002-11-01

215

Quasicrystalline tilings with nematic colloidal platelets  

PubMed Central

Complex nematic fluids have the remarkable capability for self-assembling regular colloidal structures of various symmetries and dimensionality according to their micromolecular orientational order. Colloidal chains, clusters, and crystals were demonstrated recently, exhibiting soft-matter functionalities of robust binding, spontaneous chiral symmetry breaking, entanglement, shape-driven and topological driven assembly, and even memory imprinting. However, no quasicrystalline structures were found. Here, we show with numerical modeling that quasicrystalline colloidal lattices can be achieved in the form of original Penrose P1 tiling by using pentagonal colloidal platelets in layers of nematic liquid crystals. The tilings are energetically stabilized with binding energies up to 2500 kBT for micrometer-sized platelets and further allow for hierarchical substitution tiling, i.e., hierarchical pentagulation. Quasicrystalline structures are constructed bottom-up by assembling the boat, rhombus, and star maximum density clusters, thus avoiding other (nonquasicrystalline) stable or metastable configurations of platelets. Central to our design of the quasicrystalline tilings is the symmetry breaking imposed by the platelet shape and the surface anchoring conditions at the colloidal platelets, which are misaligning and asymmetric over two perpendicular mirror planes. Finally, the design of the quasicrystalline tilings as platelets in nematic liquid crystals is inherently capable of a continuous variety of length scales of the tiling, ranging over three orders of magnitude in the typical length (from to ), which could allow for the design of quasicrystalline photonics at multiple frequency ranges. PMID:24550269

Dontabhaktuni, Jayasri; Ravnik, Miha; Zumer, Slobodan

2014-01-01

216

Frontend Electronics for the ATLAS Tile Calorimeter K. Anderson, J. Pilcher, H. Sanders, F. Tang  

E-print Network

, located inside the steel shield of each PMT block. The 3­in­1 card provides the following functions dynamic range of the system. A block diagram of the system is shown in Figure 1. Bi­gain Analog Circuitry between scales and corre­ Fig. 1: Block diagram of front­end electronics. #12; ­2­ sponds to 3

217

Status of the ATLAS Liquid Argon Calorimeter and its Performance after Three Years of LHC Operation  

NASA Astrophysics Data System (ADS)

The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider(LHC) at CERN. Liquid argon sampling calorimeters are used for all electromagnetic calorimetry covering the pseudo-rapidity region up to 3.2, as well as for hadron calorimetry in the range 1.5-4.9. The electromagnetic calorimeters use lead as passive material and are characterised by an accordion geometry that allows a fast and uniform azimuthal response without any gap. Copper and tungsten were chosen as passive material for the hadron calorimetry; whereas a classic plate geometry was adopted at large polar angles, an innovative one based on cylindrical electrodes with thin argon gaps was designed for the coverage at low angles, where the particles flow is higher. All detectors are housed in three cryostats kept at approximately 89 K. After installation in 2004-2006, the calorimeters were extensively commissioned over the three-year period prior to first collisions in 2009, using cosmic rays and single LHC beams. Since then, around 27 fb-1 of data have been collected at centre of mass energies of 7-8 TeV. During all these stages, the calorimeter has been operating almost optimally, with performance very close to specifications. The talk will cover all aspects of these first years of operation, including the calibration efforts and the data quality assessment procedure. The excellent performance achieved will also be briefly reviewed, especially in the context of the recently announced discovery of the Higgs boson.

Lampl, W.

2014-06-01

218

Mechanical Design of the DAMPE BGO Calorimeter  

NASA Astrophysics Data System (ADS)

The Dark Matter Particle Explorer, DAMPE, is a new designed satellite developed for the CASs new Innovation 2020 program. As the main component of DAMPE, the new designed BGO calorimeter consists of 308 BGO Crystals coupled with photomultiplier tube.The reliability and safety of the BGO Calorimeter structure play a very important role in the operation of whole detector. During the rocket launch, the calorimeter structure should be stable against vibration and environmental factors to ensure detector works in good conditions. In this article, we make the BGO calorimeter structure design, and then prove that it will work in the environments of rocket launch and flight.

Hu, Yiming; Wu, Jian; Feng, Changqing; Zhang, Yunlong; Chen, Dengyi; Chang, Jin

219

Performance of a liquid argon Accordion calorimeter with fast readout  

NASA Astrophysics Data System (ADS)

A prototype lead-liquid-argon electromagnetic calorimeter with parallel plates and Accordion geometry has been equipped with high speed readout electronics and tested with electron and muon beams at the CERN SPS. For a response peaking time of about 35 ns, fast enough for operation at the future hadron colliders, the energy resolution for electrons is 9.6%/? E[GeV] with a local constant term of 0.3% and a noise contribution of {0.33}/{E[ GeV] }. The spatial accuracy achieved with a detector granularity of 2.7 cm is {3.7 mm}/{E[ GeV] } and the angular resolution 12 mrad at 60 GeV.

Aubert, B.; Bazan, A.; Beaugiraud, B.; Colas, J.; Leflour, T.; Maire, M.; Vialle, J. P.; Wingerter-Seez, I.; Zolnierowski, Y. P.; Gordon, H. A.; Radeka, V.; Rahm, D.; Stephani, D.; Chevalley, J. L.; Fabjan, C. W.; Fournier, D.; Franz, A.; Gildemeister, O.; Jenni, P.; Nessi, M.; Nessi-Tedaldi, F.; Pepe, M.; Richter, W.; Soderqvist, J.; Baze, J. M.; Gosset, L.; Lavocat, P.; Lottin, J. P.; Mansoulie, B.; Meyer, J. P.; Renardy, J. F.; Teiger, J.; Zaccone, H.; Battistoni, G.; Camin, D. V.; Cavalli, D.; Costa, G.; Cravero, A.; Ferrari, A.; Gianotti, F.; Mandelli, L.; Mazzanti, M.; Perini, L.; Pessina, G.; Sala, P.; Sciamanna, M.; Augé, E.; Chase, R.; Chollet, J. C.; de la Taille, C.; Fayard, L.; Jean, P.; Iconomidou-Fayard, L.; Merkel, B.; Noppe, J. M.; Parrour, G.; Pétroff, P.; Repellin, J. P.; Schaffer, A.; Seguin, N.; Unal, G.; Fuglesang, C.; Lefebvre, M.; Towers, S.

1992-10-01

220

Timing resolution of Shisk-Kebab'' lead scintillator sandwich calorimeters  

SciTech Connect

We have constructed lead scintillator sandwich calorimeters with 1/4 [chi][sub o] sampling frequency and total thickness [approximately]16[chi][sub o]. The 4 mm thick scintillator plates are read out by wavelength shifter fibers 1 mm in diameter which pass through holes penetrating the plates on a .95 cm [times] .95 cm grid (Shish-Kebab geometry). We tested these modules in the A2 test beam at Brookhaven using low energy electrons and hadrons. Results are here presented on electron energy and time-of-flight resolution obtained with various combinations of scintillators and wavelength shifters. We also describe results on e/[pi] separation obtained with a new technique for the longitudinal segmentation.

Kistenev, E.; White, S. (Brookhaven National Lab., Upton, NY (United States)); Pischalnikov, Y.; Protopopov, Y.; Rykalin, V. (Institut Fiziki Vysokikh Ehnergij, Protvino (Russian Federation))

1992-01-01

221

Timing resolution of ``Shisk-Kebab`` lead scintillator sandwich calorimeters  

SciTech Connect

We have constructed lead scintillator sandwich calorimeters with 1/4 {chi}{sub o} sampling frequency and total thickness {approximately}16{chi}{sub o}. The 4 mm thick scintillator plates are read out by wavelength shifter fibers 1 mm in diameter which pass through holes penetrating the plates on a .95 cm {times} .95 cm grid (Shish-Kebab geometry). We tested these modules in the A2 test beam at Brookhaven using low energy electrons and hadrons. Results are here presented on electron energy and time-of-flight resolution obtained with various combinations of scintillators and wavelength shifters. We also describe results on e/{pi} separation obtained with a new technique for the longitudinal segmentation.

Kistenev, E.; White, S. [Brookhaven National Lab., Upton, NY (United States); Pischalnikov, Y.; Protopopov, Y.; Rykalin, V. [Institut Fiziki Vysokikh Ehnergij, Protvino (Russian Federation)

1992-12-31

222

Lessons from Monte Carlo simulations of the performance of a dual-readout fiber calorimeter  

NASA Astrophysics Data System (ADS)

The RD52 calorimeter uses the dual-readout principle to detect both electromagnetic and hadronic showers, as well as muons. Scintillation and Cherenkov light provide the two signals which, in combination, allow for superior hadronic performance. In this paper, we report on detailed, GEANT4 based Monte Carlo simulations of the performance of this instrument. The results of these simulations are compared in great detail to measurements that have been carried out and published by the DREAM Collaboration. This comparison makes it possible to understand subtle details of the shower development in this unusual particle detector. It also allows for predictions of the improvement in the performance that may be expected for larger detectors of this type. These studies also revealed some inadequacies in the GEANT4 simulation packages, especially for hadronic showers, but also for the Cherenkov signals from electromagnetic showers.

Akchurin, N.; Bedeschi, F.; Cardini, A.; Cascella, M.; De Pedis, D.; Ferrari, R.; Fracchia, S.; Franchino, S.; Fraternali, M.; Gaudio, G.; Genova, P.; Hauptman, J.; La Rotonda, L.; Lee, S.; Livan, M.; Meoni, E.; Pinci, D.; Policicchio, A.; Saraiva, J. G.; Scuri, F.; Sill, A.; Venturelli, T.; Wigmans, R.

2014-10-01

223

Influence of radiation damage on the performance of a lead/scintillator calorimeter investigated with 1-6 GeV electrons  

NASA Astrophysics Data System (ADS)

The influence of radiation damage on energy resolution, linearity and uniformity of an electromagnetic lead/scintillator calorimeter was studied experimentally with 1-6 GeV electrons. Plastic scintillators and wavelength shifter bars were irradiated uniformly with ? rays. Both were identical with those of the ZEUS uranium calorimeter. The attenuation length of the scintillators was determined from bench tests of single scintillator tiles and from beam tests of the whole calorimeter. After exposure to a dose of 10 kGy the attenuation length of the scintillators decreased by a factor of 2. The experimental results show that the irradiation of the nearly 2 m long wavelength shifter bars affects the calorimeter much more than the damage of the scintillators which were only 19 cm long. Damaged and undamaged sections of the calorimeter were scanned with a moving radioactive ? source ( 60Co). The results demonstrate that the 60Co monitor system is a very precise tool to detect radiation damage in a sampling calorimeter.

Bohnet, I.; Kummerow, D.; Wick, K.

2002-09-01

224

The electromagnetic calorimeter of cms, summary and status  

NASA Astrophysics Data System (ADS)

The construction of the lead tungstate crystal calorimeter for the CMS experiment at the Large Hadron Collider (LHC) is close to completion. The barrel part of the calorimeter composed of 61200 crystals is installed and operated inside CMS. Only 102 readout channels are problematic including the 21 entirely dead, corresponding to 0.17 % and 0.034 %, respectively. All 14648 end-cap crystals are mounted. The electronics installation and commissioning of one end-cap has finished and the second will be finished in few weeks. The construction of the pre-shower detectors installed in front of the end-caps is well advanced. The many challenges of the design and construction imposed by a 4 Tesla magnetic field, radiation levels ranging from 100 krad up to several Mrad and a bunch crossing rate of 40 MHz were mastered by a huge effort in developing and testing appropriate crystals, photo-detectors and readout electronics carried out over the past ~ 15 years. Test beam results demonstrate that the energy resolution obtained is better than 0.5 % at high energies. All readout channels in the barrel are inter-calibrated to better than 2% using cosmic muons.

Lustermann, Werner; CMS ECAL Group

2009-04-01

225

TileQC: A system for tile-based quality control of Solexa data  

PubMed Central

Background Next-generation DNA sequencing technologies such as Illumina's Solexa platform and Roche's 454 approach provide new avenues for investigating genome-scale questions. However, they also present novel analytical challenges that must be met for their effective application to biological questions. Results Here we report the availability of tileQC, a tile-based quality control system for Solexa data written in the R language. TileQC provides a means of recognizing bias and error in Solexa output by graphically representing data generated by flow cell tiles. The data represented in the images is then made available in the R environment for further analysis and automation of error detection. Conclusion TileQC offers a highly adaptable and powerful tool for the quality control of Solexa-based DNA sequence data. PMID:18507856

Dolan, Peter C; Denver, Dee R

2008-01-01

226

Dynamic Moire methods for detection of loosened space shuttle tiles  

NASA Astrophysics Data System (ADS)

Moire fringe methods for detecting loose space shuttle tiles were investigated with a test panel consisting of a loose tile surrounded by four securely bonded tiles. The test panel was excited from 20 to 150 Hz with in-plane sinusoidal acceleration of 2 g (peak). If the shuttle orbiter can be subjected to periodic excitation of 1 to 2 g (peak) and rigid-body periodic displacements do not mask the change in the Moire pattern due to tile looseness, then the use of projected Moire fringes to detect out-of-plane rockin appears to be the most viable indicator of tile looseness since no modifications to the tiles are required.

Snow, W. L.; Burner, A. W.; Goad, W. K.

1981-09-01

227

TAAPP: Tiling Array Analysis Pipeline for Prokaryotes.  

PubMed

High-density tiling arrays provide closer view of transcription than regular microarrays and can also be used for annotating functional elements in genomes. The identified transcripts usually have a complex overlapping architecture when compared to the existing genome annotation. Therefore, there is a need for customized tiling array data analysis tools. Since most of the initial tiling arrays were conducted in eukaryotes, data analysis methods are well suited for eukaryotic genomes. For using whole-genome tiling arrays to identify previously unknown transcriptional elements like small RNA and antisense RNA in prokaryotes, existing data analysis tools need to be tailored for prokaryotic genome architecture. Furthermore, automation of such custom data analysis workflow is necessary for biologists to apply this powerful platform for knowledge discovery. Here we describe TAAPP, a web-based package that consists of two modules for prokaryotic tiling array data analysis. The transcript generation module works on normalized data to generate transcriptionally active regions (TARs). The feature extraction and annotation module then maps TARs to existing genome annotation. This module further categorizes the transcription profile into potential novel non-coding RNA, antisense RNA, gene expression and operon structures. The implemented workflow is microarray platform independent and is presented as a web-based service. The web interface is freely available for academic use at http://lims.lsbi.mafes.msstate.edu/TAAPP-HTML/. PMID:21641563

Kumar, Ranjit; Burgess, Shane C; Lawrence, Mark L; Nanduri, Bindu

2011-04-01

228

Tiled WMS/KML Server V2  

NASA Technical Reports Server (NTRS)

This software is a higher-performance implementation of tiled WMS, with integral support for KML and time-varying data. This software is compliant with the Open Geospatial WMS standard, and supports KML natively as a WMS return type, including support for the time attribute. Regionated KML wrappers are generated that match the existing tiled WMS dataset. Ping and JPG formats are supported, and the software is implemented as an Apache 2.0 module that supports a threading execution model that is capable of supporting very high request rates. The module intercepts and responds to WMS requests that match certain patterns and returns the existing tiles. If a KML format that matches an existing pyramid and tile dataset is requested, regionated KML is generated and returned to the requesting application. In addition, KML requests that do not match the existing tile datasets generate a KML response that includes the corresponding JPG WMS request, effectively adding KML support to a backing WMS server.

Plesea, Lucian

2012-01-01

229

Endcap Calorimeter/Vessel Calculations  

SciTech Connect

The end cap calorimeters's cryostate is composed of two vessels; one nested inside the other. Figure 1 shows a simplified sketch of the nested vessels. Drawings 3740.220-MD-222076 Rev. A shows the details of the inner vessel. Drawing 3740.220-MD-222075 Rev. A shows the details of the outer vessel. As shown in figure 1, the cryostate consists of ten different geometric parts. The parts labeled 1-4 are cylindrical shells, the parts labeled 5 and 6 are common torispherical heads and the parts labeled 7-10 are unique heads.

Krempetz, K.; /Fermilab

1986-01-01

230

Redesigning the rotating-bomb combustion calorimeter  

Microsoft Academic Search

In order to obtain reliable data of the standard enthalpy of combustion of compounds containing sulfur or halogen atoms, a new calorimetric rotating-bomb system has been set up. Around a platinum lining Parr 1004 C combustion bomb, an isoperibolic calorimeter has been designed, constructed and tested. The calorimeter was calibrated by using standard benzoic acid and the resulting equivalent in

Henoc Flores; Juan Mentado; Patricia Amador; Luis Alfonso Torres; Myriam Campos; Aarón Rojas

2006-01-01

231

Performance of a uranium liquid argon calorimeter  

SciTech Connect

We present results on the performance of a uranium and liquid argon calorimeter in the NW test beam at Fermilab. We describe the calorimeter, and discuss its performance with electrons, pions and muons from 10 GeV to 150 GeV. The performance perameters measured include response, linearity, resolution, compensation, and e/..pi.. separation.

Tuts, P.M.

1986-01-01

232

An electromagnetic shashlik calorimeter with longitudinal segmentation  

E-print Network

A novel technique for longitudinal segmentation of shashlik calorimeters has been tested in the CERN West Area beam facility. A 25 tower very fine samplings e.m. calorimeter has been built with vacuum photodiodes inserted in the first 8 radiation lengths to sample the initial development of the shower. Results concerning energy resolution, impact point reconstruction and electron/pion separation are reported.

CALEIDO collaboration; A. C. Benvenuti; I. Britvich; T. Camporesi; P. Checchia; A. Feniouk; V. Hedberg; V. Lishin; M. Margoni; M. Mazzucato; V. Obraztsov; M. Paganoni; V. Poliakov; F. Simonetto; F. Terranova; E. Vlasov

1999-02-06

233

5.8 X-ray Calorimeters  

NASA Technical Reports Server (NTRS)

X-ray calorimeter instruments for astrophysics have seen rapid development since they were invented in 1984. The prime instrument on all currently planned X-ray spectroscopic observatories is based on calorimeter technology. This relatively simple detection concept that senses the energy of an incident photon by measuring the temperature rise of an absorber material at very low temperatures, can form the basis of a very high performance, non-dispersive spectrometer. State-of-the-art calorimeter instruments have resolving powers of over 3000, large simultaneous band-passes, and near unit efficiency. This coupled with the intrinsic imaging capability of a pixilated x-ray calorimeter array, allows true spectral-spatial instruments to be constructed. In this chapter I briefly review the detection scheme, the state-of-the-art in X-ray calorimeter instruments and the future outlook for this technology.

Porter, F. Scott

2008-01-01

234

Perspectives in hadron spectroscopy  

E-print Network

A brief survey is presented of selected recent results in hadron spectroscopy and related theoretical studies. This includes the pentaquarks and hadrons containing one or two charmed quarks or antiquarks.

J. M. Richard

2005-11-17

235

Performance of the ATLAS Liquid Argon Calorimeter after three years of LHC operation and plans for a future upgrade  

NASA Astrophysics Data System (ADS)

The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Liquid Argon sampling calorimeters are used for all electromagnetic calorimetry covering the pseudorapidity region up to 3.2, as well as for hadronic calorimetry in the range 1.4-4.9. The electromagnetic calorimeters use lead as passive material and are characterized by an accordion geometry that allows a fast and uniform azimuthal response. Copper and tungsten were chosen as passive material for the hadronic calorimetry; whereas a parallel plate geometry was adopted at large polar angles, an innovative one based on cylindrical electrodes with thin argon gaps was designed for the coverage at low angles, where the particles flow is higher. All detectors are housed in three cryostats kept at 88.5 K. After installation in 2004-2006, the calorimeters were extensively commissioned over the three years period prior to first collisions in 2009, using cosmic rays and single LHC beams. Since then, around 27 fb-1 of data have been collected at a unprecedented center of mass energies between 7 TeV and 8 TeV. During all these stages, the calorimeter and its electronics have been operating with performances very close to the specification ones. After 2019, the instantaneous luminosity will reach 2-3 × 1034 cm-2s-1, well above the luminosity for which the calorimeter was designed. In order to preserve its triggering capabilities, the detector will be upgraded with a new fully digital trigger system with a refined granularity. In 2023, the instantaneous luminosity will ultimately reach 5-7 × 1034 cm-2s-1, requiring a complete replacement of the readout electronics. Moreover, with an increased particle flux, several phenomena (liquid argon boiling, space charge effects...) will affect the performance of the forward calorimeter (FCal). A replacement with a new FCal with smaller LAr gaps or a new calorimeter module are considered. The performance of these new calorimeters is being studied in highest intensity particle beams. This contribution covers all aspects of the first three years of operation. The excellent performance achieved is especially detailed in the context of the discovery of the Higgs boson announced in July 2012. The future plans to preserve this performance until the end of the LHC program are also presented.

Strizenec, P.

2014-09-01

236

Remotely replaceable tokamak plasma limiter tiles  

DOEpatents

U-shaped limiter tiles placed end-to-end over a pair of parallel runners secured to a wall have two rods which engage L-shaped slots in the runners. The short receiving legs of the L-shaped slots are perpendicular to the wall and open away from the wall, while long retaining legs are parallel to and adjacent the wall. A sliding bar between the runners has grooves with clips to retain the rods pressed into receiving legs of the L-shaped slots in the runners. Sliding the bar in the direction of retaining legs of the L-shaped slots latches the tiles in place over the runners. Resilient contact strips between the parallel arms of the U-shaped tiles and the wall assure thermal and electrical contact with the wall.

Tsuo, Simon (Lakewood, CO), Langford, Alison A. (Boulder, CO)

1989-01-01

237

Nematic colloidal tilings as photonic materials  

NASA Astrophysics Data System (ADS)

Colloidal platelets are explored as elementary building blocks for the shape-controlled assembly of crystalline and quasicrystalline tilings. Using three-dimensional (3D) numerical modelling based on the minimization of Landau-de Gennes free energy for modelling of colloids combined with Finite Difference Time Domain calculations for optics, we demonstrate the self-assembly and optical (transmission) properties of triangular, square and pentagonal sub-micrometer sized platelets in a thin layer of nematic liquid crystal. Interactions between platelets are explored, providing an insight into the assembly process. Two-dimensional tilings of various-shaped colloidal platelets are demonstrated, and their use as diffraction layers is explored by using FDTD simulations. Designing symmetry-breaking surface anchoring profiles on pentagonal platelets opens also a possibility to achieve interactions that could lead to tilings with non-crystalline symmetry.

Ravnik, M.; Dontabhaktuni, J.; Cancula, M.; Zumer, S.

2014-02-01

238

QCD in hadron-hadron collisions  

SciTech Connect

Quantum Chromodynamics provides a good description of many aspects of high energy hadron-hadron collisions, and this will be described, along with some aspects that are not yet understood in QCD. Topics include high E{sub T} jet production, direct photon, W, Z and heavy flavor production, rapidity gaps and hard diffraction.

Albrow, M.

1997-03-01

239

AIRBORNE ASBESTOS CONCENTRATIONS DURING BUFFING OF RESILIENT FLOOR TILE  

EPA Science Inventory

Although asbestos-containing resilient floor tiles are considered nonfriable, the frictional forces exerted on the tile during routine maintenance operations can generate asbestos-containing structures. tudy was conducted to determine the level of airborne asbestos concentrations...

240

Issues in the analysis of oligonucleotide tiling microarrays  

E-print Network

probes is termed the `step' or `resolution' of the tiling. Each probe on a tiling array interrogates to support the effort. Analytical techniques for such arrays typically follow that of other PCR product

Gerstein, Mark

241

90. TILES OF THE NEW WORLD PANEL, NORTH WALL OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

90. TILES OF THE NEW WORLD PANEL, NORTH WALL OF THE INDIAN HOUSE. THE RELIEF BROCADE TILES ILLUSTRATE SCENES OF NATIVE AMERICAN HISTORY AND CULTURE, AND THE EARLY EUROPEAN EXPLORATION OF THE NEW WORLD. SAME VIEW AS PA-107-21. - Moravian Pottery & Tile Works, Southwest side of State Route 313 (Swamp Road), Northwest of East Court Street, Doylestown, Bucks County, PA

242

21. TILES OF THE NEW WORLD PANEL, NORTH WALL OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

21. TILES OF THE NEW WORLD PANEL, NORTH WALL OF THE INDIAN HOUSE. THE RELIEF BROCADE TILES ILLUSTRATE SCENES OF NATIVE AMERICAN HISTORY AND CULTURE, AND THE EARLY EUROPEAN EXPLORATION OF THE NEW WORLD. - Moravian Pottery & Tile Works, Southwest side of State Route 313 (Swamp Road), Northwest of East Court Street, Doylestown, Bucks County, PA

243

Indecomposable tilings of the integers with exponentially long periods  

E-print Network

of period greater than e c 3 p nk log(nk ) where n k = diam(A k ) = maxfj 2 A k g minfj 2 A k g tends to in tiles A that admit many di#11;erent tilings of small period length and then taking the disjoint unionIndecomposable tilings of the integers with exponentially long periods John P. Steinberger

Steinberger, John

244

Complexity and cohomology for cut and projection tilings  

Microsoft Academic Search

We consider a subclass of tilings, the tilings obtained by cut and projection. Under somewhat standard assumptions, we show that the natural complexity function has polynomial growth. We compute its exponent \\\\alpha in terms of the ranks of certain groups which appear in the construction. We give bounds for \\\\alpha. These computations apply to some well known tilings, such as

Antoine Julien; Batiment Braconnier

2008-01-01

245

DeskAlign: Automaticlly Aligning a Tiled Windows Desktop  

Microsoft Academic Search

Tiled projector arrays are effective at meeting the needs for scalable, cost effective, higher resolution displays. In- creases in PC performance have allowed small tiled dis- plays to be driven from a single PC with multiple graphics cards. In this paper we present a system for automatically aligning the Windows Desktop of a tiled display. This sys- tem consists of

Grant Wallace; Han Chen; Kai Li

246

Robust tile-based texture synthesis using texture element  

Microsoft Academic Search

One significant problem in texture synthesis based on ?-tile is that it is not suitable for the synthesis of structural texture. In this paper, we propose a robust approach that can generate an ?-tile set of high-quality regular texture. First, all possible sets of 4, 8 and 16 ?-tiles that meet certain criteria are obtained, and then a fast search

Gang Xu; Shuang Ma

2010-01-01

247

A Tile Manager for Deploying Scenarios in Virtual Driving Environments  

Microsoft Academic Search

A tile based scenario system that allows an experimenter to 1) change the order and number of tiles; 2) change the parameters of a scenario via an XML file; and 3) provide both standard performance measures as well as those that are unique to a particular scenario has been developed. Each scenario is viewed as a tile and is defined

Piriyakala Suresh; Ronald R. Mourant

248

Two Views of Islam: Ceramic Tile Design and Miniatures.  

ERIC Educational Resources Information Center

Describes an art project focusing on Islamic art that consists of two parts: (1) ceramic tile design; and (2) Islamic miniatures. Provides background information on Islamic art and step-by-step instructions for designing the Islamic tile and miniature. Includes learning objectives and resources on Islamic tile miniatures. (CMK)

Macaulay, Sara Grove

2001-01-01

249

A MODIFICATION OF THE PENROSE APERIODIC TILING VIVIAN OLSIEWSKI HEALEY  

E-print Network

-known aperiodic set contains only two tiles. The first known aperiodic set of tiles was discovered by Hao Wang. For our purposes, we will consider a modification of the Penrose tiling discovered by Robert Ammann units, which may be atoms, molecules, etc., in such a way that the units completely fill R3. Classically

Kahng, Byung-Jay

250

The monitoring and data quality assessment of the ATLAS liquid argon calorimeter  

E-print Network

The ATLAS experiment is designed to study the proton-proton ($pp$) collisions produced at the Large Hadron Collider (LHC) at CERN. Liquid argon (LAr) sampling calorimeters are used for all electromagnetic calorimetry in the pseudo-rapidity region $|\\eta|< 3.2$, as well as for hadronic calorimetry in the range $1.5 < |\\eta| < 4.9$. The electromagnetic calorimeters use lead as passive material and are characterized by an accordion geometry that allows a fast and uniform response without azimuthal gaps. Copper and tungsten were chosen as passive material for the hadronic calorimetry; while a classic parallel-plate geometry was adopted at large polar angles, an innovative design based on cylindrical electrodes with thin liquid argon gaps is employed at low angles, where the particle flux is higher. All detectors are housed in three cryostats maintained at about 88.5~K. The 182,468 cells are read out via front-end boards housed in on-detector crates that also contain monitoring, calibration, trigger and t...

Simard, O; The ATLAS collaboration

2014-01-01

251

The monitoring and data quality assessment of the ATLAS liquid argon calorimeter  

E-print Network

The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Liquid argon (LAr) sampling calorimeters are used for all electromagnetic calorimetry in the pseudo-rapidity region |?|< 3.2, as well as for hadronic calorimetry in the range 1.5<|?|<4.9. The electromagnetic calorimeters use lead as passive material and are characterized by an accordion geometry that allows a fast and uniform response without azimuthal gaps. Copper and tungsten were chosen as passive material for the hadronic calorimetry; while a classic parallel-plate geometry was adopted at large polar angles, an innovative design based on cylindrical electrodes with thin liquid argon gaps is employed for the coverage at low angles, where the particle flux is higher. All detectors are housed in three cryostats maintained at about 88.5K. The approximately 200K cells are read out via front-end boards housed in on-detector crates that also contain monitoring, calibration, trigg...

Simard, O; The ATLAS collaboration

2014-01-01

252

Thermal conductivity studies on ceramic floor tiles  

Microsoft Academic Search

Thermal diffusivity, thermal conductivity and specific heat of several materials used as floor tiles have been measured using the laser flash method. Natural stones, particularly granite, porcelain stoneware and red stoneware materials of low water absorption, are more effective thermal conductors than white stoneware and vinyl, which have thermal conductivities below 1Wm?1K?1. Therefore, last two should not be recommended for

E. García; A. de Pablos; M. A. Bengoechea; L. Guaita; M. I. Osendi; P. Miranzo

2011-01-01

253

Advanced solar tile design and performance  

Microsoft Academic Search

Unlike typical solar arrays whereby each string is composed of solar cells with discrete coverslides and interconnects, a solar tile contains a complete string, or multiple strings, under a single coverslide with coplanar contact solar cells mounted to and interconnected with Kapton®-copper flexible circuitry. Advance fabrication processes include robotic solar cell placement, vapor-phase batch soldering, and laser formed circuit vias.

C. Flora; S. Bauman

2002-01-01

254

TILE at Iowa: Adoption and Adaptation  

ERIC Educational Resources Information Center

This chapter introduces a University of Iowa effort to enhance and support active learning pedagogies in technology-enhanced (TILE) classrooms and three elements that proved essential to the campus-wide adoption of those pedagogies. It then describes the impact of those professional development efforts on the curricula and cultures of three…

Florman, Jean C.

2014-01-01

255

The Tiled Bitmap Forensic Analysis Algorithm  

Microsoft Academic Search

Tampering of a database can be detected through the use of cryptographically-strong hash func- tions. Subsequently-applied forensic analysis algorithms can help determine when, what, and perhaps ultimately who and why. This paper presents a novel forensic analysis algorithm, the Tiled Bitmap Algorithm, which is more efficient than prior forensic analysis algorithms. It introduces the notion of a candidate set (all

Kyriacos E. Pavlou; Richard T. Snodgrass

2010-01-01

256

Comparison testing of a mound calorimeter and a Savannah River Site calorimeter  

SciTech Connect

This paper describes the paired comparison testing of a Savannah River Site (SRS) calorimeter and a Mound calorimeter. Prior to this test, no offsite testing had been performed on an SRS calorimeter. The testing was performed at the Plutonium Facility of Los Alamos National Laboratory (LANL). The SRS calorimeter was designed, fabricated and delivered to LANL. The Mound calorimeter chosen for comparison was similar in well dimensions and located in the same room as the SRS calorimeter. There were three series of tests performed. First, twenty radiometric standard measurements were completed using two different standards. The second series of tests were dedicated to heat distribution measurements and the third series focused on measuring typical process samples.

ReFalo, L.A. [Westinghouse Savannah River Co., Aiken, SC (United States); Foster, L.A. [Los Alamos National Lab., NM (United States)

1995-11-01

257

CMS Calorimeter Trigger Phase I upgrade  

NASA Astrophysics Data System (ADS)

We present a design for the Phase-1 upgrade of the Compact Muon Solenoid (CMS) calorimeter trigger system composed of FPGAs and Multi-GBit/sec links that adhere to the ?TCA crate Telecom standard. The upgrade calorimeter trigger will implement algorithms that create collections of isolated and non-isolated electromagnetic objects, isolated and non-isolated tau objects and jet objects. The algorithms are organized in several steps with progressive data reduction. These include a particle cluster finder that reconstructs overlapping clusters of 2x2 calorimeter towers and applies electron identification, a cluster overlap filter, particle isolation determination, jet reconstruction, particle separation and sorting.

Klabbers, P.; Gorski, T.; Bachtis, M.; Compton, K.; Dasu, S.; Farmahini-Farahani, A.; Fobes, R.; Gregerson, A.; Grothe, M.; Ross, I.; Seemuth, D.; Schulte, M.; Smith, W. H.

2012-01-01

258

The Soudan 2 honeycomb calorimeter  

SciTech Connect

Soudan 2 is an 1100-ton honeycomb tracking calorimeter which is being constructed to search for nucleon decay. The detector consists of finely segmented iron instrumented with long drift tubes, and records three spatial coordinates and dE/dx for every gas crossing. Excellent event reconstruction capability, particle identification and muon sign and direction determination give superior rejection of the neutrino background to nucleon decay in many modes. The first 620 tons of Soudan 2 are now in steady operation, with completion planned for 1992. Detector performance has been studied using cosmic ray tracks and a charged test beam calibration. Results on detector performance and detector response are described in this paper. 2 refs. , 11 figs.

Garcia-Garcia, C.

1990-12-01

259

Tile-based Level of Detail for the Parallel Age  

SciTech Connect

Today's PCs incorporate multiple CPUs and GPUs and are easily arranged in clusters for high-performance, interactive graphics. We present an approach based on hierarchical, screen-space tiles to parallelizing rendering with level of detail. Adapt tiles, render tiles, and machine tiles are associated with CPUs, GPUs, and PCs, respectively, to efficiently parallelize the workload with good resource utilization. Adaptive tile sizes provide load balancing while our level of detail system allows total and independent management of the load on CPUs and GPUs. We demonstrate our approach on parallel configurations consisting of both single PCs and a cluster of PCs.

Niski, K; Cohen, J D

2007-08-15

260

Accelerator Test of an Imaging Calorimeter  

NASA Technical Reports Server (NTRS)

The Imaging Calorimeter for ACCESS (ICA) utilizes a thin sampling calorimeter concept for direct measurements of high-energy cosmic rays. The ICA design uses arrays of small scintillating fibers to measure the energy and trajectory of the produced cascades. A test instrument has been developed to study the performance of this concept at accelerator energies and for comparison with simulations. Two test exposures have been completed using a CERN test beam. Some results from the accelerator tests are presented.

Christl, Mark J.; Adams, James H., Jr.; Binns, R. W.; Derrickson, J. H.; Fountain, W. F.; Howell, L. W.; Gregory, J. C.; Hink, P. L.; Israel, M. H.; Kippen, R. M.; Whitaker, Ann F. (Technical Monitor)

2001-01-01

261

Analog VS Digital Hadron Calorimetry at a Future Electron-Positron Linear Collider  

NASA Astrophysics Data System (ADS)

Precision jet measurements at a future e+e- linear collider may only be possible using so-called Particle Flow Algorithms (PFAs). While there are many possible implementations of P-flow techniques, they all have in common separation of induced calorimeter showers from charged and neutral hadrons (as well as photons) within a jet. Shower reconstruction in the calorimeter becomes more important than energy measurement of hadrons. The calorimeter cells must be highly granular both transverse to the particle trajectory and in longitudinal segmentation. It is probable that as the cell size decreases, it will be harder to get an energy measure from each cell (analog calorimetry). Using only the hit information (digital calorimetry) may be the best way to measure the neutral hadron energy contribution to jets. In this paper, comparisons of analog and digital methods of measuring the contributions of neutral hadrons to jets are made in simulation and in the context of a particular PFA, indicating that the digital method is at least equal to the analog case in jet energy resolution.

Magill, Stephen R.

2005-02-01

262

Preparations for the Large Hadron Collider  

SciTech Connect

The Compact Muon Solenoid (CMS) experiment is one of two general purpose detectors for the Large Hadron Collider (LHC). The LHC will collide protons at center of mass energies of 14 TeV. At these energies we must see evidence of new phenomena beyond the standard model of particle physics. Preparations of both hardware and software are ongoing. The electromagnetic calorimeter for the detector is under construction. The active components are crystals of the scintillator lead tungstate. In the endcaps of the calorimeter the scintillation light is collected by vacuum phototriodes. Results from tests of a small prototype in electron beams at CERN demonstrate that a resolution of 0.48% can be achieved at electron energies of 180 GeV. Studies of the reach of the CMS for detecting rare or forbidden decays are underway. The lepton-flavor violating decay {tau}{yields}{gamma} has been investigated using simple simulations. Our results indicate that it will be very challenging to improve on the limit for this decay, which is currently set by experiments at B factories, at the LHC. However the study of rare or forbidden decays of W and Z bosons is more promising. A preliminary study indicates that we can set much more stringent limits on the radioactive decay W{yields}{pi}{gamma}, which is allowed in the standard model but with a cross-section too small to be observed.

Heath, Helen [University of Bristol (United Kingdom)

2005-10-17

263

Hadron Physics at FAIR  

SciTech Connect

The new FAIR facility in Darmstadt has a broad program in the field of hadron and nuclear physics utilizing ion beams with unprecedented intensity and accuracy. The hadron physics program centers around the the high-energy storage ring HESR for antiprotons and the PANDA experiment that is integrated in it. The physics program includes among others topics like hadron spectroscopy in the charmonium mass region and below, hyperon physics, electromagnetic processes and charm in nuclei.

Wiedner, Ulrich [Institut f. Experimentalphysik I, Ruhr-University Bochum D-44780 Bochum (Germany)

2011-10-24

264

Holographic model of hadronization.  

PubMed

We study hadronization of the final state in a particle-antiparticle annihilation using a holographic gravity dual description of QCD. At the point of hadronization we match the events to a simple (Gaussian) energy distribution in the five dimensional theory. The final state multiplicities are then modeled by calculating the overlap between the Gaussian and a set of functions in the fifth dimension which represent each hadron. We compare our results to those measured in e(+)e(-) collisions. Hadron production numbers over a range of 4 orders of magnitude are reproduced well. PMID:18518189

Evans, Nick; Tedder, Andrew

2008-04-25

265

Monte Carlo simulation of an actual segmented calorimeter: a study of calorimeter performance at high energies  

SciTech Connect

The calculated responses including energy resolution, angular resolution, and spatial energy deposition of a segmented iron and liquid-argon calorimeter to incident pions in the energy range of 10- to 250-GeV are presented. Experimental data for this calorimeter have been obtained in the 10- to 40- GeV energy range and these results compare favorably with the calculated data.

Gabriel, T.A.; Bishop, B.L.; Goodman, M.S.; Sessoms, A.L.; Eisenstein, B.; Wright, S.C.; Kephart, R.D.

1981-01-01

266

Boeing's High Voltage Solar Tile Test Results  

NASA Technical Reports Server (NTRS)

Real concerns of spacecraft charging and experience with solar array augmented electrostatic discharge arcs on spacecraft have minimized the use of high voltages on large solar arrays despite numerous vehicle system mass and efficiency advantages. Boeing's solar tile (patent pending) allows high voltage to be generated at the array without the mass and efficiency losses of electronic conversion. Direct drive electric propulsion and higher power payloads (lower spacecraft weight) will benefit from this design. As future power demand grows, spacecraft designers must use higher voltage to minimize transmission loss and power cable mass for very large area arrays. This paper will describe the design and discuss the successful test of Boeing's 500-Volt Solar Tile in NASA Glenn's Tenney chamber in the Space Plasma Interaction Facility. The work was sponsored by NASA's Space Solar Power Exploratory Research and Technology (SERT) Program and will result in updated high voltage solar array design guidelines being published.

Reed, Brian J.; Harden, David E.; Ferguson, Dale C.; Snyder, David B.

2002-01-01

267

FITS Tile Compression in the NOAO DMS  

NASA Astrophysics Data System (ADS)

The NOAO Data Management system (DMS) captures data from eleven NOAO and partner telescopes and transports these data from three mountaintops to replicate them between three data centers both North and South of the equator. Image files are annotated, remediated, ingested, and persisted through interfaces of the NOAO Science Archive. Wide-field optical and infrared images flow out of the archive, through the NOAO High Performance Pipeline creating several new data products that flow back into the archive. Raw, pipeline-reduced, and survey data products, both proprietary and post-proprietary, are made available through the NOAO Portal using VO standards and services. Each of these several steps requires access to both image data and metadata in the form of image header keywords. Measures of storage efficiency and throughput characterize performance, cost, schedule, and risk in a matrix across all telescopes and all subsystems. Anything that impedes access to data or metadata diminishes throughput, thus slowing schedules, increasing costs, revealing risks, and adversely affecting performance. The familiar gzip compression algorithm is often used to increase data storage efficiency. However, gzip actually reduces throughput due to initial and recurring overhead of compression and later uncompression. For example, if metadata for an image require remediation, the whole image must be compressed, uncompressed, and compressed again. By contrast, the FITS tile convention using the Rice algorithm achieves about 40% better compression than gzip in just one-third the time. Image headers remain readable such that images often need never be uncompressed at all; metadata can be simply edited in place. Further, a library such as CFITSIO can support tile compression as a native image format. The pixel tiling feature means that for applications such as a cutout service, only the tiles overlapping the desired image section need be uncompressed.

Stobie, E.; Seaman, R.; Barg, I.

2009-09-01

268

Foam-on-Tile Damage Model  

NASA Technical Reports Server (NTRS)

An impact model was developed to predict how three specific foam types would damage the Space Shuttle Orbiter insulating tiles. The inputs needed for the model are the foam type, the foam mass, the foam impact velocity, the foam impact incident angle, the type being impacted, and whether the tile is new or aged (has flown at least one mission). The model will determine if the foam impact will cause damage to the tile. If it can cause damage, the model will output the damage cavity dimensions (length, depth, entry angle, exit angle, and sidewall angles). It makes the calculations as soon as the inputs are entered (less than 1 second). The model allows for the rapid calculation of numerous scenarios in a short time. The model was developed from engineering principles coupled with significant impact testing (over 800 foam impact tests). This model is applicable to masses ranging from 0.0002 up to 0.4 pound (0.09 up to 181 g). A prior tool performed a similar function, but was limited to the assessment of a small range of masses and did not have the large test database for verification. In addition, the prior model did not provide outputs of the cavity damage length, entry angle, exit angle, or sidewall angles.

Koharchik, Michael; Murphy, Lindsay; Parker, Paul

2012-01-01

269

Interference Lattice-based Loop Nest Tilings for Stencil Computations  

NASA Technical Reports Server (NTRS)

A common method for improving performance of stencil operations on structured multi-dimensional discretization grids is loop tiling. Tile shapes and sizes are usually determined heuristically, based on the size of the primary data cache. We provide a lower bound on the numbers of cache misses that must be incurred by any tiling, and a close achievable bound using a particular tiling based on the grid interference lattice. The latter tiling is used to derive highly efficient loop orderings. The total number of cache misses of a code is the sum of (necessary) cold misses and misses caused by elements being dropped from the cache between successive loads (replacement misses). Maximizing temporal locality is equivalent to minimizing replacement misses. Temporal locality of loop nests implementing stencil operations is optimized by tilings that avoid data conflicts. We divide the loop nest iteration space into conflict-free tiles, derived from the cache miss equation. The tiling involves the definition of the grid interference lattice an equivalence class of grid points whose images in main memory map to the same location in the cache-and the construction of a special basis for the lattice. Conflicts only occur on the boundaries of the tiles, unless the tiles are too thin. We show that the surface area of the tiles is bounded for grids of any dimensionality, and for caches of any associativity, provided the eccentricity of the fundamental parallelepiped (the tile spanned by the basis) of the lattice is bounded. Eccentricity is determined by two factors, aspect ratio and skewness. The aspect ratio of the parallelepiped can be bounded by appropriate array padding. The skewness can be bounded by the choice of a proper basis. Combining these two strategies ensures that pathologically thin tiles are avoided. They do not, however, minimize replacement misses per se. The reason is that tile visitation order influences the number of data conflicts on the tile boundaries. If two adjacent tiles are visited successively, there will be no replacement misses on the shared boundary. The iteration space may be covered with pencils larger than the size of the cache while avoiding data conflicts if the pencils are traversed by a scanning-face method. Replacement misses are incurred only on the boundaries of the pencils, and the number of misses is minimized by maximizing the volume of the scanning face, not the volume of the tile. We present an algorithm for constructing the most efficient scanning face for a given grid and stencil operator. In two dimensions it is based on a continued fraction algorithm. In three dimensions it follows Voronoi's successive minima algorithm. We show experimental results of using the scanning face, and compare with canonical loop orderings.

VanderWijngaart, Rob F.; Frumkin, Michael

2000-01-01

270

Military Curriculum Materials for Vocational and Technical Education. Builders School, Ceramic Tile Setting 3-9.  

ERIC Educational Resources Information Center

This course, for individualized or group instruction on ceramic tile setting, was developed from military sources for use in vocational education. The course provides students with skills in mortar preparation, surface preparation, tile layout planning, tile setting, tile cutting, and the grouting of tile joints. Both theory and shop assignments…

Ohio State Univ., Columbus. National Center for Research in Vocational Education.

271

Exploring Excited Hadrons  

E-print Network

Progress in extracting the spectrum of excited hadron resonances is reviewed and the key issues and challenges in such computations are outlined. The importance of multi-hadron states as simulations are done with lighter pion masses is discussed, and the need for all-to-all quark propagators is emphasized.

Colin Morningstar

2008-10-24

272

Exploring Excited Hadrons  

E-print Network

Progress in extracting the spectrum of excited hadron resonances is reviewed and the key issues and challenges in such computations are outlined. The importance of multi-hadron states as simulations are done with lighter pion masses is discussed, and the need for all-to-all quark propagators is emphasized.

Morningstar, C

2008-01-01

273

Visual registration for robotic operations on space-shuttle tiles  

NASA Astrophysics Data System (ADS)

Refurbishing the thermal-protection tiles on a space shuttle before each mission is a lengthy and labor-intensive process. A mobile robot is being developed to perform two of the required maintenance operations on the bottom side of the shuttle: (1) injection of a hydrophobic fluid, to prevent tiles from absorbing water, and (2) visual inspection, to detect anomalous tile conditions. Both operations depend on precise positioning of the robot end effector with respect to each tile. We describe our method for precise visual registration. The technique first detects the edges of the tile (whose approximate shape and dimensions are given from CAD data) and then uses correspondence between visual features in the postflight and preflight images to improve the registration accuracy. Results on actual tile images are presented.

Decurtins, Jeff; Cowan, Cregg K.

1992-11-01

274

Kinetic description of hadron-hadron collisions  

E-print Network

A transport model based on the mean free path approach to describe pp collisions is proposed. We assume that hadrons can be treated as bags of partons similarly to the MIT bag model. When the energy density in the collision is higher than a critical value, the bags break and partons are liberated. The partons expand and can make coalescence to form new hadrons. The results obtained compare very well with available data and some prediction for higher energies collisions are discussed. Based on the model we suggest that a QGP could already be formed in the pp collisions at high energies.

Zhi Guang Tan; S. Terranova; A. Bonasera

2007-07-05

275

Glue drops inside hadrons  

E-print Network

We present experimental evidences for the existence of a semi-hard scale in light hadrons. This includes the suppression of gluon radiation that is seen in high mass hadron diffraction; the weak energy dependence of hadronic total cross sections; the small value of the Pomeron trajectory slope measured in photoproduction of J/Psi; the weakness of gluon shadowing in nuclei; shortage of gluons in the proton revealed by an unusual behavior of the proton structure function in the soft limit, and the enhanced intrinsic transverse momentum of quarks and gluons, which considerably exceeds the inverse hadronic size. All these observations suggest that gluons in hadrons are located within spots of a small size relative to the confinement radius.

B. Z. Kopeliovich; B. Povh; Ivan Schmidt

2006-07-31

276

Hadron energy resolution as a function of iron plate thickness at ICAL  

E-print Network

We report on a detailed study of the hadron energy resolution as a function of the thickness of the absorber plates for the proposed Iron Calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO). We compare the hadron resolutions obtained with absorber thicknesses in the range 1.5 -- 8 cm for neutrino interactions in the energy range 2 -- 15 GeV, which is relevant to hadron production in atmospheric neutrino interactions. We find that at lower energies, the thickness dependence of energy resolution is steeper than at higher energies, however there is a constant contribution that dominates at the lower thicknesses discussed in this paper. As a result, the gain in hadron energy resolution with decreasing plate thickness is marginal. We present the results in the form of fits to a function with energy-dependent exponent.

Lakshmi S. Mohan; Anushree Ghosh; Moon Moon Devi; Daljeet Kaur; Sandhya Choubey; Amol Dighe; D. Indumathi; M. V. N. Murthy; Md. Naimuddin

2014-01-13

277

New method to measure the attenuation of hadrons in extensive air showers  

SciTech Connect

Extensive air showers are generated through interactions of high-energy cosmic rays impinging the Earth's atmosphere. A new method is described to infer the attenuation of hadrons in air showers. The numbers of electrons and muons, registered with the scintillator array of the KASCADE experiment, are used to estimate the energy of the shower inducing primary particle. A large hadron calorimeter is used to measure the hadronic energy reaching observation level. The ratio of energy reaching ground level to the energy of the primary particle is used to derive an attenuation length of hadrons in air showers. In the energy range from 10{sup 6} to 3x10{sup 7} GeV the attenuation length obtained increases from 170 to 210 g/cm{sup 2}. The experimental results are compared to predictions of simulations based on contemporary high-energy interaction models.

Apel, W. D.; Badea, F.; Bekk, K.; Bozdog, H.; Daumiller, K.; Doll, P.; Engel, R.; Engler, J.; Finger, M.; Gils, H. J.; Haungs, A.; Heck, D.; Huege, T.; Isar, P. G.; Klages, H. O.; Mathes, H. J.; Mayer, H. J.; Milke, J.; Nehls, S.; Oehlschlaeger, J. [Institut fuer Kernphysik, Forschungszentrum Karlsruhe, 76021 Karlsruhe (Germany)] (and others)

2009-07-15

278

Response of D-Zero Uranium-Liquid Argon Calorimeters at Low Energies and the Effect of Oxygen Contamination on Observed Signals  

NASA Astrophysics Data System (ADS)

Fermi National Accelerator Lab (Fermilab) is the site of the world's highest energy particle accelerator. The D-Zero experiment is one of two at Fermilab studying proton -antiproton collisions at center of mass energies of 1.8 TeV. An analysis of the response of the D-Zero central calorimeter to single electrons and pions has been performed under a variety of operating conditions. The data were acquired from the Load-2 D-Zero Test Beam run, in which beam tests of calorimeter modules were performed between July 1991 and January 1992. The response of modules from the D-Zero central calorimeter was obtained for single electrons and pions in the energy range of 2 through 150 GeV, and implications of these measurements were explored for the energy response to hadronic jets in the calorimeter. The effects of added oxygen, tetramethylgermanium (TMG), and nitrogen for the responses of the calorimeter modules were examined. The additives were found to have similar effects on the signals from electrons and pions. The data with added oxygen were used to calibrate the response of the calorimeter to oxygen concentration in the liquid argon, as measured using the D-Zero liquid argon purity monitoring system. The response of the calorimeter to electrons and pions was also studied for varying charge collection fields. An analysis of the data suggests that the signal (ionization) in typical pion showers contains a greater amount of dense ionization than for the case of electron showers. However, the difference was not found to be sufficiently large enough to allow improvement of compensation in the calorimeter by the addition of photosensitive dopants or by operating at higher charge collection fields.

Hirosky, Robert James

279

NASA TileWorld manual (system version 2.2)  

NASA Technical Reports Server (NTRS)

The commands are documented of the NASA TileWorld simulator, as well as providing information about how to run it and extend it. The simulator, implemented in Common Lisp with Common Windows, encodes a particular range in a spectrum of domains, for controllable research experiments. TileWorld consists of a two dimensional grid of cells, a set of polygonal tiles, and a single agent which can grasp and move tiles. In addition to agent executable actions, there is an external event over which the agent has not control; this event correspond to a 'gust of wind'.

Philips, Andrew B.; Bresina, John L.

1991-01-01

280

Recent Developments And Validations in Geant4 Hadronic Physics  

SciTech Connect

The Geant4 hadronic models cover the entire range of energies required by calorimeters in new and planned experiments. The extension and improvement of the elastic, cascade, parameterized and quark-gluon string models will be discussed. Such improvements include the extension to more particle types, a review and correction of cross sections, and a better treatment of energy and momentum conservation. Concurrent with this development has been a validation program which includes comparisons with double differential cross sections. An ongoing hadronic shower validation will also be discussed which includes the examination of longitudinal shower shapes and the performance of the above models as well as their interaction with electromagnetic processes such as multiple scattering.

Wright, D.H.; Koi, T.; Folger, G.; Ivanchenko, V.; Kossov, M.; Starkov, N.; Heikkinen, A.; Wellisch, H.P.; /SLAC /CERN /Helsinki Inst. of Phys.

2007-02-12

281

Geometric structures in hadronic cores of extensive air showers observed by KASCADE  

SciTech Connect

The geometric distribution of high-energy hadrons {>=}100 GeV in shower cores measured with the KASCADE calorimeter is analyzed. The data are checked for sensitivity to hadronic interaction features and indications of new physics as discussed in the literature. The angular correlation of the most energetic hadrons and, in particular, the fraction of events with hadrons being aligned are quantified by means of the commonly used parameter {lambda}{sub 4}. The analysis shows that the observed {lambda}{sub 4} distribution is compatible with that predicted by simulations and is not linked to an angular correlation from hadronic jet production at high energy. Another parameter, d{sub 4}{sup max}, describing distances between hadrons measured in the detector, is found to be sensitive both to the transverse momenta in secondary hadron production and the primary particle type. Transverse momenta in high-energy hadron interactions differing by a factor two or more from what is assumed in the standard simulations are disfavored by the measured d{sub 4}{sup max} distribution.

Antoni, T.; Glasstetter, R.; Hoerandel, J.R.; Roth, M. [Institut fuer Experimentelle Kernphysik, Universitaet Karlsruhe, 76021 Karlsruhe (Germany); Apel, W.D.; Badea, F.; Bekk, K.; Bozdog, H.; Daumiller, K.; Doll, P.; Engel, R.; Engler, J.; Fessler, F.; Gils, H.J.; Haungs, A.; Heck, D.; Klages, H.O.; Maier, G.; Mathes, H.J.; Mayer, H.J. [Forschungszentrum Karlsruhe, Institut fuer Kernphysik, 76021 Karlsruhe (Germany)] [and others

2005-04-01

282

A Moon-borne electromagnetic calorimeter  

NASA Astrophysics Data System (ADS)

We discuss an electromagnetic sampling calorimeter for the detection of very high energy gamma-rays on the Moon, which is based on the use of scintillating cylinders and plates imbedded in the lunar soil. The use of lunar soil as a calorimeter radiator reduces the weight of the material to be transported to the Moon and minimises environmental impact. Plastic scintillator bars inserted into the regolith about 1.5 m are the active elements of this instrument: at the surface, each bar is terminated by a plastic scintillator plate to veto high energy charge particles. The readout system for the scintillator bars and plates are based on recently developed single photon solid state detectors (Silicon Photomultiplier, SiPM), extremely compact, sturdy and sensitive devices suited for detecting small light pulses in a space experiment. The performance of a regolith-scintillator calorimeter is evaluated and the relevant parameters are optimised using a GEANT4 simulation.

Battiston, Roberto; Brunetti, Maria Teresa; Cervelli, Franco; Fidani, Cristiano; Menichelli, Mauro

2009-10-01

283

The ATLAS Liquid Argon calorimeter: An overview  

NASA Astrophysics Data System (ADS)

The various cryostats with the ATLAS LArg calorimeter are installed in the ATLAS cavern since several years. Following this, an effort to install and commission the front end read-out electronics (infrastructure, crates, boards) has been ongoing and is converging, in time for LHC start. After the mechanical installation of the LArg calorimeter 99.9 % of the read-out channels were working, hence great care was taken to assure the same high level of quality after the installation of the read-out electronics. Following cautious procedures and with continuous testing-campaigns of the electronics at each step of the installation advancement, the result is a fully commissioned calorimeter with its readout and a small number of non-functional channels.

Wilkens, Henric; ATLAS LArg Collaboration

2009-04-01

284

Forward Di-Hadron Correlations and RdA in d+Au Collisions at RHIC  

NASA Astrophysics Data System (ADS)

Measurements using the PHENIX forward detectors in high energy deuteron-gold collisions make it possible to study cold nuclear matter effects in nucleon structure. The high parton densities in nuclei at low-x lead to gluon fusion causing saturation of the gluon distribution and thus suppression of hadron production cross section. This saturation has been described as the formation of the Color Glass Condensate (CGC). A conclusive measurement discriminating between different mechanisms has yet to be carried out. CGC calculations predict significant suppression of conditional yields for rapidity separated hadron pairs with one of the hadrons at forward rapidity. Two new forward electromagnetic calorimeters (Muon Piston Calorimeters, -3.1 < ?< -3.7, 3.1 < ?< 3.9 ) allow the PHENIX experiment to further study forward di-hadron correlations and RdA which have been predicted to show dramatic effects due to gluon saturation. Azimuthal correlations of di- hadron pairs at different pseudorapidities and RdA of 0? and ? will be shown. The forward pseudorapidity correlations are especially interesting because it is expected that they provide a test of gluon saturation down to x 10-3 in the Au nucleus. The analysis presented is based on the high integrated luminosity data sample of d+Au collisions at ?sNN = 200 GeV taken at RHIC in 2008.

Choi, Ihnjea

2011-10-01

285

Precision Crystal Calorimeters in High Energy Physics  

ScienceCinema

Precision crystal calorimeters traditionally play an important role in high energy physics experiments. In the last two decades, it faces a challenge to maintain its precision in a hostile radiation environment. This paper reviews the performance of crystal calorimeters constructed for high energy physics experiments and the progress achieved in understanding crystal?s radiation damage as well as in developing high quality scintillating crystals for particle physics. Potential applications of new generation scintillating crystals of high density and high light yield, such as LSO and LYSO, in particle physics experiments is also discussed.

Ren-Yuan Zhu

2010-01-08

286

Nonuniformities in organic liquid ionization calorimeters  

SciTech Connect

Hermeticity and uniformity in SSC calorimeter designs are compromised by structure and modularity. Some of the consequences of the cryogenic needs of liquid argon calorimetry are relatively well known. If the active medium is an organic liquid (TMP, TMS, etc.), a large number of independent liquid volumes is needed for safety and for rapid liquid exchange to eliminate local contamination. Modular construction ordinarily simplifies fabrication, assembly, handling and preliminary testing at the price of additional walls, other dead regions and many nonuniformities. Here we examine ways of minimizing the impact of some generic nonuniformities on the quality of calorimeter performance. 6 refs., 7 figs.

Wenzel, W.A.

1989-06-01

287

Complex tiling patterns in liquid crystals  

PubMed Central

In this account recent progress in enhancing the complexity of liquid crystal self-assembly is highlighted. The discussed superstructures are formed mainly by polyphilic T-shaped and X-shaped molecules composed of a rod-like core, tethered with glycerol units at both ends and flexible non-polar chain(s) in lateral position, but also related inverted molecular structures are considered. A series of honeycomb phases composed of polygonal cylinders ranging from triangular to hexagonal, followed by giant cylinder honeycombs is observed for ternary T-shaped polyphiles on increasing the size of the lateral chain(s). Increasing the chain size further leads to new modes of lamellar organization followed by three-dimensional and two-dimensional structures incorporating branched and non-branched axial rod-bundles. Grafting incompatible chains to opposite sides of the rod-like core leads to quaternary X-shaped polyphiles. These form liquid crystalline honeycombs where different cells are filled with different material. Projected on an Euclidian plane, all honeycomb phases can be described either by uniformly coloured Archimedean and Laves tiling patterns (T-shaped polyphiles) or as multi-colour tiling patterns (X-shaped polyphiles). It is shown that geometric frustration, combined with the tendency to segregate incompatible chains into different compartments and the need to find a periodic tiling pattern, leads to a significant increase in the complexity of soft self-assembly. Mixing of different chains greatly enhances the number of possible ‘colours’ and in this way, periodic structures comprising up to seven distinct compartments can be generated. Relations to biological self-assembly are discussed shortly. PMID:24098852

Tschierske, C.; Nurnberger, C.; Ebert, H.; Glettner, B.; Prehm, M.; Liu, F.; Zeng, X.-B.; Ungar, G.

2012-01-01

288

Results of prototype studies for a spaghetti calorimeter  

NASA Astrophysics Data System (ADS)

In the framework of the LAA project, prototypes for a new type of calorimeter, intended for the detection of both electromagnetic (e.m.) and hadronic showers, muons and missing energy (e.g. neutrinos) at high-luminosity multi-TeV pp colliders, were tested. The detector consists of scintillating plastic fibres embedded in a lead matrix at a volume ratio 1:4, such as to achieve compensation. The optimization of the construction of the detector modules is described, as well as the performance concerning e.m. shower and muon detection and e/? separation. We used electron, pion and muon beams in the energy range 10-150 GeV for this purpose. For the energy resolution of electrons we found 13%/ trE, with a constant term of 1%. The signal uniformity was better than 3% over the total surface of projective modules. The signal linearity for e.m. shower detection was better than 1%, and the e/? separation was better than 5 × 10 -4 for isolated particles. Channeling effects are negligible, provided that the angle between the incoming particles and the fibre axis is larger than 2°.

Acosta, D.; Buontempo, S.; Calôba, L.; Caria, M.; Desalvo, R.; Ereditato, A.; Ferrari, R.; Fraternali, M.; Fumagalli, G.; Gildemeister, O.; Hartjes, F. G.; Henkes, Th. H.; Henriques, A.; Linssen, L.; Livan, M.; Maio, A.; Mapelli, L.; Meier, K. H.; Ong, B.; Paar, H. P.; Pastore, F.; Pereira, M.; Poggioli, L.; Scheel, C. V.; Seixas, J. M.; Simon, A.; Sivertz, M.; Sonderegger, P.; Souza, M. N.; Thomé, Z. D.; Vercesi, V.; Wigmans, R.

1990-09-01

289

Initial upgrade of the ATLAS Level-1 Calorimeter Trigger  

E-print Network

The Level-1 calorimeter trigger~(L1Calo) of the ATLAS experiment has been operating well since the start of Large Hadron Collider~(LHC) data taking, and played a major role in the Higgs boson discovery. To face the new challenges posed by the upcoming increases of the LHC proton beam energy and luminosity, a series of upgrades is planned for the L1Calo. This paper presents the first L1Calo upgrade program for the initial upgrade phase in 2013-14. The program includes substantial improvements to the analogue and digital signal processing. Two existing digital algorithm processor subsystems will receive substantial hardware and firmware upgrades, allowing topological information to be transmitted and processed. An entirely new subsystem, the L1 topological processor, will receive real-time data from both the upgraded L1Calo and L1 muon trigger to perform trigger algorithms based on entire event topologies. The expected performance improvements are described together with the upgraded hardware and firmware imple...

Ta, DB; The ATLAS collaboration

2014-01-01

290

Hadrons in Nuclei  

E-print Network

Changes of hadronic properties in dense nuclear matter as predicted by theory have usually been investigated by means of relativistic heavy-ion reactions. In this talk I show that observable consequences of such changes can also be seen in more elementary reactions on nuclei. Particular emphasis is put on a discussion of photonuclear reactions; examples are the dilepton production at $\\approx 1$ GeV and the hadron production in nuclei at 10 - 20 GeV photon energies. The observable effects are expected to be as large as in relativistic heavy-ion collisions and can be more directly related to the underlying hadronic changes.

Ulrich Mosel

2003-10-28

291

Hadrons in Nuclei  

E-print Network

Changes of hadronic properties in dense nuclear matter as predicted by theory have usually been investigated by means of relativistic heavy-ion reactions. In this talk I show that observable consequences of such changes can also be seen in more elementary reactions on nuclei. Particular emphasis is put on a discussion of photonuclear reactions; examples are the dilepton production at $\\approx 1$ GeV and the hadron production in nuclei at 10 - 20 GeV virtual photon energies. The observable effects are expected to be as large as in relativistic heavy-ion collisions and can be more directly related to the underlying hadronic changes.

Ulrich Mosel

2003-04-25

292

Vortex states in Archimedean tiling pinning arrays  

NASA Astrophysics Data System (ADS)

We numerically study vortex ordering and pinning in Archimedean tiling substrates composed of square and triangular plaquettes. The two different plaquettes become occupied at different vortex densities, producing commensurate peaks in the magnetization at non-integer matching fields. We find that as the field increases, in some cases the fraction of occupied pins can decrease due to the competition between fillings of the different plaquette types. We also identify a number of different types of vortex orderings as a function of the field at integer and non-integer commensurate fillings.

Ray, D.; Reichhardt, C.; Olson Reichhardt, C. J.

2014-07-01

293

The tilings of Kari and E. Arthur Robinson, Jr.  

E-print Network

. · In a valid tiling, colors of adjacent edges must match. · Essentialy a 2-dimensional SFT, · (any 2-d SFT can Fibonacci SFT. #12;Finite state machine #12;Hao Wang, 1961 · Studied problem of existence of a valid tiling of the plane. · Equivalently: every nonempty 2-dimensional SFT has a periodic orbit. · (Wang did not use

Robinson Jr., E. Arthur (Robbie)

294

Tiled silicon: a packaging alternative to large silicon chips  

Microsoft Academic Search

Recent advances in area array chip bonding combined with the availability of high density substrates facilitate novel approaches to partitioning future systems. We examine one such new paradigm here: tiled silicon, in which system integration is achieved by tiling a set of chips together using area bonding on high density substrates rather than by pursuing single chip integration. We simulate

G. George; J. P. Krusius; R. Granitz

1995-01-01

295

ATOMIC SURFACES, TILINGS AND COINCIDENCE I. IRREDUCIBLE CASE  

E-print Network

ATOMIC SURFACES, TILINGS AND COINCIDENCE I. IRREDUCIBLE CASE SHUNJI ITO AND HUI RAO Abstract of this iterated function system are called the atomic surfaces. In this paper, a new tiling of atomic surfaces of atomic surfaces. We conjecture that every Pisot substitution satisfies the super-coincidence condition. 1

Rao, Hui

296

Large Classroom Experience with an Interactive Tiled Display Mural  

Microsoft Academic Search

This paper presents work on an advanced multimedia lecture hall exploiting large tiled displays and student laptops, the software supporting their combined use, and the initial validation of this environment in enhancing learning and student-instructor interaction. Large resolution tiled displays allow multiple students with laptops or tablet PC's to present their work and collaborate with the instructor and other students

Jeremy Richards; Patrick E. Mantey

2006-01-01

297

Covering Shapes with Tiles: Primary Students' Visualisation and Drawing  

Microsoft Academic Search

Students' early area· concepts were llwestigated by an analysis of responses to a worksheet of items that involved visualising the tiling of given figures. Students in Years 2 and 4 in four schools attempted the items on three occasions and some of the students completed ten classroom spatial activities. Half the students had difficulty visualising the tiling of shapes, but

Kay Owens

1998-01-01

298

Glazed tiles manufactured from incinerated sewage sludge ash and clay.  

PubMed

Sewage sludge incineration is applied extensively in highly populated cities as a final sludge treatment. In this study, incinerated ash was utilized as an additive to clay to manufacture glaze tiles. Four different amounts of ash (0, 15, 30, and 45%) were added, and five glaze concentrations (0.03, 0.06, 0.1, 0.15, and 0.2 g/cm2) were applied on the surface of biscuit tiles to study the effects of ash additive and glaze concentration on properties of fired samples. Sewage sludge was dehydrated and incinerated into ash at 800 degrees C. Subsequently, tile specimens were manufactured and fired at 800 degrees C to make biscuit tiles. Fritted glazes and iron oxide were used as the fundamental glaze and colorant, respectively. Finally, glaze was applied on the surface of biscuit tiles and then fired at 1050 degrees C to sinter them into glazed tile specimens. Tests were performed to analyze properties, including water absorption, firing shrinkage, weight loss on ignition, abrasion resistance, bending resistance, acid-alkali resistance, and aging resistance on specimens of glaze tile. To further understand more about the microstructural behavior of glazed tile specimens, analysis of energy dispersive spectrometer, scanning electron microscopy, and X-ray were carried out in this study. PMID:15796106

Lin, Deng-Fong; Luo, Huan-Lin; Sheen, Yeong-Nain

2005-02-01

299

Low-Density, Aerogel-Filled Thermal-Insulation Tiles  

NASA Technical Reports Server (NTRS)

Aerogel fillings have been investigated in a continuing effort to develop low-density thermal-insulation tiles that, relative to prior such tiles, have greater dimensional stability (especially less shrinkage), equal or lower thermal conductivity, and greater strength and durability. In preparation for laboratory tests of dimensional and thermal stability, prototypes of aerogel-filled versions of recently developed low-density tiles have been fabricated by impregnating such tiles to various depths with aerogel formations ranging in density from 1.5 to 5.6 lb/ft3 (about 53 to 200 kg/cu m). Results available at the time of reporting the information for this article showed that the thermal-insulation properties of the partially or fully aerogel- impregnated tiles were equivalent or superior to those of the corresponding non-impregnated tiles and that the partially impregnated tiles exhibited minimal (<1.5 percent) shrinkage after multiple exposures at a temperature of 2,300 F (1,260 C). Latest developments have shown that tiles containing aerogels at the higher end of the density range are stable after multiple exposures at the said temperature.

Santos, Maryann; Heng, Vann; Barney, Andrea; Oka, Kris; Droege, Michael

2005-01-01

300

Deformable Free Space Tilings for Kinetic Collision Detection  

Microsoft Academic Search

We present kinetic data structures for detecting collisions between a set of polygons that are not only moving continuously but whose shapes can also vary continuously with time. Unlike classical collision detection methods that rely on bounding volume hierarchies, our method is based on deformable tilings of the free space surrounding the polygons. The basic shape of our tiles is

Pankaj Agarwal; Julien Baschy; Leonidas J. Guibasy; John Hershbergerz; Li Zhang

2002-01-01

301

FRACTAL TILES ASSOCIATED WITH SHIFT RADIX SYSTEMS ERIE BERTH  

E-print Network

FRACTAL TILES ASSOCIATED WITH SHIFT RADIX SYSTEMS VAL â?? ERIE BERTH â?? E, ANNE SIEGEL, WOLFGANG to fractal shapes, such as the classical Rauzy fractal and the twin dragon. These fractals turned out a collection of fractal tiles with shift radix systems. We show that for certain classes of parameters r

302

Automatic Temperature Control for an Adiabatic Calorimeter  

Microsoft Academic Search

An automatic temperature control device for an adiabatic oxygen bomb calorimeter has been developed which keeps the temperature of the outer water jacket equal to that of the inner bath. When the temperature of the inner bath is not changing rapidly, heat losses are negligible; however, the error due to lag when the inner bath temperature is rising rapidly is

W. W. Cleland; Richard S. Harding

1957-01-01

303

Monte Carlo Simulation of HERD Calorimeter  

E-print Network

The High Energy cosmic-Radiation Detection (HERD) facility onboard China's Space Station is planned for operation starting around 2020 for about 10 years. It is designed as a next generation space facility focused on indirect dark matter search, precise cosmic ray spectrum and composition measurements up to the knee energy, and high energy gamma-ray monitoring and survey. The calorimeter plays an essential role in the main scientific objectives of HERD. A 3-D cubic calorimeter filled with high granularity crystals as active material is a very promising choice for the calorimeter. HERD is mainly composed of a 3-D calorimeter (CALO) surrounded by silicon trackers (TK) from all five sides except the bottom. CALO is made of 9261 cubes of LYSO crystals, corresponding to about 55 radiation lengths and 3 nuclear interaction lengths, respectively. Here the simulation results of the performance of CALO with GEANT4 and FLUKA are presented: 1) the total absorption CALO and its absorption depth for precise energy measure...

Xu, M; Dong, Y W; Lu, J G; Quan, Z; Wang, L; Wang, Z G; Wu, B B; Zhang, S N

2014-01-01

304

The mini-calorimeter for AGILE satellite  

NASA Astrophysics Data System (ADS)

The AGILE (Astro-rivelatore Gamma a Immagini LEggero) satellite is the first ASI (Italian Space Agency) mission of the Small Scientific Satellite program. The AGILE scientific payload consists of a silicon-tungsten tracker, a Cesium Iodide mini-calorimeter, an anticoincidence system made of plastic scintillators, fast read-out electronics and processing units. The instrument is designed to operate in the energy range 30 MeV - 50 GeV and will achieve an optimal angular resolution (5' to 20') for intense sources and a large field of view (better then 2 sr). The mini-calorimeter detector is made of 2 orthogonal planes each one constituted of 16 bars of CsI(TI) having a total area of 1600 cm2. The mini-calorimeter will contribute to the determination of the energy of the interacting gamma-rays and will allow the detection of Gamma Ray Burst and other impulsive events in the energy range 0.25-100 MeV. The design of the mini-calorimeter and the results of the preliminary tests will be presented.

Di Cocco, Guido; Labanti, Claudio; Auricchio, Natalia; Galli, Marcello; Mauri, Alessandro; Rossi, Elio; Schiavone, Filomena; Traci, Alessandro

2001-09-01

305

The ATLAS liquid-argon electromagnetic calorimeter  

NASA Astrophysics Data System (ADS)

Using test-beam results from the RD3 collaboration, the ATLAS liquid-argon electromagnetic calorimeter has been optimized for the search for the decay of the Higgs boson in two photons. Other physics topics add fewer constraints. We present the choices made for the following items: lead thickness, sampling depth, implementation of the preshower and high-granularity sections.

Zolnierowski, Yves; Atlas Collaboration

1996-12-01

306

A primer on substitution tilings of the Euclidean plane  

E-print Network

This paper is intended to provide an introduction to the theory of substitution tilings. For our purposes, tiling substitution rules are divided into two broad classes: geometric and combinatorial. Geometric substitution tilings include self-similar tilings such as the well-known Penrose tilings; for this class there is a substantial body of research in the literature. Combinatorial substitutions are just beginning to be examined, and some of what we present here is new. We give numerous examples, mention selected major results, discuss connections between the two classes of substitutions, include current research perspectives and questions, and provide an extensive bibliography. Although the author attempts to fairly represent the as a whole, the paper is not an exhaustive survey, and she apologizes for any important omissions.

Natalie Priebe Frank

2007-05-08

307

A primer on substitution tilings of the Euclidean plane  

E-print Network

This paper is intended to provide an introduction to the theory of substitution tilings. For our purposes, tiling substitution rules are divided into two broad classes: geometric and combinatorial. Geometric substitution tilings include self-similar tilings such as the well-known Penrose tilings; for this class there is a substantial body of research in the literature. Combinatorial substitutions are just beginning to be examined, and some of what we present here is new. We give numerous examples, mention selected major results, discuss connections between the two classes of substitutions, include current research perspectives and questions, and provide an extensive bibliography. Although the author attempts to fairly represent the as a whole, the paper is not an exhaustive survey, and she apologizes for any important omissions.

Frank, Natalie Priebe

2007-01-01

308

Tiling for Performance Tuning on Different Models of GPUs  

E-print Network

The strategy of using CUDA-compatible GPUs as a parallel computation solution to improve the performance of programs has been more and more widely approved during the last two years since the CUDA platform was released. Its benefit extends from the graphic domain to many other computationally intensive domains. Tiling, as the most general and important technique, is widely used for optimization in CUDA programs. New models of GPUs with better compute capabilities have, however, been released, new versions of CUDA SDKs were also released. These updated compute capabilities must to be considered when optimizing using the tiling technique. In this paper, we implement image interpolation algorithms as a test case to discuss how different tiling strategies affect the program's performance. We especially focus on how the different models of GPUs affect the tiling's effectiveness by executing the same program on two different models of GPUs equipped testing platforms. The results demonstrate that an optimized tiling...

Xu, Chang; Jenkins, Samantha

2010-01-01

309

Vol-a-Tile -a Tool for Interactive Exploration of Large Volumetric Data on Scalable Tiled Displays  

E-print Network

across a twenty square kilo- meter area off the coast of Mexico along the East Pacific Ridge. The data is inadequate and high resolution tiled displays become necessary. Vol-a-Tile [2] is an application designed array of LCD panels, driven by a cluster of PCs, with high-end graphics cards, large disk space, dual

Johnson, Andrew

310

Hadron energy reconstruction for the ATLAS calorimetry in the framework of the non-parametrical method ATLAS  

NASA Astrophysics Data System (ADS)

This paper discusses hadron energy reconstruction for the ATLAS barrel prototype combined calorimeter (consisting of a lead-liquid argon electromagnetic part and an iron-scintillator hadronic part) in the framework of the non-parametrical method. The non-parametrical method utilizes only the known e/ h ratios and the electron calibration constants and does not require the determination of any parameters by a minimization technique. Thus, this technique lends itself to an easy use in a first level trigger. The reconstructed mean values of the hadron energies are within ±1% of the true values and the fractional energy resolution is [(58±3)%/ E+(2.5±0.3)%]?(1.7±0.2)/E . The value of the e/ h ratio obtained for the electromagnetic compartment of the combined calorimeter is 1.74±0.04 and agrees with the prediction that e/ h>1.66 for this electromagnetic calorimeter. Results of a study of the longitudinal hadronic shower development are also presented. The data have been taken in the H8 beam line of the CERN SPS using pions of energies from 10 to 300 GeV.

Akhmadaliev, S.; Amaral, P.; Ambrosini, G.; Amorim, A.; Anderson, K.; Andrieux, M. L.; Aubert, B.; Augé, E.; Badaud, F.; Baisin, L.; Barreiro, F.; Battistoni, G.; Bazan, A.; Bazizi, K.; Belymam, A.; Benchekroun, D.; Berglund, S.; Berset, J. C.; Blanchot, G.; Bogush, A.; Bohm, C.; Boldea, V.; Bonivento, W.; Bosman, M.; Bouhemaid, N.; Breton, D.; Brette, P.; Bromberg, C.; Budagov, J.; Burdin, S.; Caloba, L.; Camarena, F.; Camin, D. V.; Canton, B.; Caprini, M.; Carvalho, J.; Casado, P.; Castillo, M. V.; Cavalli, D.; Cavalli-Sforza, M.; Cavasinni, V.; Chadelas, R.; Chalifour, M.; Chekhtman, L.; Chevalley, J. L.; Chirikov-Zorin, I.; Chlachidze, G.; Citterio, M.; Cleland, W. E.; Clement, C.; Cobal, M.; Cogswell, F.; Colas, J.; Collot, J.; Cologna, S.; Constantinescu, S.; Costa, G.; Costanzo, D.; Crouau, M.; Daudon, F.; David, J.; David, M.; Davidek, T.; Dawson, J.; De, K.; de la Taille, C.; Del Peso, J.; Del Prete, T.; de Saintignon, P.; Di Girolamo, B.; Dinkespiller, B.; Dita, S.; Dodd, J.; Dolejsi, J.; Dolezal, Z.; Downing, R.; Dugne, J.-J.; Dzahini, D.; Efthymiopoulos, I.; Errede, D.; Errede, S.; Evans, H.; Eynard, G.; Fassi, F.; Fassnacht, P.; Ferrari, A.; Ferrari, A.; Ferrer, A.; Flaminio, V.; Fournier, D.; Fumagalli, G.; Gallas, E.; Gaspar, M.; Giakoumopoulou, V.; Gianotti, F.; Gildemeister, O.; Giokaris, N.; Glagolev, V.; Glebov, V.; Gomes, A.; Gonzalez, V.; Gonzalez De La Hoz, S.; Grabsky, V.; Grauges, E.; Grenier, Ph.; Hakopian, H.; Haney, M.; Hebrard, C.; Henriques, A.; Hervas, L.; Higon, E.; Holmgren, S.; Hostachy, J. Y.; Hoummada, A.; Huston, J.; Imbault, D.; Ivanyushenkov, Yu.; Jezequel, S.; Johansson, E.; Jon-And, K.; Jones, R.; Juste, A.; Kakurin, S.; Karyukhin, A.; Khokhlov, Yu.; Khubua, J.; Klyukhin, V.; Kolachev, G.; Kopikov, S.; Kostrikov, M.; Kozlov, V.; Krivkova, P.; Kukhtin, V.; Kulagin, M.; Kulchitsky, Y.; Kuzmin, M.; Labarga, L.; Laborie, G.; Lacour, D.; Laforge, B.; Lami, S.; Lapin, V.; Le Dortz, O.; Lefebvre, M.; Le Flour, T.; Leitner, R.; Leltchouk, M.; Li, J.; Liablin, M.; Linossier, O.; Lissauer, D.; Lobkowicz, F.; Lokajicek, M.; Lomakin, Yu.; Amengual, J. M. Lopez; Lund-Jensen, B.; Maio, A.; Makowiecki, D.; Malyukov, S.; Mandelli, L.; Mansoulié, B.; Mapelli, L.; Marin, C. P.; Marrocchesi, P.; Marroquim, F.; Martin, Ph.; Maslennikov, A.; Massol, N.; Mataix, L.; Mazzanti, M.; Mazzoni, E.; Merritt, F.; Michel, B.; Miller, R.; Minashvili, I.; Miralles, L.; Mnatsakanian, E.; Monnier, E.; Montarou, G.; Mornacchi, G.; Moynot, M.; Muanza, G. S.; Nayman, P.; Nemecek, S.; Nessi, M.; Nicoleau, S.; Niculescu, M.; Noppe, J.-M.; Onofre, A.; Pallin, D.; Pantea, D.; Paoletti, R.; Park, I. C.; Parrour, G.; Parsons, J.; Pereira, A.; Perini, L.; Perlas, J. A.; Perrodo, P.; Pilcher, J.; Pinhao, J.; Plothow-Besch, H.; Poggioli, L.; Poirot, S.; Price, L.; Protopopov, Y.; Proudfoot, J.; Puzo, P.; Radeka, V.; Rahm, D.; Reinmuth, G.; Renzoni, G.; Rescia, S.; Resconi, S.; Richards, R.; Richer, J.-P.; Roda, C.; Rodier, S.; Roldan, J.; Romance, J. B.; Romanov, V.; Romero, P.; Rossel, F.; Russakovich, N.; Sala, P.; Sanchis, E.; Sanders, H.; Santoni, C.; Santos, J.; Sauvage, D.; Sauvage, G.; Sawyer, L.; Says, L.-P.; Schaffer, A.-C.; Schwemling, P.; Schwindling, J.; Seguin-Moreau, N.; Seidl, W.; Seixas, J. M.; Sellden, B.; Seman, M.; Semenov, A.; Serin, L.; Shaldaev, E.; Shochet, M.; Sidorov, V.; Silva, J.; Simaitis, V.; Simion, S.; Sissakian, A.; Snopkov, R.; Soderqvist, J.; Solodkov, A.; Soloviev, A.; Soloviev, I.; Sonderegger, P.; Soustruznik, K.; Spano, F.; Spiwoks, R.; Stanek, R.; Starchenko, E.; Stavina, P.; Stephens, R.; Suk, M.; Surkov, A.; Sykora, I.; Takai, H.; Tang, F.; Tardell, S.; Tartarelli, F.; Tas, P.; Teiger, J.; Thaler, J.; Thion, J.; Tikhonov, Y.; Tisserant, S.; Tokar, S.; Topilin, N.; Trka, Z.; Turcotte, M.; Valkar, S.; Varanda, M. J.; Vartapetian, A.; Vazeille, F.; Vichou, I.; Vinogradov, V.; Vorozhtsov, S.; Vuillemin, V.; White, A.; Wielers, M.; Wingerter-Seez, I.; Wolters, H.; Yamdagni, N.; Yosef, C.; Zaitsev, A.; Zitoun, R.; Zolnierowski, Y. P.

2002-03-01

311

Hadronization of partons  

SciTech Connect

The description of inclusive production of single unpolarized light hadrons using fragmentation functions in the framework of the factorization theorem is reviewed. The factorization of observables into perturbatively calculable quantities and these universal fragmentation functions are summarized and some improvements beyond the standard fixed order approach are discussed. The extraction of fragmentation functions for light charged ({pi}{sup {+-}}, K{sup {+-}}, and p/p) and neutral (K{sub S}{sup 0} and {Lambda}/{Lambda}) hadrons using these theoretical tools is discussed through global fits to experimental data from reactions at various colliders, in particular from accurate e{sup +}e{sup -} reactions at the Large Electron-Position Collider (LEP), and the subsequent successful predictions of other experimental data, such as data gathered at Hadron Electron Ring Accelerator (HERA), the Tevatron, and the Relativistic Heavy Ion Collider (RHIC), from these fitted fragmentation functions as allowed by factorization universality. These global fits also impose competitive constraints on {alpha}{sub s}(M{sub Z}). Emphasis is placed on the need for accurate data from pp(p) and ep reactions in which the hadron species is identified in order to constrain the separate fragmentation functions of the gluon and each quark flavor for each hadron species.

Albino, S. [II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)

2010-07-15

312

Coal fly ash utilization: low temperature sintering of wall tiles.  

PubMed

We present here a study of the sintering of fly ash and its mixture with low alkali pyrophyllite in the presence of sodium hexa meta phosphate (SHMP), a complex activator of sintering, for the purpose of wall tile manufacturing. The sintering of fly ash with SHMP in the temperature range 925-1050 degrees C produces tiles with low impact strength; however, the incremental addition of low alkali pyrophyllite improves impact strength. The impact strength of composites with >or=40% (w/w) pyrophyllite in the fly ash-pyrophyllite mix satisfies the acceptable limit (19.6 J/m) set by the Indian Standards Institute for wall tiles. Increasing the pyrophyllite content results in an increase in the apparent density of tiles, while shrinkage and water absorption decrease. The strength of fly ash tiles is attributed to the formation of a silicophosphate phase; in pyrophyllite rich tiles, it is attributed to the formation of a tridymite-structured T-AlPO(4) phase. Scanning electron micrographs show that the reinforcing rod shaped T-AlPO(4) crystals become more prominent as the pyrophyllite content increases in the sintered tiles. PMID:17950591

Chandra, Navin; Sharma, Priya; Pashkov, G L; Voskresenskaya, E N; Amritphale, S S; Baghel, Narendra S

2008-01-01

313

Are tiled display walls needed for astronomy?  

E-print Network

Clustering commodity displays into a Tiled Display Wall (TDW) provides a cost-effective way to create an extremely high resolution display, capable of approaching the image sizes now gen- erated by modern astronomical instruments. Astronomers face the challenge of inspecting single large images, many similar images simultaneously, and heterogeneous but related content. Many research institutions have constructed TDWs on the basis that they will improve the scientific outcomes of astronomical imagery. We test this concept by presenting sample images to astronomers and non- astronomers using a standard desktop display (SDD) and a TDW. These samples include standard English words, wide field galaxy surveys and nebulae mosaics from the Hubble telescope. These experiments show that TDWs provide a better environment for searching for small targets in large images than SDDs. It also shows that astronomers tend to be better at searching images for targets than non-astronomers, both groups are generally better when em...

Meade, Bernard F; Manos, Steven; Sinnott, Richard O

2014-01-01

314

Floor tile and mastic removal project report  

SciTech Connect

A test program was developed and coordinated with State and Federal Regulators and carried out at Fort Sill, Oklahoma. This program was carefully designed to create the worst conditions in order to evaluate whether asbestos fibers are released when asbestos containing floor tile and mastic are removed. There were over 1,000 samples taken and analyzed during the execution of the program. The conclusions reached were based upon analysis of the critical samples using the Transmission Electron Microscope (TEM) technology. Additionally, the TEM procedures were used to evaluate personnel samples to determine whether those fibers found were asbestos or other materials. Most of the (TEM) samples were analyzed by the US Environmental Protection Agency (EPA) Risk Reduction Engineering Laboratory in Cincinnati, Ohio.

Not Available

1992-11-01

315

X-Ray Calorimeter Arrays for Astrophysics  

NASA Technical Reports Server (NTRS)

High-resolution x-ray spectroscopy is a powerful tool for studying the evolving universe. The grating spectrometers on the XMM and Chandra satellites started a new era in x-ray astronomy, but there remains a need for instrumentation that can provide higher spectral resolution with high throughput in the Fe-K band (around 6 keV) and can enable imaging spectroscopy of extended sources, such as supernova remnants and galaxy clusters. The instrumentation needed is a broad-band imaging spectrometer - basically an x-ray camera that can distinguish tens of thousands of x-ray colors. The potential benefits to astrophysics of using a low-temperature calorimeter to determine the energy of an incident x-ray photon via measurement of a small change in temperature was first articulated by S. H. Moseley over two decades ago. In the time since, technological progress has been steady, though full realization in an orbiting x-ray telescope is still awaited. A low-temperature calorimeter can be characterized by the type of thermometer it uses, and three types presently dominate the field. The first two types are temperature-sensitive resistors - semiconductors in the metal-insulator transition and superconductors operated in the superconducting-normal transition. The third type uses a paramagnetic thermometer. These types can be considered the three generations of x-ray calorimeters; by now each has demonstrated a resolving power of 2000 at 6 keV, but only a semiconductor calorimeter system has been developed to spaceflight readiness. The Soft X-ray Spectrometer on Astro-H, expected to launch in 2013, will use an array of silicon thermistors with I-IgTe x-ray absorbers that will operate at 50 mK. Both the semiconductor and superconductor calorimeters have been implemented in small arrays, kilo-pixel arrays of the superconducting calorimeters are just now being produced, and it is anticipated that much larger arrays will require the non-dissipative advantage of magnetic thermometers.

Kilbourne, Caroline A.

2009-01-01

316

Motivations and ideas behind hadron--hadron event shapes  

Microsoft Academic Search

We summarize the main motivations to study event shapes at hadron colliders. In addition we present classes of event shapes and show their complementary sensitivities to perturbative and non-perturbative effects, namely jet hadronization and underlying event.

G. Zanderighi

2006-01-01

317

Motivations and ideas behind hadron--hadron event shapes  

E-print Network

We summarize the main motivations to study event shapes at hadron colliders. In addition we present classes of event shapes and show their complementary sensitivities to perturbative and non-perturbative effects, namely jet hadronization and underlying event.

G. Zanderighi

2006-05-30

318

Dilepton production from polarized hadron hadron collisions  

SciTech Connect

In this paper we present a comprehensive formalism for dilepton production from the collision of two polarized spin-(1/2) hadrons by identifying the general angular distribution of the cross section in combination with a complete set of structure functions. The various structure functions are computed in the parton model approximation where we mainly consider the case when the transverse momentum of the dilepton pair is much smaller than its invariant mass. In this kinematical region dilepton production can be described in terms of transverse momentum dependent parton distributions.

Arnold, S. [Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, 44780 Bochum (Germany); Metz, A. [Department of Physics, Temple University, Philadelphia, Pennsylvania 19122-6082 (United States); Schlegel, M. [Theory Center, Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States)

2009-02-01

319

Dilepton production from polarized hadron hadron collisions  

SciTech Connect

In this paper we present a comprehensive formalism for dilepton production from the collision of two polarized spin-1/2 hadrons by identifying the general angular distribution of the cross section in combination with a complete set of structure functions. The various structure functions are computed in the parton model approximation where we mainly consider the case when the transverse momentum of the dilepton pair is much smaller than its invariant mass. In this kinematical region dilepton production can be described in terms of transverse momentum dependent parton distributions.

Arnold, S.; Metz, Andreas; Schlegel, Marc

2009-02-01

320

A radiation-cooled armor tile design for the first wall of ITER  

Microsoft Academic Search

A tile design that uses radiation rather than conduction to transfer heat to the water-cooled first wall of the International Thermonuclear Experimental Reactor (ITER) is presented. The central, thermally insulated tile attachment minimizes local thermal stresses in the first wall and facilitates remote maintenance. The tile module consists of: a graphite tile; layers of anisotropic pyrolytic carbon used as a

R. Gallix; C. Baxi; E. Reis; K. Schultz

1989-01-01

321

Introduction/Background Tiling to soccer ball Group theory Further questions Higher Genus Soccer Balls  

E-print Network

Introduction/Background Tiling to soccer ball Group theory Further questions Higher Genus Soccer;Introduction/Background Tiling to soccer ball Group theory Further questions Outline 1 Introduction/Background Credits Why soccer balls? Kaleidoscopic tilings 2 Tiling to soccer ball Cayley Graph Construction

Broughton, S. Allen

322

Efficient 3-SAT algorithms in the tile assembly model Published online: 26 January 2012  

E-print Network

Wang tiles (Wang 1961). Wang tile systems with a seed can simulate Turing machines (Wang 1962). Even without seeds, Wang tiles are still Turing universal (Berger 1966; Robinson 1971). Adleman has identified). Lagoudakis et al. (Lagoudakis and La- Bean 1999) presented a tile system that solves 3-SAT, though their best

Brun, Yuriy

323

TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.  

SciTech Connect

A remarkable result has emerged from the first several years of data taking at RHIC--the high temperature and density phase of QCD matter created in heavy ion collisions at RHIC is best described as a near perfect fluid--the strongly interacting Quark-Gluon-Plasma (sQGP). This state is characterized by a small viscosity to entropy ratio, and a high density of color charges which induces huge energy losses of partons transversing the medium. The task for the future is to understand the characteristics of the sQGP, and perhaps more importantly--to gain some insight into how and why such a medium is created. The PHENIX detector has been one of the primary experimental tools at RHIC; in particular the electromagnetic calorimeter has been a critical component of many of the measurements leading to this discovery. The coverage of the present PHENIX electromagnetic calorimeter is rather limited, covering half the azimuth and -0.35< {eta} <0.35 Further progress requires larger coverage of electromagnetic calorimetry, both to increase the rate for low cross section phenomena, and to cover a broader range of pseudorapidity to study the rapidity dependence of the medium. A pair of Nosecone Calorimeters (NCC) has been designed covering both positive and negative rapidity regions 1< |{eta}| <3 of the PHENIX detector. The NCC will make it possible to perform tomographic studies of the jet energy dependence of energy loss and medium response, by using direct photons as trigger particles over a large rapidity range. The technique of correlating trigger hadrons with low momentum hadrons has been powerfully exploited at RHIC to study the evolution of back to back jets [1, 2] and hence the response of the medium. The NCC will make it possible to do such studies using direct photons as the trigger particles. The direct photon in such ''photon-jet'' events tags the transverse momentum of outgoing parton which then fragments into lower energy particles. Together with the Forward Silicon Vertex detector (FVTX), the NCC will make PHENIX a large acceptance spectrometer, capable of detecting photons, electrons, muons, and hadrons. Our prime motivation is to provide precision measurements of direct photons, {pi}{sup 0}s and dielectrons in A+A, p(d)+A, and polarized p+p collisions. The upgrade will provide access to physics observables that are not currently accessible to PHENIX or that are now available only indirectly with very limited accuracy.

PHENIX EXPERIMENT; OBRIEN,E.; BOOSE, S.; CHIU, M.; JOHNSON, B.M.; KISTENEV, E.P.; LYNCH, D.; NOUICER, R.; PAK, R.; PISANI, R.; STOLL, S.P.; SUKHANOV, A.; WOODY, C.L.; LI, Z.; RADEKA, V.; RESCIA, S.; (PHENIX EXPERIMENT COLLABORATORS)

2007-08-01

324

On Some fundamental aspects of Polyominoes on Random Voronoi Tilings  

E-print Network

Consider a Voronoi tiling of the Euclidean space based on a realization of a inhomogeneous Poisson random set. A Voronoi polyomino is a finite and connected union of Voronoi tiles. In this paper we provide tail bounds for the number of boxes that are intersected by a Voronoi polyomino, and vice-versa. These results will be crucial to analyze self-avoiding paths, greedy polyominoes and first-passage percolation models on Voronoi tilings and on the dual graph, named the Delaunay triangulation.

Leandro P. R. Pimentel

2010-09-20

325

Affine reflection groups for tiling applications: Knot theory and DNA  

NASA Astrophysics Data System (ADS)

We present in this paper some non-conventional applications of affine Weyl groups Waff of rank 2, the symmetry group of the tiling/lattice. We first develop and present the tools for applications requiring tilings of a real Euclidean plane {R}^2. We then elucidate the equivalence of these tilings with 2D projections of knots. The resulting mathematical structure provides a framework within which is encompassed recent work utilizing knot theory for modeling the structure and function of genetic molecules, specifically the action of particular enzymes in altering the topology of DNA in site-specific recombination.

Bodner, M.; Patera, J.; Peterson, M.

2012-01-01

326

Hypervelocity impact testing of Shuttle Orbiter thermal protection system tiles  

NASA Technical Reports Server (NTRS)

Results are presented from a series of 22 hypervelocity impact tests carried out on the thermal protection system (TPS) for the Shuttle Orbiter. Both coated and uncoated low-density (0.14 g/cu cm) LI-900 and high-density (0.35 g/cu cm) LI-2200 tiles were tested. The results are used to develop the penetration and damage correlations which can be used in meteoroid and debris hazard analyses for spacecraft with a ceramic tile TPS. It is shown that tile coatings act as a 'bumper' to fragment the impacting projectile, with thicker coating providing increased protection.

Christiansen, Eric L.; Ortega, Javier

1990-01-01

327

Hadron production in relativistic nuclear collisions: thermal hadron source or hadronizing quark-gluon plasma?  

E-print Network

Measured hadron yields from relativistic nuclear collisions can be equally well understood in two physically distinct models, namely a static thermal hadronic source vs.~a time-dependent, nonequilibrium hadronization off a quark-gluon plasma droplet. Due to the time-dependent particle evaporation off the hadronic surface in the latter approach the hadron ratios change (by factors of $\\approx 200 MeV$. If the present model is fit to the extrapolated hadron yields, metastable hypermatter can only be produced with a probability $p< 10^{-8}$ for $A \\ge 4$.

C. Spieles; H. Stoecker; C. Greiner

1997-04-04

328

Elastic cross sections for high energy hadron-hadron scattering  

E-print Network

This report discusses some results on differential cross sections for high energy and small momentum transfer elastic hadron-hadron scattering in QCD, using a functional integral approach. In particulary a matrix cumulant expansion for the vacuum expectation values of lightlike Wegner-Wilson loops, which governs the hadronic amplitudes, is presented. The cumulants are evaluated using the model of the stochastic vacuum.

E. R. Berger

1998-11-11

329

Level-2 Calorimeter Trigger Upgrade at CDF  

SciTech Connect

The CDF Run II Level-2 calorimeter trigger is implemented in hardware and is based on an algorithm used in Run I. This system insured good performance at low luminosity obtained during the Tevatron Run II. However, as the Tevatron instantaneous luminosity increases, the limitations of the current system due to the algorithm start to become clear. In this paper, we will present an upgrade of the Level-2 calorimeter trigger system at CDF. The upgrade is based on the Pulsar board, a general purpose VME board developed at CDF and used for upgrading both the Level-2 tracking and the Level-2 global decision crate. This paper will describe the design, hardware and software implementation, as well as the advantages of this approach over the existing system.

Flanagan, G.U.; /Purdue U.

2007-04-01

330

LYSO crystal calorimeter readout with silicon photomultipliers  

NASA Astrophysics Data System (ADS)

Large area Silicon PhotoMultipliers (SiPMs) are the new frontier of the development of readout systems for scintillating detectors. A SiPM consists of a matrix of parallel-connected silicon micropixels operating in limited Geiger-Muller avalanche mode, and thus working as independent photon counters with a very high gain (~106). This contribution presents the performance in terms of linearity and energy resolution of an electromagnetic homogeneous calorimeter composed of 9~18X0 LYSO crystals. The crystals were readout by 36 4×4 mm2 SiPMs (4 for each crystal) produced by FBK-irst. This calorimeter was tested at the Beam Test Facility at the INFN laboratories in Frascati with a single- and multi-particle electron beam in the 100-500 MeV energy range.

Berra, A.; Bonvicini, V.; Cecchi, C.; Germani, S.; Guffanti, D.; Lietti, D.; Lubrano, P.; Manoni, E.; Prest, M.; Rossi, A.; Vallazza, E.

2014-11-01

331

Calorimeter, Coffee Cup (ChemPages Lab)  

NSDL National Science Digital Library

Calorimeter, Coffee Cup: this is a resource in the collection "ChemPages Laboratory Resources". A coffee cup calorimeter is a useful, simple device that can be used to measure the temperature change that accompanies a reaction. A Styrofoam cup is used because it is a good insulator. The cup will absorb (or supply) negligible amounts of heat during most General Chemistry experiments. Thus, any change in temperature is assumed to be due only to the reaction, and the heat transferred in the reaction may be calculated. The ChemPages Laboratory Resources are a set of web pages that include text, images, video, and self check questions. The topics included are those that are commonly encountered in the first-year chemistry laboratory. They have been put together for use as both a pre-laboratory preparation tool and an in-laboratory reference source.

332

High intensity hadron accelerators  

SciTech Connect

This rapporteur report consists mainly of two parts. Part I is an abridged review of the status of all High Intensity Hadron Accelerator projects in the world in semi-tabulated form for quick reference and comparison. Part II is a brief discussion of the salient features of the different technologies involved. The discussion is based mainly on my personal experiences and opinions, tempered, I hope, by the discussions I participated in in the various parallel sessions of the workshop. In addition, appended at the end is my evaluation and expression of the merits of high intensity hadron accelerators as research facilities for nuclear and particle physics.

Teng, L.C.

1989-05-01

333

Thermochemistry : BombCalorimeter (4 Variations)  

NSDL National Science Digital Library

Stearic acid (CH 3 (CH 2 ) 16 CO 2 H) is a fatty acid, the part of fat that stores most of the energy. 1.00 g of stearic acid was burned in a bomb calorimeter. The bomb had a heat capacity of 652 J/ o C and a 500. g water reservoir. If the temperature rose from 25.0 to 39.3 o C, how much heat was released when the stearic acid was burned?

334

Monte Carlo simulation of HERD calorimeter  

NASA Astrophysics Data System (ADS)

The High Energy cosmic-Radiation Detection (HERD) facility onboard China's Space Station is planned for operation starting around 2020 for about 10 years. It is designed as a next generation space facility focused on indirect dark matter search, precise cosmic ray spectrum and composition measurements up to the knee energy, and high energy gamma-ray monitoring and survey. The calorimeter plays an essential role in the main scientific objectives of HERD. A 3-D cubic calorimeter filled with high granularity crystals as active material is a very promising choice for the calorimeter. HERD is mainly composed of a 3-D calorimeter (CALO) surrounded by silicon trackers (TK) from all five sides except the bottom. CALO is made of 9261 cubes of LYSO crystals, corresponding to about 55 radiation lengths and 3 nuclear interaction lengths, respectively. Here the simulation results of the performance of CALO with GEANT4 and FLUKA are presented: 1) the total absorption CALO and its absorption depth for precise energy measurements (energy resolution: 1% for electrons and gammarays beyond 100 GeV, 20% for protons from 100 GeV to 1 PeV); 2) its granularity for particle identification (electron/proton separation power better than 10-5); 3) the homogenous geometry for detecting particles arriving from every unblocked direction for large effective geometrical factor (<3 m2sr for electron and diffuse gammarays, >2 m2sr for cosmic ray nuclei); 4) expected observational results such as gamma-ray line spectrum from dark matter annihilation and spectrum measurement of various cosmic ray chemical components.

Xu, M.; Chen, G. M.; Dong, Y. W.; Lu, J. G.; Quan, Z.; Wang, L.; Wang, Z. G.; Wu, B. B.; Zhang, S. N.

2014-07-01

335

Fast Shower Simulation in the ATLAS Calorimeter  

SciTech Connect

The time to simulate pp collisions in the ATLAS detector is largely dominated by the showering of electromagnetic particles in the heavy parts of the detector, especially the electromagnetic barrel and endcap calorimeters. Two procedures have been developed to accelerate the processing time of electromagnetic particles in these regions: (1) a fast shower parameterisation and (2) a frozen shower library. Both work by generating the response of the calorimeter to electrons and positrons with Geant 4, and then reintroduce the response into the simulation at runtime. In the fast shower parameterisation technique, a parameterization is tuned to single electrons and used later by simulation. In the frozen shower technique, actual showers from low-energy particles are used in the simulation. Full Geant 4 simulation is used to develop showers down to {approx} 1 GeV, at which point the shower is terminated by substituting a frozen shower. Judicious use of both techniques over the entire electromagnetic portion of the ATLAS calorimeter produces an important improvement of CPU time. We discuss the algorithms and their performance in this paper.

Barberio, E.; /Melbourne U.; Boudreau, J.; /Pittsburgh U.; Butler, B.; /SLAC; Cheung, S.L.; /Toronto U.; Dell'Acqua, A.; /CERN; Di Simone, A.; /CERN; Ehrenfeld, W.; /Hamburg U. /DESY; Gallas, M.V.; /CERN; Glazov, A.; /DESY; Marshall, Z.; /Caltech /Nevis Labs, Columbia U.; Mueller, J.; /Pittsburgh U.; Placakyte, R.; /DESY; Rimoldi, A.; /Pavia U. /INFN, Pavia; Savard, P.; /Toronto U.; Tsulaia, V.; /Pittsburgh U.; Waugh, A.; /Sydney U.; Young, C.C.; /SLAC

2011-11-08

336

Simulation studies of hadron energy resolution as a function of iron plate thickness at INO-ICAL  

NASA Astrophysics Data System (ADS)

We report on a detailed simulation study of the hadron energy resolution as a function of the thickness of the absorber plates for the proposed Iron Calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO). We compare the hadron resolutions obtained with absorber thicknesses in the range 1.5–8 cm for neutrino interactions in the energy range 2–15 GeV, which is relevant to hadron production in atmospheric neutrino interactions. We find that at lower energies, the thickness dependence of energy resolution is steeper than at higher energies, however there is a thickness-independent contribution that dominates at the lower thicknesses discussed in this work. As a result, the gain in hadron energy resolution with decreasing plate thickness is marginal. We present the results in the form of fits to a function with energy-dependent exponent.

Lakshmi, S. M.; Ghosh, A.; Devi, M. M.; Kaur, D.; Choubey, S.; Dighe, A.; Indumathi, D.; Murthy, M. V. N.; Naimuddin, Md

2014-09-01

337

South front, west part, showing wrought iron gates and tiling ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

South front, west part, showing wrought iron gates and tiling at the former main entrance. - San Bernardino Valley College, Life Science Building, 701 South Mount Vernon Avenue, San Bernardino, San Bernardino County, CA

338

Self-glazing ceramic tiles based on acidic igneous glasses  

SciTech Connect

A technology was derived to produce self-glazing ceramic tiles based on single-component systems of acidic igneous (volcanic) glasses. A weakly alkaline solution of NaOH or KOH was used as the sealing water to activate the sintering process. Tests conducted on the self-glazing ceramic tiles showed that their water absorption amounts to 2.5-8%, linear shrinkage is 3.2-7%, and frost resistance amounts to 35-70 cycles. The application of acidic igneous glasses as the main raw material for the production of ceramic facing tiles made it possible to widen the raw material base and simplify the technology for fabricating ceramic facing tiles at lower cost. The use of waste products when processing perlite-bearing rocks, when carrying out mining and cutting of tuffs, slags, and tuff breccia for recovering cut materials was recommended.

Merkin, A.P.; Nanazashvili, V.I.

1988-07-01

339

Measurement of Tritium Surface Distribution on TFTR Bumper Limiter Tiles  

SciTech Connect

The tritium surface distribution on graphite tiles used in the Tokamak Fusion Test Reactor (TFTR) bumper limiter and exposed to TFTR deuterium-tritium (D-T) discharges from 1993 to 1997 was measured by the Tritium Imaging Plate Technique (TIPT). The TFTR bumper limiter shows both re-/co-deposition and erosion. The tritium images for all tiles measured are strongly correlated with erosion and deposition patterns, and long-term tritium retention was found in the re-/co-depositions and flakes. The CFC tiles located at erosion dominated areas clearly showed their woven structure in their tritium images owing to different erosion yields between fibers and matrix. Significantly high tritium retention was observed on all sides of the erosion tiles, indicating carbon transport via repetition of local erosion/deposition cycles.

K. Sugiyama; T. Tanabe; C.H. Skinner; C.A. Gentile

2004-06-28

340

Hadron collider physics  

SciTech Connect

An introduction to the techniques of analysis of hadron collider events is presented in the context of the quark-parton model. Production and decay of W and Z intermediate vector bosons are used as examples. The structure of the Electroweak theory is outlined. Three simple FORTRAN programs are introduced, to illustrate Monte Carlo calculation techniques. 25 refs.

Pondrom, L.

1991-10-03

341

The Heavy Hadron Spectrum  

E-print Network

I discuss the spectrum of hadrons containing heavy quarks ($b$ or $c$), and how well the experimental results are matched by theoretical ideas. Useful insights come from potential models and applications of Heavy Quark Symmetry and these can be compared with new numerical results from the ab initio methods of Lattice QCD.

C. T. H. Davies

1997-10-17

342

Speculations in hadron spectroscopy  

E-print Network

A selected survey is presented of the recent progress in hadron spectroscopy. This includes spin-singlet charmonium states, excitations of charmonium and open-charm mesons, double-charm baryons, and pentaquark candidates. Models proposing exotic bound states or resonances are reviewed. The sector of exotic mesons with two heavy quarks appears as particularly promising.

J. -M. Richard

2004-12-17

343

Random tilings with quasicrystal order: transfer-matrix approach  

Microsoft Academic Search

The random tiling of the plane by a set of objects (e.g., rhombi), related by rotational (e.g. tenfold) symmetries, is a paradigm for the formation of quasiperiodic order due to entropy. Such tilings are mapped to a higher-dimensional space where they form hypersurfaces analogous to the interfaces in a solid-on-solid model. The author argues that the fluctuations of the hypersurface

C. L. Henley

1988-01-01

344

Compact Error-Resilient Computational DNA Tiling Assemblies  

Microsoft Academic Search

The self-assembly process for bottom-up construction of nanostructures is of key importance to the emerging of the new scientific discipline of Nanoscience. For exam- ple, the self-assembly of DNA tile nanostructures into 2D and 3D lattices can be used to perform parallel universal computation and to manufacture patterned nanostructures from smaller unit components known as DNA tiles. How- ever, self-assemblies

John H. Reif; Sudheer Sahu; Peng Yin

2004-01-01

345

On the Minimum Weight Steiner Triangular Tiling problem  

SciTech Connect

In this paper, we introduce the Minimum Weight Steiner Triangular Tiling problem, which is a generalization of the Minimum Weight Steiner Triangulation. Contrary to the conjecture of Eppstein that the Minimum Weight Steiner Triangulation of a convex polygon has the property that the Steiner points all lie on the boundary of the polygon [Epp94], we show that the Steiner points of a Minimum Weight Steiner Triangular Tiling could lie in the interior of a convex polygon.

Doddi, S.; Zhu, B.

1995-04-01

346

Front-end Electronics for the ATLAS Tile Calorimeter K. Anderson, J. Pilcher, H. Sanders, F. Tang  

E-print Network

, located inside the steel shield of each PMT block. The 3-in-1 card provides the following functions dynamic range of the system. A block diagram of the system is shown in Figure 1. Bi-gain Analog Circuitry between scales and corre- Fig. 1: Block diagram of front-end electronics. #12;-2- sponds to 3

347

Measurement of the Hadronic Photon-Structure Function at LEP 1 for $l$Angle$Q^{2}$ $r$Angle Values between 9.9 and 284 $GeV^{2}$  

Microsoft Academic Search

Inclusive gamma^*gamma interactions to hadronic final states where one scattered electron or positron is detected in the electromagnetic calorimeters have been studied in the LEP 1 data taken by ALEPH from 1991 to 1995. The event sample has been used to measure the hadronic structure function of the photon F_2^gamma in three bins with of 9.9, 20.7 and 284

R Barate; D Décamp; P Ghez; C Goy; J P Lees; E Merle; M N Minard; B Pietrzyk; R Alemany; M P Casado; M Chmeissani; J M Crespo; E Fernández; M Fernández-Bosman; L Garrido; E Graugès-Pous; A Juste; M Martínez; G Merino; R Miquel; L M Mir; A Pacheco; I C Park; I Riu; A Colaleo; D Creanza; M De Palma; G Gelao; Giuseppe Iaselli; G Maggi; M Maggi; S Nuzzo; A Ranieri; G Raso; F Ruggieri; G Selvaggi; L Silvestris; P Tempesta; A Tricomi; G Zito; X Huang; J Lin; Q Ouyang; T Wang; Y Xie; R Xu; S Xue; J Zhang; L Zhang; W Zhao; D Abbaneo; U Becker; G Boix; M Cattaneo; F Cerutti; V Ciulli; G Dissertori; H Drevermann; Roger W Forty; M Frank; A W Halley; J B Hansen; J Harvey; P Janot; B Jost; Ivan Lehraus; O Leroy; P Mato; Adolf G Minten; A Moutoussi; F Ranjard; Luigi Rolandi; D Rousseau; W D Schlatter; M Schmitt; O Schneider; P Spagnolo; W Tejessy; F Teubert; I R Tomalin; E Tournefier; Ziad J Ajaltouni; F Badaud; G Chazelle; O Deschamps; A Falvard; C Ferdi; P Gay; C Guicheney; P Henrard; J Jousset; B Michel; S Monteil; J C Montret; D Pallin; P Perret; F Podlyski; J D Hansen; J R Hansen; P H Hansen; B S Nilsson; B Rensch; A Wäänänen; G Daskalakis; A Kyriakis; C Markou; Errietta Simopoulou; I Siotis; Anna Vayaki; A Blondel; G R Bonneaud; J C Brient; A Rougé; M Rumpf; M Swynghedauw; M Verderi; H L Videau; E Focardi; G Parrini; K Zachariadou; R J Cavanaugh; M Corden; C H Georgiopoulos; A Antonelli; G Bencivenni; G Bologna; F Bossi; P Campana; G Capon; V Chiarella; P Laurelli; G Mannocchi; F Murtas; G P Murtas; L Passalacqua; M Pepé-Altarelli; L Curtis; J G Lynch; P Negus; V O'Shea; C Raine; P Teixeira-Dias; A S Thompson; O L Buchmüller; S Dhamotharan; C Geweniger; P Hanke; G Hansper; V Hepp; E E Kluge; A Putzer; J Sommer; K Tittel; S Werner; M Wunsch; R Beuselinck; David M Binnie; W Cameron; Peter J Dornan; M Girone; S M Goodsir; E B Martin; N Marinelli; A Sciabà; J K Sedgbeer; E Thomson; M D Williams; V M Ghete; P Girtler; E Kneringer; D Kuhn; G Rudolph; C K Bowdery; P G Buck; A J Finch; F Foster; G Hughes; R W L Jones; N A Robertson; I Giehl; K Jakobs; K Kleinknecht; G Quast; B Renk; E Rohne; H G Sander; H W Wachsmuth; C Zeitnitz; Jean-Jacques Aubert; C Benchouk; A Bonissent; J Carr; P Coyle; F Etienne; A Ealet; F Motsch; P Payre; M Talby; M Thulasidas; M Aleppo; M Antonelli; F Ragusa; V Büscher; H Dietl; G Ganis; K Hüttmann; G Lütjens; C Mannert; W Männer; H G Moser; S Schael; Ronald Settles; H C J Seywerd; H Stenzel; W Wiedenmann; G Wolf; J Boucrot; O Callot; S Chen; A Cordier; M Davier; L Duflot; J F Grivaz; P Heusse; A Jacholkowska; F R Le Diberder; J Lefrançois; A M Lutz; M H Schune; J J Veillet; I Videau; D Zerwas; P Azzurri; G Bagliesi; S Bettarini; T Boccali; C Bozzi; G Calderini; R Dell'Orso; R Fantechi; I Ferrante; L Foà; A Giassi; A Gregorio; F Ligabue; A Lusiani; P S Marrocchesi; A Messineo; Fabrizio Palla; G Rizzo; G Sanguinetti; G Sguazzoni; Roberto Tenchini; C Vannini; A Venturi; P G Verdini; G A Blair; J T Chambers; G D Cowan; M G Green; T Medcalf; J A Strong; J H Von Wimmersperg-Töller; David R Botterill; R W Clifft; T R Edgecock; P R Norton; J C Thompson; A E Wright; B Bloch-Devaux; P Colas; S Emery; Witold Kozanecki; E Lançon; M C Lemaire; E Locci; P Pérez; J Rander; J F Renardy; A Roussarie; J P Schuller; J Schwindling; A Trabelsi; B Vallage; S N Black; J H Dann; R P Johnson; H Y Kim; N P Konstantinidis; A M Litke; M A McNeil; G Taylor; C N Booth; S L Cartwright; F Combley; M S Kelly; M H Lehto; L F Thompson; K Affholderbach; A Böhrer; S Brandt; J Foss; Claus Grupen; G Prange; L Smolik; F Stephan; G Giannini; B Gobbo; J E Rothberg; S R Wasserbaech; S R Armstrong; E Charles; P Elmer; D P S Ferguson; Y Gao; S González; T C Greening; O J Hayes; H Hu; S Jin; G Mamier; P A McNamara; J M Nachtman; J Nielsen; W Orejudos; Y B Pan; Y Saadi; I J Scott; M Vogt; J Walsh; Wu Sau Lan; X Wu; G Zobernig

1999-01-01

348

Fractal Dimension of Particle Showers Measured in a Highly Granular Calorimeter  

E-print Network

We explore the fractal nature of particle showers using Monte-Carlo simulation. We define the fractal dimension of showers measured in a high granularity calorimeter designed for a future lepton collider. The shower fractal dimension reveals detailed information of the spatial configuration of the shower. %the information hidden in the details of shower spatial configuration, It is found to be characteristic of the type of interaction and highly sensitive to the nature of the incident particle. Using the shower fractal dimension, we demonstrate a particle identification algorithm that can efficiently separate electromagnetic showers, hadronic showers and non-showering tracks. We also find a logarithmic dependence of the shower fractal dimension on the particle energy.

Manqi Ruan; Daniel Jeans; Vincent Boudry; Jean-Claude Brient; Henri Videau

2013-12-30

349

Extracting hadron-neutron scattering amplitudes from hadron-proton and hadron-deuteron measurements  

NASA Technical Reports Server (NTRS)

A method is presented for extracting hadron-neutron scattering amplitudes from hadron-proton and hadron-deuteron measurements within the framework of the Glauber approximation. This method, which involves the solution of a linear integral equation, is applied to pn collisions between 15 and 275 GeV/c. Effects arising from inelastic intermediate states are estimated.

Franco, V.

1977-01-01

350

The design of the data acquisition system for a very large bismuth germanate calorimeter  

SciTech Connect

LEPC, the Large Electron Positron Collider being built at CERN, will be ready for experiments in 1988. A large array of bismuth germanate crystals will be part of one of the first experiments to be installed. Particles (including photons) resulting from the collisions will be identified and measured in the surrounding detector. At the center of this composite detector is a tracking device to observe the trajectories of all particles. Beyond this is the bismuth germanate array; it will measure the energy of electrons and photons from a few MeV to 100 GeV. This is surrounded by the hadron calorimeter. The bismuth germanate calorimeter will consist of about 12,000 individual bismuth germanate crystals. Each crystal will have an independent readout system. This system uses silicon photodiodes, each with its own ADC, to measure the scintillation light from each crystal. The ADC is implemented in software in a single chip microcomputer, using a modification of successive approximation, which produces a very wide dynamic range. The microcomputer also provides data buffering and several other housekeeping functions. The initial design of the readout system, presented in this paper, evolved from an attempt to minimize the size requirements and the number of cables needed, and to meet the dynamic range requirement in a practical way.

Bakken, J.; Isaila, M.; Piroue, P.; Stickland, D.; Sumner, R.

1984-02-01

351

Are Tiled Display Walls Needed for Astronomy?  

NASA Astrophysics Data System (ADS)

Clustering commodity displays into a Tiled Display Wall (TDW) provides a cost-effective way to create an extremely high resolution display, capable of approaching the image sizes now generated by modern astronomical instruments. Many research institutions have constructed TDWs on the basis that they will improve the scientific outcomes of astronomical imagery. We test this concept by presenting sample images to astronomers and non-astronomers using a standard desktop display (SDD) and a TDW. These samples include standard English words, wide field galaxy surveys and nebulae mosaics from the Hubble telescope. Our experiments show that TDWs provide a better environment than SDDs for searching for small targets in large images. They also show that astronomers tend to be better at searching images for targets than non-astronomers, both groups are generally better when employing physical navigation as opposed to virtual navigation, and that the combination of two non-astronomers using a TDW rivals the experience of a single astronomer. However, there is also a large distribution in aptitude amongst the participants and the nature of the content also plays a significant role in success.

Meade, Bernard F.; Fluke, Christopher J.; Manos, Steven; Sinnott, Richard O.

2014-08-01

352

D0 Decomissioning : Storage of Depleted Uranium Modules Inside D0 Calorimeters after the Termination of D0 Experiment  

SciTech Connect

Dzero liquid Argon calorimeters contain hadronic modules made of depleted uranium plates. After the termination of DO detector's operation, liquid Argon will be transferred back to Argon storage Dewar, and all three calorimeters will be warmed up. At this point, there is no intention to disassemble the calorimeters. The depleted uranium modules will stay inside the cryostats. Depleted uranium is a by-product of the uranium enrichment process. It is slightly radioactive, emits alpha, beta and gamma radiation. External radiation hazards are minimal. Alpha radiation has no external exposure hazards, as dead layers of skin stop it; beta radiation might have effects only when there is a direct contact with skin; and gamma rays are negligible - levels are extremely low. Depleted uranium is a pyrophoric material. Small particles (such as shavings, powder etc.) may ignite with presence of Oxygen (air). Also, in presence of air and moisture it can oxidize. Depleted uranium can absorb moisture and keep oxidizing later, even after air and moisture are excluded. Uranium oxide can powder and flake off. This powder is also pyrographic. Uranium oxide may create health problems if inhaled. Since uranium oxide is water soluble, it may enter the bloodstream and cause toxic effects.

Sarychev, Michael; /Fermilab

2011-09-21

353

Foam on Tile Impact Modeling for the STS-107 Investigation  

NASA Technical Reports Server (NTRS)

Following the breakup of the Space Shuttle Columbia during reentry a NASA/Contractor investigation team was formed to examine the probable damage inflicted on Orbiter Thermal Protection System elements by impact of External Tank insulating foam projectiles. The authors formed a working subgroup within the larger team to apply the Smooth Particle Hydrodynamics code SPHC to the damage estimation problem. Numerical models of the Orbiter's tiles and of the Tank's foam were constructed and used as inputs into the code. Material properties needed to properly model the tiles and foam were obtained from other working subgroups who performed tests on these items for this purpose. Two- and three-dimensional models of the tiles were constructed, including the glass outer layer, the main body of LI-900 insulation, the densified lower layer of LI-900, the Nomex felt mounting layer, and the Aluminum 2024 vehicle skin. A model for the BX-250 foam including porous compression, elastic rebound, and surface erosion was developed. Code results for the tile damage and foam behavior were extensively validated through comparison with Southwest Research Institute foam-on-tile impact experiments carried out in 1999. These tests involved small projectiles striking individual tiles and small tile arrays. Following code and model validation we simulated impacts of larger foam projectiles on the examples of tile systems used on the Orbiter. Results for impacts on the main landing gear door are presented in this paper, including effects of impacts at several angles, and of rapidly rotating projectiles. General results suggest that foam impacts on tiles at about 500 mph could cause appreciable damage if the impact angle is greater than about 20 degrees. Some variations of the foam properties, such as increased brittleness or increased density could increase damage in some cases. Rotation up to 17 rps failed to increase the damage for the two cases considered. This does not rule out other cases in which the rotational energy might lead to an increase in tile damage, but suggests that in most cases rotation will not be an important factor.

Stellingwerf, R. F.; Robinson, J. H.; Richardson, S.; Evans, S. W.; Stallworth, R.; Hovater, M.

2004-01-01

354

Phase change material in floor tiles for thermal energy storage  

NASA Astrophysics Data System (ADS)

Traditional passive solar systems have relied on sensible heat storage for energy savings. Recent research has investigated taking advantage of latent heat storage for additional energy savings. This is accomplished by the incorporation of phase change material into building materials used in traditional passive applications. Trombe walls, ceilings and floors can all be enhanced with phase change materials. This research introduces a new flooring material that incorporates a phase change material ready for commercial manufacture. An agglomerate floor tile containing 20% by mass of encapsulated octadecane has been manufactured. Flexural and compressive strength of 7.4 MPa and 24.5 MPa respectively, were measured for the tile. Peak melting transition temperature was determined to be 27.2°C with a latent heat of 33.9 J/g of tile. Structural and thermal performance of the tile surpassed that of a typical ceramic tile. Each tile was composed of quartz, resin and phase change material. Statistical modeling was performed to analyze the response of flexural and compressive strength on varying amounts of quartz, resin and phase change material. Resulting polynomials described the effect of adding phase change material into the tile. With as little as 10% by mass of phase change material, the strength was reduced to less than 50% of tile without phase change material. It was determined that the maximum phase change material content to attain structural integrity greater than ceramic tile was 20% by mass. The statistical analysis used for this research was based on mixture experiments. A procedure was developed to simplify the selection of data points used in the fit of the polynomials to describe the response of flexural and compressive strengths. Analysis of energy savings using this floor tile containing 20% by mass of phase change material was performed as an addendum to this research. A known static simulation method, SLR (solar load ratio), was adapted to include latent heat storage. In addition a dynamic simulation was also performed using BLAST. The program had to be modified to simulate latent heat storage. Annual heating consumptions from both methods were estimated to be reduced by approximately 5%.

Lee, Amy Sarah

355

Hadron Spectroscopy with COMPASS  

E-print Network

COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron aimed at studying the structure and spectrum of hadrons. One primary goal is the search for new hadronic states, in particular spin-exotic mesons and glueballs. We present recent results of partial-wave analyses of (3\\pi)^- and \\pi^-\\eta' final states based on a large data set of diffractive dissociation of a 190 GeV/c \\pi^- beam on a proton target in the squared four-momentum-transfer range 0.1 < t' < 1 (GeV/c)^2. We also show first results from a partial-wave analysis of diffractive dissociation of K^- into K^-\\pi^+\\pi^- final states are presented.

Boris Grube; for the COMPASS Collaboration

2011-08-29

356

Heavy Hadron Molecules  

SciTech Connect

The open charm mesons D{sub s0}*(2317), D{sub s1}(2460) and the hidden charm meson X(3872) are discussed as hadron molecules. Using a phenomenological Lagrangian approach we consider the strong and radiative decays of the D{sub s0}*(2317) and D{sub s1}(2460) states. The X(3872) is assumed to consist dominantly of molecular hadronic components with an additional small admixture of a charmonium configuration. Observed radiative ({gamma}J/{psi} and {gamma}{psi}(2s)) and strong (J/{psi}2{pi} and J/{psi}3{pi}) decays are shown to be consistent with the molecular structure assumption of the X(3872).

Gutsche, Thomas; Lyubovitskij, Valery E. [Institut fuer Theoretische Physik, Universitaet Tuebingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

2010-08-05

357

Thermochemistry : CoffeeCupCalorimeter (2 Variations)  

NSDL National Science Digital Library

A block of copper is heated to {x} °C and then is dropped into a coffee cup calorimeter containing {y} g of water at 25.0 °C. The final temperature of the system is 45.1 °C. What is the mass of the copper block to the nearest gram? (Assume all heat is transferred to the water). Write your answer in the box, and do NOT include units. Specific heat capacity of copper = 0.383 J/(g*°C) Specific heat capacity of water = 4.18 J/(g*°C)

358

Status of the lead tungstate crystal calorimeter of CMS  

NASA Astrophysics Data System (ADS)

In this talk, the main design features of the electromagnetic calorimeter of the CMS experiment at LHC are briefly reviewed and the current state of the production and R&D on lead tungstate crystals is summarized. The planned steps for the realisation of the calorimeter until installation in the LHC pit are indicated.

Schneegans, M.

1997-03-01

359

A calorimeter and cryostat for measuring heats of physical adsorption  

Microsoft Academic Search

A non-adiabatic calorimeter and its associated cryostat are described. The equipment is designed for the accurate determination of heats of physical adsorption and desorption by calorimetry and for the simultaneous measurement of heats from the temperature coefficient of the equilibrium gas pressures.This type of calorimeter has been successfully used (i) at liquid nitrogen temperatures, in studying the thermodynamics of the

G L Kington; P S Smith

1964-01-01

360

Precision two-compartment bomb calorimeter for combustion in fluorine  

Microsoft Academic Search

An isothermally jacketed liquid calorimeter permitting thermochemical studies on spontaneous combustion in fluorine has been built and tested. The fluorine storage tank was located outside the calorimeter vessel, thus lowering the heat capacity of the system and its thermal inertia. Particular attention was paid to the method and rate of liquid circulation since it largely determines the experimental accuracy. The

H. Lenski; D. Böhler

1980-01-01

361

Commissioning Experience With the ATLAS Level1 Calorimeter Trigger System  

Microsoft Academic Search

The ATLAS Level-1 Calorimeter Trigger is one of the main elements of the first stage of event selection for the ATLAS experiment at the LHC. The input stage consists of a mixed analogue\\/digital component taking trigger sums from the ATLAS calorimeters. The trigger logic is performed in a digital, pipelined system with several stages of processing, largely based on FPGAs,

R. Achenbach; P. Adragna; V. Andrei; B. M. Barnett; B. Bauss; M. Bendel; C. Bohm; J. R. A. Booth; I. P. Brawn; D. G. Charlton; C. J. Curtis; A. O. Davis; E. Eisenhandler; P. J. W. Faulkner; F. Fohlisch; C. N. P. Gee; C. Geweniger; A. R. Gillman; P. Hanke; S. Hellman; A. Hidvegi; S. J. Hillier; M. Johansen; E.-E. Kluge; M. Landon; V. Lendermann; K. Mahboubi; G. Mahout; K. Meier; A. Neusiedl; V. J. O. Perera; D. P. F. Prieur; W. Qian; S. Rieke; F. Ruhr; D. P. C. Sankey; U. Schafer; K. Schmitt; H. C. Schultz-Coulon; S. Silverstein; R. J. Staley; R. Stamen; S. Tapprogge; J. P. Thomas; T. Trefzger; P. M. Watkins; A. Watson; P. Weber; E.-E. Woehrling

2008-01-01

362

Large Hadron Rap  

NSDL National Science Digital Library

This YouTube video, created by Kate McAlpine, features a rap song created to commemorate the start-up of The Large Hadron Collider (LHC). The rap lyrics present the theories that the LHC will test, as well as many of the challenges and questions of the standard model of particle physics. The video was shot at various parts of the LHC.

2008-10-10

363

Electromagnetic polarizabilities of hadrons  

SciTech Connect

Electromagnetic polarizabilities of hadrons are reviewed, after a discussion of classical analogues. Differences between relativistic and non-relativistic approaches can lead to conflicts with conventional nuclear physics sum rules and calculational techniques. The nucleon polarizabilities are discussed in the context of the non-relativistic valence quark model, which provides a good qualitative description. The recently measured pion polarizabilities are discussed in the context of chiral symmetry and quark-loop models. 58 refs., 5 figs.

Friar, J.L.

1988-01-01

364

The Large Hadron Collider  

NSDL National Science Digital Library

This article on the CERN website provides an explanation the importance of the Large Hadron Collider--a particle accelerator that is an international collaboration--and how its results will help improve our understanding of the conditions of the universe just after the Big Bang. The site provides descriptions of why the LHC was built, how it works, its various experiments, and also safety considerations.

2008-09-23

365

Construction of 2D quasi-periodic Rauzy tiling by similarity transformation  

SciTech Connect

A new approach to constructing self-similar fractal tilings is proposed based on the construction of semigroups generated by a finite set of similarity transformations. The Rauzy tiling-a 2D analog of 1D Fibonacci tiling generated by the golden mean-is used as an example to illustrate this approach. It is shown that the Rauzy torus development and the elementary fractal boundary of Rauzy tiling can be constructed in the form of a set of centers of similarity semigroups generated by two and three similarity transformations, respectively. A centrosymmetric tiling, locally dual to the Rauzy tiling, is constructed for the first time and its parameterization is developed.

Zhuravlev, V. G.; Maleev, A. V., E-mail: andr_mal@mail.ru [Vladimir State Humanitarian University (Russian Federation)

2009-05-15

366

Closed Gap Slug Calorimeter for Plasma Stream Characterization  

NASA Technical Reports Server (NTRS)

Slug calorimeters are used in sheer and stagnation mode to characterize heat flux levels for high enthalpy streams. The traditional design features a gap between slug and holder, which can be of concern in these convective heat flux environments. The challenge is to develop a calorimeter that closes the gap to gas flow, but largely maintains thermal insulation of the slug. The work presented herein introduces two new slug calorimeter designs featuring a closed gap. This is done using either aerogel as a filler or press fitting the slug with a disk. The designs were verified and compared to the baseline calorimeter design under radiative heat flux. Building on this, the calorimeters were exposed to convective heat flux in the arc-jet facilities. Results from the new designs and conclusions on the impact of the gap in convective heat flux will be shown.

Nawaz, Anuscheh; Gorbunov, Sergey; Terrazas-Salinas, Imelda; Jones, Steven M.

2012-01-01

367

Development of a small angle hadron calorimeter prototype for the Collider Detector at Fermilab  

E-print Network

was the winding and soldering. We placed the 25 pm gold-flashed tungsten anode wires with a winding machine, see Figures 4 and 5. The wires were spaced 0. 866 mm apart and 5 mm above the cathode plane. Using the winding machine, we wound two chambers at once... was the winding and soldering. We placed the 25 pm gold-flashed tungsten anode wires with a winding machine, see Figures 4 and 5. The wires were spaced 0. 866 mm apart and 5 mm above the cathode plane. Using the winding machine, we wound two chambers at once...

Thane, John Mark

2012-06-07

368

Progress on the upgrade of the CMS Hadron Calorimeter Front-End electronics  

SciTech Connect

We present a scheme to upgrade the CMS HCAL front-end electronics in the second long shutdown to upgrade the LHC (LS2), which is expected to occur around 2018. The HCAL electronics upgrade is required to handle the major instantaneous luminosity increase (up to 5 * 10{sup 34} cm{sup -2} s{sup -1}) and an expected integrated luminosity of {approx}3000 fb{sup -1}. A key aspect of the HCAL upgrade is to read out longitudinal segmentation information to improve background rejection, energy resolution, and electron isolation at the L1 trigger. This paper focuses on the requirements for the new electronics and on the proposed solutions. The requirements include increased channel count, additional timing capabilities, and additional redundancy. The electronics are required to operate in a harsh environment and are constrained by the existing infrastructure. The proposed solutions span from chip level to system level. They include the development of a new ASIC ADC, the design and testing of higher speed transmitters to handle the increased data volume, the evaluation and use of circuits from other developments, evaluation of commercial FPGAs, better thermal design, and improvements in the overall readout architecture. We will report on the progress of the designs for these upgraded systems, along with performance requirements and initial design studies.

Anderson, Jake; Whitmore, Juliana; /Fermilab

2011-11-01

369

Short and Long Term Upgrade Scenarios for the CMS Hadronic Calorimeter  

E-print Network

of Fundamental Forces SupersymmetrySupersymmetry Why gravity is so weak? ­ Extra dimensions How about blackholes. Akgun et al. "Radiation Damage and Reflectivity Studies on Air Core Light Guides", IEEE Transactions

Akgun, Ugur

370

Recent results on radiation hardness tests of WLS fibers for the ATLAS Tilecal hadronic calorimeter  

Microsoft Academic Search

Three types of fibers, that were candidates to be used in the Tilecal\\/ATLAS detector were irradiated in a 60Co? source. The degradation of the light output and attenuation length were measured a few hours and several days after the end of the irradiation. The results are presented.

M. J Varanda; M. David; A. Gomes; A. Maio

2000-01-01

371

Progress on the Upgrade of the CMS Hadron Calorimeter Front-End Electronics  

NASA Astrophysics Data System (ADS)

We present a scheme to upgrade the CMS HCAL front-end electronics in the second long shutdown to upgrade the LHC (LS2), which is expected to occur around 2018. The HCAL electronics upgrade is required to handle the major instantaneous luminosity increase (up to 5 * 1034 cm-2 s-1) and an expected integrated luminosity of ˜3000 fb-1. A key aspect of the HCAL upgrade is to read out longitudinal segmentation information to improve background rejection, energy resolution, and electron isolation at the L1 trigger. This paper focuses on the requirements for the new electronics and on the proposed solutions. The requirements include increased channel count, additional timing capabilities, and additional redundancy. The electronics are required to operate in a high radiation/high magnetic field environment and are constrained by the existing infrastructure (existing on-detector custom crates, legacy optical fiber, existing water cooling plant, tight trigger latency requirement). The proposed solutions span from chip level to system level. They include the development of a new ASIC ADC, the design and testing of higher speed transmitters to handle the increased data volume, the evaluation and use of circuits from other developments, evaluation of commercial FPGAs, better thermal design, and improvements in the overall readout architecture. We will report on the progress of the designs for these upgraded systems, along with performance requirements and initial design studies.

Anderson, Jake; Freeman, Jim; Whitmore, Juliana; the CMS HCAL Collaboration

372

Measurement of Hadronic Event Shapes and Jet Substructure in Proton-Proton Collisions at 7.0 TeV Center-of-Mass Energy with the ATLAS Detector at the Large Hadron Collider  

SciTech Connect

This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of {radical}s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Results are presented at the particle-level, permitting comparisons to multiple Monte Carlo event generator tools. Numerous tools and techniques that enable detailed analysis of the hadronic final state at high luminosity are described. The approaches presented utilize the dual strengths of the ATLAS calorimeter and tracking systems to provide high resolution and robust measurements of the hadronic jets that constitute both a background and a signal throughout ATLAS physics analyses. The study of the hadronic final state is then extended to jet substructure, where the energy flow and topology within individual jets is studied at the detector level and techniques for estimating systematic uncertainties for such measurements are commissioned in the first data. These first substructure measurements in ATLAS include the jet mass and sub-jet multiplicity as well as those concerned with multi-body hadronic decays and color flow within jets. Finally, the first boosted hadronic object observed at the LHC - the decay of the top quark to a single jet - is presented.

Miller, David Wilkins

2012-03-20

373

Hadron spectrum and hadrons in the nuclear medium  

E-print Network

Some recent developments in chiral dynamics of hadrons and hadrons in a medium are presented. Unitary schemes based on chiral Lagrangians describe some hadronic states as being dynamically generated resonances. We discuss how standard quantum many body techniques can be used to calculate the properties of these dynamically generated and other hadrons in the nuclear medium. We present some results for vector mesons ($\\rho$ and $\\phi$), scalar mesons ($\\sigma$, $\\kappa$, $a_0(980)$, $f_0(980)$), the $\\Lambda(1520)$ and for the in-medium baryon-baryon interaction.

M. J. Vicente Vacas

2006-10-09

374

Microwave versus conventional sintering of silicon carbide tiles  

SciTech Connect

Silicon carbide is being evaluated as an armor material because of its lightweight, high-hardness, and excellent armor efficiency. However, one of the problems associated with silicon carbide is the high cost associated with achieving fully dense tiles. Full density requires either hot pressing and sintering or reaction bonding. Past efforts have shown that hot pressed tiles have a higher armor efficiency than those produced by reaction bonded sintering. An earlier stuy showed that the acoustic properties of fully-dense silicon carbide tiles were enhanced through the use of post-sintered microwave heat treatments. One of the least expensive forming techniques is to isostatically press-and-sinter. In this study, the authors have used microwave energy to densify silicon carbide green bodies. Microwave sintering has been demonstrated to be a very quick way to sinter ceramics such as alumina to exceptionally high densities. Previous work has shown that microwave post treatment of fully-dense reaction bonded silicon carbide tiles significantly improves the acoustic properties of the tiles. These properties include Poisson`s ratio, Young`s modulus, shear modulus, and bulk modulus.

Kass, M.D.; Caughman, J.B.O.; Forrester, S.C.; Akerman, A.

1997-05-07

375

Transportable calorimeter measurements of highly enriched uranium  

SciTech Connect

A sensitive calorimeter has been combined with a small temperature-controlled water bath to compose a transportable system that is capable of measuring multikilogram quantities of highly enriched uranium (HEU). The sample chamber size, 5 in. in diameter by 10 in. high, is large enough to hold sufficient HEU metal or high-grade scrap to provide a measurable thermal signal. Calorimetric measurements performed on well-characterized material indicate that the thermal power generated by 93% {sup 235}U samples with 1.0% {sup 234}U can be measured with a precision of about 1% (1 sigma) for 4-kg samples. The transportable system consists of a twin-bridge calorimeter installed inside a 55-gal. stainless steel drum filled with water with heating and cooling supplied by a removable thermoelectric module attached to the side. Isotopic measurements using high-resolution gamma-ray measurements of the HEU samples and analysis with the FRAM code were used to determine the isotopic ratios and specific power of the samples. This information was used to transform the measured thermal power into grams of HEU. Because no physical standards are required, this system could be used for the verification of plutonium, {sup 238}Pu heat sources, or large quantities of metal or other high-grade matrix forms of HEU.

Rudy, C.; Bracken, D.S.; Staples, P.; Carrillo, L.

1997-11-01

376

Thermal effects on the STAR electromagnetic calorimeter  

SciTech Connect

The STAR detector for the RHIC colliding beam accelerator is under construction at Brookhaven National Laboratory. This detector will consist of a number of subsystems. These include a silicon vertex detector (SVT) for charged particle tracks near the interaction region, a time projection chamber (TPC) for charged particle tracking, an array of plastic scintillation counters (CTB) in a layer around the TPC for triggering on charged particles, a conventional solenoidal magnet, and some additional small triggering detectors along the beam-line. An electromagnetic calorimeter (EMC) is an upgrade to the ``baseline`` detector configuration above. The conventional magnet and numerous electronic channels for the SVT and TPC subsystems will generate a considerable amount of heat during the operation of STAR. However, it is possible that a chiller for the magnet cooling water will not be available during some of the early STAR runs. As a result, the average magnet temperature may vary considerably between winter and summer. This note summarizes calculations and measurements performed to evaluate the effects of an elevated magnet temperature on the performance of the electromagnetic calorimeter.

Fornek, T.; Guarino, V.; Spinka, H.; Underwood, D. [Argonne National Lab., IL (United States). High Energy Physics Div.

1994-07-19

377

Constructions of complex Hadamard matrices via tiling Abelian groups  

E-print Network

Applications in quantum information theory and quantum tomography have raised current interest in complex Hadamard matrices. In this note we investigate the connection between tiling Abelian groups and constructions of complex Hadamard matrices. First, we recover a recent very general construction of complex Hadamard matrices due to Dita via a natural tiling construction. Then we find some necessary conditions for any given complex Hadamard matrix to be equivalent to a Dita-type matrix. Finally, using another tiling construction, due to Szabo, we arrive at new parametric families of complex Hadamard matrices of order 8, 12 and 16, and we use our necessary conditions to prove that these families do not arise with Dita's construction. These new families complement the recent catalogue of complex Hadamard matrices of small order.

Máté Matolcsi; Júlia Réffy; Ferenc Szöll?si

2006-07-11

378

Solare Cell Roof Tile And Method Of Forming Same  

DOEpatents

A solar cell roof tile includes a front support layer, a transparent encapsulant layer, a plurality of interconnected solar cells and a backskin layer. The front support layer is formed of light transmitting material and has first and second surfaces. The transparent encapsulant layer is disposed adjacent the second surface of the front support layer. The interconnected solar cells has a first surface disposed adjacent the transparent encapsulant layer. The backskin layer has a first surface disposed adjacent a second surface of the interconnected solar cells, wherein a portion of the backskin layer wraps around and contacts the first surface of the front support layer to form the border region. A portion of the border region has an extended width. The solar cell roof tile may have stand-offs disposed on the extended width border region for providing vertical spacing with respect to an adjacent solar cell roof tile.

Hanoka, Jack I. (Brookline, MA); Real, Markus (Oberberg, CH)

1999-11-16

379

Efficacy of photon cleaning of JET divertor tiles  

NASA Astrophysics Data System (ADS)

Photon cleaning by means of a flash-lamp was used for in-situ detritiation of the inner wall tiles of the JET divertor in May 2004. Additional trials were also performed ex-situ in October 2004 on divertor base tiles. Early work confirmed that for pulse energies between 150 J and 300 J some deposited material was removed. To increase the amount of material removed during photon cleaning, further experiments with higher pulse energies (500 J) were performed and are reported here. Analysis of cross sections confirmed a removal rate of 0.04 ?m/pulse, removing ˜80 ?m from 200 ?m thick deposits over a treatment area of 15 × 10-4 m2. During the photon cleaning tests at least 12% of the tritium inventory for the tile was removed. It was also shown that deuterium was desorbed from a depth ˜7 ?m beyond the depth of material removed.

Jet-Efda Contributors; Widdowson, A.; Coad, J. P.; Bekris, N.; Counsell, G.; Forrest, M. J.; Gibson, K. J.; Hole, D.; Likonen, J.; Parsons, W.; Renvall, T.; Rubel, M.; JET-EFDA Contributors1

2007-06-01

380

Flutter Analysis of the Shuttle Tile Overlay Repair Concept  

NASA Technical Reports Server (NTRS)

The Space Shuttle tile overlay repair concept, developed at the NASA Johnson Space Center, is designed for on-orbit installation over an area of damaged tile to permit safe re-entry. The thin flexible plate is placed over the damaged area and secured to tile at discreet points around its perimeter. A series of flutter analyses were performed to determine if the onset of flutter met the required safety margins. Normal vibration modes of the panel, obtained from a simplified structural analysis of the installed concept, were combined with a series of aerodynamic analyses of increasing levels of fidelity in terms of modeling the flow physics to determine the onset of flutter. Results from these analyses indicate that it is unlikely that the overlay installed at body point 1800 will flutter during re-entry.

Bey, Kim S.; Scott, Robert C.; Bartels, Robert E.; Waters, William A.; Chen, Roger

2007-01-01

381

New perspectives on forbidden symmetries, quasicrystals, and Penrose tilings  

PubMed Central

Quasicrystals are solids with quasiperiodic atomic structures and symmetries forbidden to ordinary periodic crystals—e.g., 5-fold symmetry axes. A powerful model for understanding their structure and properties has been the two-dimensional Penrose tiling. Recently discovered properties of Penrose tilings suggest a simple picture of the structure of quasicrystals and shed new light on why they form. The results show that quasicrystals can be constructed from a single repeating cluster of atoms and that the rigid matching rules of Penrose tilings can be replaced by more physically plausible cluster energetics. The new concepts make the conditions for forming quasicrystals appear to be closely related to the conditions for forming periodic crystals. PMID:8962037

Steinhardt, Paul J.

1996-01-01

382

Transcript profiling in Arabidopsis with genome tiling microarrays.  

PubMed

Microarray technology is at present a standardized workflow for genome-wide expression analysis. Whole-genome tiling microarrays have emerged as an important platform for flexible and comprehensive expression profiling. In this chapter we describe a detailed standardized workflow for experiments assessing the transcriptome of Arabidopsis using tiling arrays and provide useful hints for critical steps from experimental design to data analysis. Although the protocol is optimized for AGRONOMICS1 arrays, it can readily be adapted to other tiling arrays. AGRONOMICS1 is the first platform that enables strand-specific expression analysis of the Arabidopsis genome with a single array. Moreover, it includes all perfect match probes from the original ATH1 array, allowing readily integration with the large existing ATH1 knowledge base. This workflow is designed for the analysis of raw data for any number of samples and it does not pose any particular hardware requirements. PMID:23975784

Coman, Diana; Gruissem, Wilhelm; Hennig, Lars

2013-01-01

383

Combined Liquid Xenon and crystal CsI calorimeter of the CMD-3 detector  

NASA Astrophysics Data System (ADS)

The barrel electromagnetic calorimeter of the CMD-3 detector consists of two subsystems: the Liquid Xenon calorimeter and the calorimeter based on CsI scintillation crystals. Its structure and main characteristics are presented. The energy calibration procedures of the combined calorimeter are described.

Shebalin, V. E.; Anisenkov, A. V.; Bashtovoy, N. S.; Epifanov, D. A.; Erofeev, A. L.; Grebenuk, A. A.; Karpov, S. V.; Khazin, B. I.; Kovalenko, O. A.; Kozyrev, A. N.; Kuzmin, A. S.; Mikhailov, K. Yu; Razuvaev, G. P.; Ruban, A. A.; Shwartz, B. A.; Titov, V. M.; Talyshev, A. A.; Yudin, Yu V.

2014-10-01

384

PHASE CHANGE MATERIALS IN FLOOR TILES FOR THERMAL ENERGY STORAGE  

SciTech Connect

Passive solar systems integrated into residential structures significantly reduce heating energy consumption. Taking advantage of latent heat storage has further increased energy savings. This is accomplished by the incorporation of phase change materials into building materials used in passive applications. Trombe walls, ceilings and floors can all be enhanced with phase change materials. Increasing the thermal storage of floor tile by the addition of encapsulated paraffin wax is the proposed topic of research. Latent heat storage of a phase change material (PCM) is obtained during a change in phase. Typical materials use the latent heat released when the material changes from a liquid to a solid. Paraffin wax and salt hydrates are examples of such materials. Other PCMs that have been recently investigated undergo a phase transition from one solid form to another. During this process they will release heat. These are known as solid-state phase change materials. All have large latent heats, which makes them ideal for passive solar applications. Easy incorporation into various building materials is must for these materials. This proposal will address the advantages and disadvantages of using these materials in floor tile. Prototype tile will be made from a mixture of quartz, binder and phase change material. The thermal and structural properties of the prototype tiles will be tested fully. It is expected that with the addition of the phase change material the structural properties will be compromised to some extent. The ratio of phase change material in the tile will have to be varied to determine the best mixture to provide significant thermal storage, while maintaining structural properties that meet the industry standards for floor tile.

Douglas C. Hittle

2002-10-01

385

School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles  

E-print Network

School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles Lead: Lharne Shaw 3D printing tile production. It will also assess the feasibility of introducing a 3D slip printing system into both

Evans, Paul

386

Tony Rollins fashions a new tile for the Space Shuttle orbiter  

NASA Technical Reports Server (NTRS)

In the Tile Fabrication Shop, Tony Rollins, with United Space Alliance, holds down a curtain while making a test sample of tile on a block 5-axis computerized numerical control milling machine. About 70 percent of a Space Shuttle orbiter's external surface is shielded from heat by a network of more than 24,000 tiles formed from a silica fiber compound. They are known as High-Temperature Reusable Surface Insulation (HRSI) tiles and Low-Temperature Reusable Surface Insulation (LRSI) tiles. Most HRSI tiles are 6 inches square, but may be as large as 12 inches in some areas, and 1 to 5 inches thick. LRSI tiles are generally 8 inches square, ranging from 0.2- to 1-inch thick. More advanced materials such as Flexible Insulation Blankets have replaced tiles on some upper surfaces of the orbiter.

1998-01-01

387

Hadron accelerators for radiotherapy  

E-print Network

Over the last twenty years the treatment of cancer with protons and light nuclei such as carbon ions has moved from being the preserve of research laboratories into widespread clinical use. A number of choices now exist for the creation and delivery of these particles, key amongst these being the adoption of pencil beam scanning using a rotating gantry; attention is now being given to what technologies will enable cheaper and more effective treatment in the future. In this article the physics and engineering used in these hadron therapy facilities is presented, and the research areas likely to

Owen, H; Peach, K; Smith, S

2014-01-01

388

Monte Carlo event generators for hadron-hadron collisions  

SciTech Connect

A brief review of Monte Carlo event generators for simulating hadron-hadron collisions is presented. Particular emphasis is placed on comparisons of the approaches used to describe physics elements and identifying their relative merits and weaknesses. This review summarizes a more detailed report.

Knowles, I.G. [Argonne National Lab., IL (United States). High Energy Physics Div.; Protopopescu, S.D. [Brookhaven National Lab., Upton, NY (United States)

1993-06-01

389

Features of the absorption of 2-to 40-TeV cosmic-ray hadrons in lead  

SciTech Connect

For the first time, experimental data on 2-to 40-TeV hadronic cascades recorded by a lead ionization calorimeter at the Tien-Shan mountain station of the Lebedev Institute of Physics (Moscow) are compared with the results of a present-day simulation based on the GEANT 3.21 code and performed with allowance for the detection procedure. The conclusion that along-flying component appears in high-energy hadronic cascades was drawn previously on the basis of these data. Some special features of the procedure for recording TeV-range hadrons in the calorimeter are considered. It is shown that the averaged hadronic cascades and various features of single cascades having energies below 10 TeV are simulated adequately by using the QGSJET + FLUKA generators of nuclear interactions, but that they are not described by using the GHEISHA generator at lower energies. Some features of the experimentally observed cascades could not be described for cascade energies above 10 TeV.

Sveshnikova, L. G. [Moscow State University, Institute of Nuclear Physics (Russian Federation)], E-mail: sws@dec1.sinp.msu.ru; Yakovlev, V. I. [Russian Academy of Sciences, Lebedev Institute of Physics (Russian Federation); Turundaevskii, A. N. [Moscow State University, Institute of Nuclear Physics (Russian Federation); Galkin, V. I. [Moscow State University, Department of Physics (Russian Federation); Nazarov, S. I.; Podorozhnyi, D. M. [Moscow State University, Institute of Nuclear Physics (Russian Federation); Popova, N. S. [Moscow State University, Department of Physics (Russian Federation); Roganova, T. M. [Moscow State University, Institute of Nuclear Physics (Russian Federation)

2006-02-15

390

PHENIX Measurement of High-$p_T$ Hadron-hadron and Photon-hadron Azimuthal Correlations  

E-print Network

High-$p_T$ hadron-hadron correlations have been measured with the PHENIX experiment in $\\Cu$ and $\\pp$ collisions at $\\sqrt{s_{NN}}=200$ GeV. A comparison of the jet widths and yields between the two colliding systems allows us to study the medium effect on jets. We also present a first measurement of direct photon-hadron correlations in $\\Au$ and $\\pp$ collisions. We find that the near-side yields are consistent with zero in both systems. By comparing the jet yields on the away side, we observe a suggestion of the expected suppression of hadrons associated with photons in $\\Au$ collisions.

J Jin

2007-05-07

391

Steep-Slope Assembly Testing of Clay and Concrete Tile With and Without Cool Pigmented Colors  

SciTech Connect

Cool color pigments and sub-tile venting of clay and concrete tile roofs significantly impact the heat flow crossing the roof deck of a steep-slope roof. Field measures for the tile roofs revealed a 70% drop in the peak heat flow crossing the deck as compared to a direct-nailed asphalt shingle roof. The Tile Roofing Institute (TRI) and its affiliate members are keenly interested in documenting the magnitude of the drop for obtaining solar reflectance credits with state and federal "cool roof" building efficiency standards. Tile roofs are direct-nailed or are attached to a deck with batten or batten and counter-batten construction. S-Misson clay and concrete tile roofs, a medium-profile concrete tile roof, and a flat slate tile roof were installed on fully nstrumented attic test assemblies. Temperature measures of the roof, deck, attic, and ceiling, heat flows, solar reflectance, thermal emittance, and the ambient weather were recorded for each of the tile roofs and also on an adjacent attic cavity covered with a conventional pigmented and directnailed asphalt shingle roof. ORNL measured the tile's underside temperature and the bulk air temperature and heat flows just underneath the tile for batten and counter-batten tile systems and compared the results to the conventional asphalt shingle.

Miller, William A [ORNL

2005-11-01

392

A simplified modelling approach for pesticide transport in a tile-drained field: The PESTDRAIN  

E-print Network

A simplified modelling approach for pesticide transport in a tile-drained field: The PESTDRAIN presents a simplified model called PESTDRAIN. It sim- ulates pesticide transport in a subsurface tile-drained field. It com- putes surface runoff and tile-drainage flow rates, along with the asso- ciated pesticide

Boyer, Edmond

393

Conditions of high-speed firing of floor tiles eliminating the formation of blackheart  

Microsoft Academic Search

The heart of the tiles from the investigated bodies after their high-speed firing up to 1100~ had a color differing from the usual for the given body. Depending on the composition of the body, the fired tiles from the Nikolaevskii and Nikiforovskii clays and from the Nikiforovskii--Novoraiskii clays had a black color of the heart, whereas the tiles from the

Yu. P. Kareev; P. I. Berenshtein

1970-01-01

394

Hadron Spectroscopy in COMPASS  

E-print Network

The COmmon Muon and Proton Apparatus for Structure and Spectroscopy (COMPASS) is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron (SPS) aimed at studying the structure and spectrum of hadrons. In the naive Constituent Quark Model (CQM) mesons are bound states of quarks and antiquarks. QCD, however, predict the existence of hadrons beyond the CQM with exotic properties interpreted as excited glue (hybrids) or even pure gluonic bound states (glueballs). One main goal of COMPASS is to search for these states. Particularly interesting are so called spin-exotic mesons which have J^{PC} quantum numbers forbidden for ordinary q\\bar{q} states. Its large acceptance, high resolution, and high-rate capability make the COMPASS experiment an excellent device to study the spectrum of light-quark mesons in diffractive and central production reactions up to masses of about 2.5 GeV. COMPASS is able to measure final states with charged as well as neutral particles, so that resonances can be studied ...

Grube, Boris

2012-01-01

395

Theory of Hadronic Atoms  

E-print Network

A review of the modern theory of hadronic atoms based on the non-relativistic effective Lagrangian approach and ChPT, is given. As an application of the general framework, we consider the decay of the pi+pi- atom into two neutral pions, and the energy-level shift of the pi-p atom. The analysis of the decay width of the pi+pi- atom has been carried out at the first non-leading order in isospin breaking, and at O(e^2p^2) in ChPT, that results in an accurate theoretical prediction for this quantity. The study of the pi-p atom energy-level shift within the same approach clearly demonstrates the necessity to critically reaccess the values of the pi N scattering lengths, extracted from the energy-level shift measurement by means of the potential model-based theoretical analysis. The construction of short-range hadronic potentials from field theory is also discussed.

A. Rusetsky

2000-11-02

396

New hadron spectroscopies  

NASA Astrophysics Data System (ADS)

QCD-motivated models for hadrons predict an assortment of "exotic" hadrons that have structures that are more complex than the quark-antiquark mesons and three-quark baryons of the original quark-parton model. These include pentaquark baryons, the six-quark H-dibaryon, and tetraquark and glueball mesons. Despite extensive experimental searches, no unambiguous candidates for any of these exotic configurations have yet to be identified. On the other hand, a number of meson states, one that seems to be a proton-antiproton bound state, and others that contain either charmed-anticharmed quark pairs or bottom-antibottom quark pairs, have been recently discovered that neither fit into the quark-antiquark meson picture nor match the expected properties of the QCD-inspired exotics. Here I briefly review results from a recent search for the H-dibaryon, and discuss some properties of the newly discovered states -the so-called XYZ mesons- and compare them with expectations for conventional quark-antiquark mesons and the predicted QCD-exotic states.

Olsen, Stephen Lars

2014-04-01

397

A Vision of Hadronic Physics  

E-print Network

We present a vision for the next decade of hadron physics in which the central question being addressed is how one might win new physical insight into the way hadronic systems work. The topics addressed include the relevance of model building, the role of spontaneously broken chiral symmetry, spectroscopy, form factors and physics in the deep inelastic regime.

A. W. Thomas

2014-04-04

398

A Vision of Hadronic Physics  

E-print Network

We present a vision for the next decade of hadron physics in which the central question being addressed is how one might win new physical insight into the way hadronic systems work. The topics addressed include the relevance of model building, the role of spontaneously broken chiral symmetry, spectroscopy, form factors and physics in the deep inelastic regime.

Thomas, A W

2014-01-01

399

Advanced Thin Ionization Calorimeter (ATIC) Balloon Experiment  

NASA Technical Reports Server (NTRS)

During grant NAG5-5064, Louisiana State University (LSU) led the ATIC team in the development, construction, testing, accelerator validation, pre-deployment integration and flight operations of the Advanced Thin Ionization Calorimeter (ATIC) Balloon Experiment. This involved interfacing among the ATIC collaborators (UMD, NRL/MSFC, SU, MSU, WI, SNU) to develop a new balloon payload based upon a fully active calorimeter, a carbon target, a scintillator strip hodoscope and a pixilated silicon solid state detector for a detailed investigation of the very high energy cosmic rays to energies beyond 10(exp 14) eV/nucleus. It is in this very high energy region that theory predicts changes in composition and energy spectra related to the Supernova Remnant Acceleration model for cosmic rays below the "knee" in the all-particle spectrum. This report provides a documentation list, details the anticipated ATIC science return, describes the particle detection principles on which the experiment is based, summarizes the simulation results for the system, describes the validation work at the CERN SPS accelerator and details the balloon flight configuration. The ATIC experiment had a very successful LDB flight from McMurdo, Antarctica in 12/00 - 1/01. The instrument performed well for the entire 15 days. Preliminary data analysis shows acceptable charge resolution and an all-particle power law energy deposition distribution not inconsistent with previous measurements. Detailed analysis is underway and will result in new data on the cosmic ray charge and energy spectra in the GeV - TeV energy range. ATIC is currently being refurbished in anticipation of another LDB flight in the 2002-03 period.

Wefel, John P.; Guzik, T. Gregory

2001-01-01

400

A simplistic view of hadron calorimetry  

SciTech Connect

All too often we rely on Monte Carlo simulations without worrying too much about basic physics. It is possible to start with a very simple calorimeter (a big cylinder) and learn the functional form of {pi}/e by an induction argument. Monte Carlo simulations provide sanity checks and constants. A power-law functional form describes test beam results surprisingly well. The prediction that calorimeters respond differently to protons and pions of the same energy was unexpected. The effect was later demonstrated by the CMS forward calorimeter group, using the most noncompensating calorimeter ever built. Calorimeter resolution is dominated by fluctuations in {pi}0 production and the energy deposit by neutrons. The DREAM collaboration has recently used a dual readout calorimeter to eliminate the first of these. Ultimate resolution depends on measuring neutrons on an event-by-event basis as well.

Groom, Donald E. [50R6008, Lawrence Berkeley National Laboratory, Berkeley CA 94720 (United States)

2007-03-19

401

A design rationale for NASA TileWorld  

NASA Technical Reports Server (NTRS)

Automated systems that can operate in unrestricted real-world domains are still well beyond current computational capabilities. This paper argues that isolating essential problem characteristics found in real-world domains allows for a careful study of how particular control systems operate. By isolating essential problem characteristics and studying their impact on autonomous system performance, we should be able to more quickly deliver systems for practical real-world problems. For our research on planning, scheduling, and control, we have selected three particular domain attributes to study: exogenous events, uncertain action outcome, and metric time. We are not suggesting that studies of these attributes in isolation are sufficient to guarantee the obvious goals of good methodology, brilliant architectures, or first-class results; however, we are suggesting that such isolation facilitates the achievement of these goals. To study these attributes, we have developed the NASA TileWorld. We describe the NASA TileWorld simulator in general terms, present an example NASA TileWorld problem, and discuss some of our motivations and concerns for NASA TileWorld.

Philips, Andrew B.; Swanson, Keith J.; Drummond, Mark E.; Bresina, John L.

1991-01-01

402

Regional languages and tiling: a unifying approach to picture grammars  

E-print Network

with preliminary definitions, and in Sect. 3 with the definition of regional tile grammars and relevant examples to Simplot's [9] interesting closure operation on pictures. The presentation continues in Sect. 2. In Sect. 4 we present the parsing algorithm and prove its correctness and complexity. In Sect. 5 we

Pradella, Matteo

403

Calligraphic Editor for Textile and Tile Pattern Design System  

Microsoft Academic Search

This paper presents a calligraphic editor for tile and textile design. This editor is part of an integrated system for graphic design, and includes also structural edition and retrieval tools to exploit design pattern databases. Draw- ing and some commands for geometrical transformations are specified by means of freehand strokes. Paper describes both user interface and its implementation details. A

José María Gomis; Francisco Albert; Manuel Contero; Ferran Naya

2004-01-01

404

Tritium decontamination of TFTR carbon tiles employing ultra violet light  

NASA Astrophysics Data System (ADS)

Tritium decontamination on the surface of Tokamak Fusion Test Reactor (TFTR) bumper limiter tiles used during the Deuterium-Deuterium (D-D) phase of TFTR operations was investigated employing an ultra violet light source with a mean wavelength of 172 nm and a maximum radiant intensity of 50 mW/ cm2. The partial pressures of H 2, HD, C and CO 2 during the UV exposure were enhanced more than twice, compared to the partial pressures before UV exposure. In comparison, the amount of O 2 decreased during the UV exposure and the production of a small amount of O 3 was observed when the UV light was turned on. Unlike the decontamination method of baking in air or oxygen, the UV exposure removed hydrogen isotopes from the tile to vacuum predominantly in forms of gases of hydrogen isotopes. The tritium surface contamination on the tile in the area exposed to the UV light was reduced after the UV exposure. The results show that the UV light with a wavelength of 172 nm can remove hydrogen isotopes from carbon-based tiles at the very surface.

Shu, W. M.; Ohira, S.; Gentile, C. A.; Oya, Y.; Nakamura, H.; Hayashi, T.; Iwai, Y.; Kawamura, Y.; Konishi, S.; Nishi, M. F.; Young, K. M.

2001-03-01

405

Tiles made from slag sitall based on chemical industry slag  

SciTech Connect

The authors establish the feasibility of obtaining ceramic silicate-based facing tiles from fluoroamphibole slag sitall wastes from the hydropyrolytic production of hydrogen fluoride. The recovered ceramic is tested by x-ray diffraction and electron microscopy for its crystallization behavior, structure, workability, corrosion resistance, phase composition, impact strength, and other properties.

Batalin, B.S.; Moskalets, N.B.; Klyuchnik, I.A.; Golius, T.E.

1987-11-01

406

8 IEEE INTELLIGENT SYSTEMS Sliding-tile puzzles and Rubik's  

E-print Network

8 IEEE INTELLIGENT SYSTEMS Sliding-tile puzzles and Rubik's Cube in AI research Richard E. Korf Ã? 3 Ã? 3 Rubik's Cube (see Figure 1b) also comes in 2 Ã? 2 Ã? 2, 4 Ã? 4 Ã? 4, and 5 Ã? 5 Ã? 5 versions. Both

Buro, Michael

407

Arctic circles, domino tilings and square Young tableaux  

E-print Network

The arctic circle theorem of Jockusch, Propp, and Shor asserts that uniformly random domino tilings of an Aztec diamond of high order are frozen with asymptotically high probability outside the "arctic circle" inscribed within the diamond. A similar arctic circle phenomenon has been observed in the limiting behavior of random square Young tableaux. In this paper, we show that random domino tilings of the Aztec diamond are asymptotically related to random square Young tableaux in a more refined sense that looks also at the behavior inside the arctic circle. This is done by giving a new derivation of the limiting shape of the height function of a random domino tiling of the Aztec diamond that uses the large-deviation techniques developed for the square Young tableaux problem in a previous paper by Pittel and the author. The solution of the variational problem that arises for domino tilings is almost identical to the solution for the case of square Young tableaux by Pittel and the author. The analytic techniques...

Romik, Dan

2009-01-01

408

Arctic circles, domino tilings and square Young tableaux  

E-print Network

Arctic circles, domino tilings and square Young tableaux Dan Romik Department of Mathematics, UC Davis October 23, 2010 (Revised version) Abstract The arctic circle theorem of Jockusch, Propp, and Shor with asymptotically high probability outside the "arctic cir- cle" inscribed within the diamond. A similar arctic

Romik, Dan

409

REACTOR CANAL AFTER IT HAS BEEN TILED. WATER FILLS CANAL ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

REACTOR CANAL AFTER IT HAS BEEN TILED. WATER FILLS CANAL PART WAY TO TOP. CAMERA FACES WEST. INL NEGATIVE NO. 3993-A. Unknown Photographer, 12/28/1951 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

410

EVALUATION OF FUNGAL GROWTH (PENICILLIUM GLABRUM) ON A CEILING TILE  

EPA Science Inventory

The paper gives results of a study employing static chambers to study the impact of different equilibrium relative humidities (RHs) and moisture conditions on the ability of a new ceiling tile to support fungal growth. mplification of the mold, Penicillium glabrum, occurred at RH...

411

EVALUATION OF FUNGAL GROWTH (PENICILLIUM GLABRUM) ON A CEILING TILE  

EPA Science Inventory

The paper gives results of a study employing static chambers to study the impact of different equilibrium relative humidities (RHs) and moisture conditions on the ability of a new ceiling tile to support fungal growth. Amplification of the mold, Penicillium glabrum, occurred at R...

412

Quartz Plate Calorimetry for CMS HE Upgrade  

E-print Network

Analysis of the CMS data and the simulation prediction based on these results indicate that the performance of the current scintillators in the CMS Hadron Endcap Calorimeter (HE) tiles will degrade dramatically in the High Luminosity LHC (HL-LHC) era. In order to continue the physics program in this region, the HE tiles will need to be replaced. The new tiles should have comparable/improved performance, be radiation hard, reliable and robust.

Yasar Onel; David Winn

2013-08-29

413

Quartz Plate Calorimetry for CMS HE Upgrade  

E-print Network

Analysis of the CMS data and the simulation prediction based on these results indicate that the performance of the current scintillators in the CMS Hadron Endcap Calorimeter (HE) tiles will degrade dramatically in the High Luminosity LHC (HL-LHC) era. In order to continue the physics program in this region, the HE tiles will need to be replaced. The new tiles should have comparable/improved performance, be radiation hard, reliable and robust.

Onel, Yasar

2013-01-01

414

Realtime calibration of the A4 electromagnetic lead fluoride calorimeter  

E-print Network

Sufficient energy resolution is the key issue for the calorimetry in particle and nuclear physics. The calorimeter of the A4 parity violation experiment at MAMI is a segmented calorimeter where the energy of an event is determined by summing the signals of neighbouring channels. In this case the precise matching of the individual modules is crucial to obtain a good energy resolution. We have developped a calibration procedure for our total absorbing electromagnetic calorimeter which consists of 1022 lead fluoride (PbF_2) crystals. This procedure reconstructs the the single-module contributions to the events by solving a linear system of equations, involving the inversion of a 1022 x 1022-matrix. The system has shown its functionality at beam energies between 300 and 1500 MeV and represents a new and fast method to keep the calorimeter permanently in a well-calibrated state.

Baunack, S; Capozza, L; Diefenbach, J; Frascaria, R; Gläser, B; Harrach, D v; Imai, Y; Kothe, R; Kunne, R; Lee, J H; Maas, F E; Espí, M C Mora; Morlet, M; Ong, S; Schilling, E; van de Wiele, J; Weinrich, C

2011-01-01

415

Realtime calibration of the A4 electromagnetic lead fluoride calorimeter  

E-print Network

Sufficient energy resolution is the key issue for the calorimetry in particle and nuclear physics. The calorimeter of the A4 parity violation experiment at MAMI is a segmented calorimeter where the energy of an event is determined by summing the signals of neighbouring channels. In this case the precise matching of the individual modules is crucial to obtain a good energy resolution. We have developped a calibration procedure for our total absorbing electromagnetic calorimeter which consists of 1022 lead fluoride (PbF_2) crystals. This procedure reconstructs the the single-module contributions to the events by solving a linear system of equations, involving the inversion of a 1022 x 1022-matrix. The system has shown its functionality at beam energies between 300 and 1500 MeV and represents a new and fast method to keep the calorimeter permanently in a well-calibrated state.

S. Baunack; D. Balaguer Ríos; L. Capozza; J. Diefenbach; R. Frascaria; B. Gläser; D. v. Harrach; Y. Imai; R. Kothe; R. Kunne; J. H. Lee; F. E. Maas; M. C. Mora Espí; M. Morlet; S. Ong; E. Schilling; J. van de Wiele; C. Weinrich

2011-02-28

416

Experimental studies of di-jets in Au + Au collisions using angular correlations with respect to back-to-back leading hadrons  

NASA Astrophysics Data System (ADS)

Jet-medium interactions are studied via a multihadron correlation technique (called “2+1”), where a pair of back-to-back hadron triggers with large transverse momentum is used as a proxy for a di-jet. This work extends the previous analysis for nearly symmetric trigger pairs with the highest momentum threshold of trigger hadron of 5 GeV/c with the new calorimeter-based triggers with energy thresholds of up to 10 GeV and above. The distributions of associated hadrons are studied in terms of correlation shapes and per-trigger yields on each trigger side. In contrast with di-hadron correlation results with single triggers, the associated hadron distributions for back-to-back triggers from central Au+Au data at sNN=200 GeV show no strong modifications compared to d+Au data at the same energy. An imbalance in the total transverse momentum between hadrons attributed to the near-side and away-side of jetlike peaks is observed. The relative imbalance in the Au+Au measurement with respect to d+Au reference is found to increase with the asymmetry of the trigger pair, consistent with the expectation from medium-induced energy-loss effects. In addition, this relative total transverse momentum imbalance is found to decrease for softer associated hadrons. Such evolution indicates that the energy missing at higher associated momenta is converted into softer hadrons.

Adamczyk, L.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alakhverdyants, A. V.; Alekseev, I.; Alford, J.; Anson, C. D.; Arkhipkin, D.; Aschenauer, E.; Averichev, G. S.; Balewski, J.; Banerjee, A.; Barnovska, Z.; Beavis, D. R.; Bellwied, R.; Betancourt, M. J.; Betts, R. R.; Bhasin, A.; Bhati, A. K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Borowski, W.; Bouchet, J.; Brandin, A. V.; Brovko, S. G.; Bruna, E.; Bültmann, S.; Bunzarov, I.; Burton, T. P.; Butterworth, J.; Cai, X. Z.; Caines, H.; Calderón de la Barca Sánchez, M.; Cebra, D.; Cendejas, R.; Cervantes, M. C.; Chaloupka, P.; Chang, Z.; Chattopadhyay, S.; Chen, H. F.; Chen, J. H.; Chen, J. Y.; Chen, L.; Cheng, J.; Cherney, M.; Chikanian, A.; Christie, W.; Chung, P.; Chwastowski, J.; Codrington, M. J. M.; Corliss, R.; Cramer, J. G.; Crawford, H. J.; Cui, X.; Das, S.; Davila Leyva, A.; De Silva, L. C.; Debbe, R. R.; Dedovich, T. G.; Deng, J.; Derradi de Souza, R.; Dhamija, S.; Didenko, L.; Ding, F.; Dion, A.; Djawotho, P.; Dong, X.; Drachenberg, J. L.; Draper, J. E.; Du, C. M.; Dunkelberger, L. E.; Dunlop, J. C.; Efimov, L. G.; Elnimr, M.; Engelage, J.; Eppley, G.; Eun, L.; Evdokimov, O.; Fatemi, R.; Fazio, S.; Fedorisin, J.; Fersch, R. G.; Filip, P.; Finch, E.; Fisyak, Y.; Gagliardi, C. A.; Gangadharan, D. R.; Geurts, F.; Gibson, A.; Gliske, S.; Gorbunov, Y. N.; Grebenyuk, O. G.; Grosnick, D.; Gupta, S.; Guryn, W.; Haag, B.; Hajkova, O.; Hamed, A.; Han, L.-X.; Harris, J. W.; Hays-Wehle, J. P.; Heppelmann, S.; Hirsch, A.; Hoffmann, G. W.; Hofman, D. J.; Horvat, S.; Huang, B.; Huang, H. Z.; Huck, P.; Humanic, T. J.; Huo, L.; Igo, G.; Jacobs, W. W.; Jena, C.; Judd, E. G.; Kabana, S.; Kang, K.; Kapitan, J.; Kauder, K.; Ke, H. W.; Keane, D.; Kechechyan, A.; Kesich, A.; Kikola, D. P.; Kiryluk, J.; Kisel, I.; Kisiel, A.; Kizka, V.; Klein, S. R.; Koetke, D. D.; Kollegger, T.; Konzer, J.; Koralt, I.; Koroleva, L.; Korsch, W.; Kotchenda, L.; Kravtsov, P.; Krueger, K.; Kulakov, I.; Kumar, L.; Lamont, M. A. C.; Landgraf, J. M.; LaPointe, S.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, J. H.; Leight, W.; LeVine, M. J.; Li, C.; Li, L.; Li, W.; Li, X.; Li, X.; Li, Y.; Li, Z. M.; Lima, L. M.; Lisa, M. A.; Liu, F.; Ljubicic, T.; Llope, W. J.; Longacre, R. S.; Lu, Y.; Luo, X.; Luszczak, A.; Ma, G. L.; Ma, Y. G.; Madagodagettige Don, D. M. M. D.; Mahapatra, D. P.; Majka, R.; Mall, O. I.; Margetis, S.; Markert, C.; Masui, H.; Matis, H. S.; McDonald, D.; McShane, T. S.; Mioduszewski, S.; Mitrovski, M. K.; Mohammed, Y.; Mohanty, B.; Mondal, M. M.; Morozov, B.; Munhoz, M. G.; Mustafa, M. K.; Naglis, M.; Nandi, B. K.; Nasim, Md.; Nayak, T. K.; Nelson, J. M.; Nogach, L. V.; Novak, J.; Odyniec, G.; Ogawa, A.; Oh, K.; Ohlson, A.; Okorokov, V.; Oldag, E. W.; Oliveira, R. A. N.; Olson, D.; Ostrowski, P.; Pachr, M.; Page, B. S.; Pal, S. K.; Pan, Y. X.; Pandit, Y.; Panebratsev, Y.; Pawlak, T.; Pawlik, B.; Pei, H.; Perkins, C.; Peryt, W.; Pile, P.; Planinic, M.; Pluta, J.; Plyku, D.; Poljak, N.; Porter, J.; Poskanzer, A. M.; Powell, C. B.; Pruneau, C.; Pruthi, N. K.; Przybycien, M.; Pujahari, P. R.; Putschke, J.; Qiu, H.; Raniwala, R.; Raniwala, S.; Ray, R. L.; Redwine, R.; Reed, R.; Riley, C. K.; Ritter, H. G.; Roberts, J. B.; Rogachevskiy, O. V.; Romero, J. L.; Ross, J. F.; Ruan, L.; Rusnak, J.; Sahoo, N. R.; Sahu, P. K.; Sakrejda, I.; Salur, S.; Sandacz, A.; Sandweiss, J.; Sangaline, E.; Sarkar, A.; Schambach, J.; Scharenberg, R. P.; Schmah, A. M.; Schmidke, B.; Schmitz, N.; Schuster, T. R.; Seele, J.; Seger, J.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shao, M.; Sharma, B.; Sharma, M.; Shi, S. S.; Shou, Q. Y.; Sichtermann, E. P.; Singaraju, R. N.; Skoby, M. J.; Smirnov, D.; Smirnov, N.; Solanki, D.; Sorensen, P.; deSouza, U. G.; Spinka, H. M.; Srivastava, B.; Stanislaus, T. D. S.; Steadman, S. G.; Stevens, J. R.; Stock, R.; Strikhanov, M.; Stringfellow, B.; Suaide, A. A. P.; Suarez, M. C.; Sumbera, M.; Sun, X. M.; Sun, Y.; Sun, Z.; Surrow, B.; Svirida, D. N.; Symons, T. J. M.; Szanto de Toledo, A.; Takahashi, J.; Tang, A. H.; Tang, Z.; Tarini, L. H.; Tarnowsky, T.; Thein, D.; Thomas, J. H.; Tian, J.; Timmins, A. R.; Tlusty, D.; Tokarev, M.; Trentalange, S.; Tribble, R. E.; Tribedy, P.; Trzeciak, B. A.; Tsai, O. D.; Turnau, J.; Ullrich, T.; Underwood, D. G.; Van Buren, G.; van Nieuwenhuizen, G.; Vanfossen, J. A., Jr.; Varma, R.; Vasconcelos, G. M. S.; Videbæk, F.; Viyogi, Y. P.; Vokal, S.; Voloshin, S. A.; Vossen, A.; Wada, M.; Wang, F.; Wang, G.; Wang, H.; Wang, J. S.; Wang, Q.; Wang, X. L.; Wang, Y.; Webb, G.; Webb, J. C.; Westfall, G. D.; Whitten, C., Jr.; Wieman, H.; Wissink, S. W.; Witt, R.; Witzke, W.; Wu, Y. F.; Xiao, Z.; Xie, W.; Xin, K.; Xu, H.; Xu, N.; Xu, Q. H.; Xu, W.; Xu, Y.; Xu, Z.; Xue, L.; Yang, Y.; Yang, Y.; Yepes, P.; Yi, Y.; Yip, K.

2013-04-01

417

Signal feedthroughs for the ATLAS barrel and endcap calorimeters  

SciTech Connect

The function, design, construction, testing, and installation of the signal feedthroughs for the barrel and endcap ATLAS liquid argon calorimeters are described. The feedthroughs provide a high density and radiation hard method to extract over 200 000 signals from the cryogenic environment of the calorimeters using an application of a design based on flexible kapton circuit board transmission lines. A model to describe the frequency dependent behavior of the transmission lines is also presented.

Axen, D.; Hackenburg, R.; Hoffmann, A.; Kane, S.; Lissauer, D.; Makowiecki, D.; Muller, T.; Pate, D.; Radeka, V.; Rahm, D.; Rehak, M.; Rescia, S.; Sexton, K.; Sondericker, J.; Birney, P.; Dowling, A.W.; Fincke-Keeler, M.; Hodges, T.; Holness, F.; Honkanen, N. [Department of Physics, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 (Canada); Brookhaven National Laboratory, Upton, New York 11973-5000 (United States); Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, V8W 3P6 (Canada); TRIUMF, Vancouver, British Columbia, V6T 2A3 (Canada)] [and others

2005-06-15

418

Simulations of a thin sampling calorimeter with GEANT\\/FLUKA  

Microsoft Academic Search

The Advanced Cosmic-ray Composition Experiment for the Space Station (ACCESS) will investigate the origin, composition and acceleration mechanism of cosmic rays by measuring the elemental composition of the cosmic rays up to 1015eV. These measurements will be made with a thin ionization calorimeter and a transition radiation detector. This paper reports studies of a thin sampling calorimeter concept for the

Jeongin Lee; John Watts; Leonard Howell

2001-01-01

419

Plastic scintillator bar with WLS fiber calorimeter for neutrino physics  

NASA Astrophysics Data System (ADS)

A calorimeter with 180 plastic scintillator bars interleaved with 180 iron bars has been built and tested with pion and electron beams at CERN. The plastic scintillator bars, coupled to wavelength shifting fibers, are read with multi-anode PMTs and Amplitude-Time-Pattern self-triggering digitizing electronics. This type of calorimeter could be well suited for the construction of large, many kton detectors for neutrino oscillation experiments on the CERN to Gran Sasso CNGS beam or for the neutrino factory.

Giannini, Gianrossano; Santin, Giovanni; Spinetti, Mario; Votano, Lucia; Hoepfner, Kerstin

2001-04-01

420

Hadron production experiments  

NASA Astrophysics Data System (ADS)

The HARP and NA61/SHINE hadroproduction experiments as well as their implications for neutrino physics are discussed. HARP measurements have already been used for predictions of neutrino beams in K2K and MiniBooNE/SciBooNE experiments and are also being used to improve the atmospheric neutrino flux predictions and to help in the optimization of neutrino factory and super-beam designs. First measurements released recently by the NA61/SHINE experiment are of significant importance for a precise prediction of the J-PARC neutrino beam used for the T2K experiment. Both HARP and NA61/SHINE experiments provide also a large amount of input for validation and tuning of hadron production models in Monte-Carlo generators.

Popov, Boris A.

2013-02-01

421

Hadrons as holograms  

E-print Network

We review our recent work on four topics in strong-interaction physics from the perspective of the gauge/gravity correspondence. In particular, we discuss (i) the construction of the ``metric soft wall'' dual for holographic QCD which reproduces the observed linear square-mass trajectories of radially and orbitally excited (light-quark) hadrons, (ii) an extension of the metric soft wall which encodes diquark correlations holographically and additionally leads to an excellent description of the empirical nucleon excitation spectrum, (iii) an AdS/QCD dual that emerges as a new solution of 5d Einstein-dilaton gravity with a specifically derived potential and realizes the area law of the Wilson loop and (approximately) linear meson trajectories dynamically, and finally (iv) the calculation of glueball correlation functions and decay constants in both the hard- and dilaton soft-wall gravity duals, as well as a quantitative analysis of their QCD-relevant physics content.

Hilmar Forkel

2009-10-30

422

Hadrons as holograms  

E-print Network

We review our recent work on four topics in strong-interaction physics from the perspective of the gauge/gravity correspondence. In particular, we discuss (i) the construction of the "metric soft wall" dual for holographic QCD which reproduces the observed linear square-mass trajectories of radially and orbitally excited (light-quark) hadrons, (ii) an extension of the metric soft wall which additionally encodes light diquark correlations holographically and leads to an excellent description of the empirical nucleon excitation spectrum as well, (iii) an AdS/QCD dual which emerges as a new solution of 5d Einstein-dilaton gravity with a specifically derived potential and realizes the area law of the Wilson loop and (approximately) linear meson trajectories dynamically, and finally (iv) the calculation of glueball correlation functions and decay constants in both the hard- and dilaton soft wall gravity duals, as well as a detailed and quantitative analysis of their QCD-relevant physics content.

Forkel, Hilmar

2009-01-01

423

Measurement of top quark mass in the all hadronic channel in s**(1/2) = 1.96 TeF, ppbar collisions at D0  

SciTech Connect

A measurement of the top quark mass in proton-antiproton collisions at {radical}s = 1.96 TeV using 1040fb{sup -1} of data collected in D detector at Fermilab is presented. This analysis focuses on the all-hadronic decay mode of the top quark and therefore only events with six or more calorimeter jets in the final state are considered.

Lam, David Wai Kui; /Notre Dame U.

2008-05-01

424

Hydrogen isotopes retention in the outboard first wall tiles of JT-60U  

NASA Astrophysics Data System (ADS)

We have investigated hydrogen isotopes retention in graphite tiles used as outboard first wall armors of JT-60U by means of SEM, TDS and SIMS. The SEM examination confirmed that these tiles are mostly eroded. Different from graphite divertor tiles, in which H retention was dominant owing to isotopic replacement during HH discharges preformed after DD discharges to remove tritium, deuterium is dominated in hydrogen isotopes retention of the outboard first wall tiles showing deeper penetration. This is attributed to the injection of high energy D and less isotopic replacement due to the lower temperature of the outboard first wall tiles. This type of hydrogen retention could not be avoided for the metallic wall. Although the amount of hydrogen isotopes retained per unit area in the outboard first wall tiles was much less than that for the divertor tiles, the integrated retention over the whole first wall surface could be very large.

Yoshida, M.; Tanabe, T.; Nobuta, Y.; Hayashi, T.; Masaki, K.; Sato, M.

2009-06-01

425

Tiled convolutional neural networks Quoc V. Le, Jiquan Ngiam, Zhenghao Chen, Daniel Chia, Pang Wei Koh, Andrew Y. Ng  

E-print Network

Tiled convolutional neural networks Quoc V. Le, Jiquan Ngiam, Zhenghao Chen, Daniel Chia, Pang Wei,jngiam,zhenghao,danchia,pangwei,ang}@cs.stanford.edu Abstract Convolutional neural networks (CNNs) have been successfully applied to many tasks such as digit propose tiled convolution neural networks (Tiled CNNs), which use a regular "tiled" pattern of tied

Ng, Andrew Y.

426

HARP: a hadron production experiment  

E-print Network

Hadron production is a key ingredient in many aspects of neutrino physics. Precise prediction of atmospheric neutrino fluxes, characterization of accelerator neutrino beams, quantification of pion production and capture for neutrino factory designs, all of these would profit of high-statistics, high-precision hadron production measurements. In addition, such data is needed for the calibration of Monte-Carlo hadron production models. The HARP experiment at CERN is performing extensive measurements of cross sections and secondary particle yields to address these problems.

Emilio Radicioni

2002-06-12

427

Hadron collider physics at UCR  

SciTech Connect

This paper describes the research work in high energy physics by the group at the University of California, Riverside. Work has been divided between hadron collider physics and e{sup +}-e{sup {minus}} collider physics, and theoretical work. The hadron effort has been heavily involved in the startup activities of the D-Zero detector, commissioning and ongoing redesign. The lepton collider work has included work on TPC/2{gamma} at PEP and the OPAL detector at LEP, as well as efforts on hadron machines.

Kernan, A.; Shen, B.C.

1997-07-01

428

Heavy quarks in hadronic collisions  

SciTech Connect

It is suggested that the presence of c anti c-pairs on the 1 to 2% level in the hadron Fock state decomposition (intrinsic charm) gives a natural description of the ISR data for charm hadron production. The theoretical foundations of the intrinsic charm hypothesis together with its consequences for lepton- and hadron-induced reactions are discussed in some detail. There is no contradiction with the EMC data on F/sub 2//sup c/ provided the appropriate threshold dependence is taken into account.

Brodsky, S.J.; Peterson, C.

1982-03-01

429

Upgrade of the Trigger Readout System of the ATLAS Liquid Argon Calorimeters  

NASA Astrophysics Data System (ADS)

The ATLAS detector was designed and built to study proton-proton collisions produced at the LHC at centre-of-mass energies up to 14 TeV and instantaneous luminosities up to 1034cm-2s-1. Liquid argon (LAr) sampling calorimeters are employed for all electromagnetic calorimetry in the pseudorapidity region |?| <3.2, and for hadronic calorimetry in the region from |?| =1.5 to |?| =4.9. The ATLAS LAr calorimeters produce a total of 182,486 signals which are digitized and processed by the front-end and back-end electronics at every triggered event. In addition, the front-end electronics sums analog signals to provide coarsely grained energy sums to the Level-1 trigger system, which is optimized for nominal LHC luminosities. In 2018, an instantaneous luminosity of 2-3 ×1034cm-2s-1 is expected, far beyond the nominal one for which the detector was designed. In order to cope with this increased trigger rate, an improved spatial granularity of the trigger primitives is proposed to improve the identification performance for trigger signatures, like electrons, photons, tau leptons, jets, total and missing energy, at high background rejection rates. For these purposes, a new LAr Trigger Digitizer Board (LTDB) is being designed to receive higher granularity signals, digitize them on detector and send them via fast optical links to a new LAr digital processing system (LDPS). The LDPS applies a digital filtering and identifies significant energy depositions in each trigger channel. The refined trigger primitives are then transmitted to the Level-1 trigger system to extract improved trigger signatures.

Marino, C. P.

2014-06-01

430

ATLAS Liquid Argon Endcap Calorimeter R&D for sLHC  

NASA Astrophysics Data System (ADS)

The performance of the ATLAS liquid argon endcap has been studied for luminosities as expected for the operation at sLHC. The increase of integrated luminosity by a factor of ten has serious consequences for the signal reconstruction, radiation hardness requirements and operations of the forward liquid argon calorimeters. The response has been studied with small modules of the type as built for ATLAS in a very high intensity beam at IHEP/Protvino. The highest intensity obtained was well above the level of energy impact expected for ATLAS at sLHC. The signal processing of the ATLAS Hadronic Endcap Calorimeter employs the concept of 'active pads' which keep the detector capacities at the input of the amplifiers small and thereby achieves a fast rise time of the signal. This concept is realized using highly integrated amplifier and summing chips in GaAs technology. With an increase of luminosity by a factor of ten the safety factor for the radiation hardness is essentially eliminated. Therefore new, more radiation hard technologies have been studied: SiGe bipolar, Si CMOS FET and GaAs FET transistors have been irradiated with neutrons up to an integrated fluence of 2.2 × 1016n/cm2. All technologies exceed the limit required for the radiation hardness for the operation at sLHC of 2 × 1015n/cm2. The temperature dependence of the gain has been studied as well. Here the bipolar technologies - in contrast to CMOS - need an adjustment of the operation point when going from room temperature to liquid nitrogen temperature.

Schacht, P.

2010-04-01

431

Hadron Polarizabilities and Quark Models.  

National Technical Information Service (NTIS)

An estimate is given of the electric and magnetic polarizabilities of hadrons, namely nucleons and pi (K) mesons, in the framework of the most widespread accepted quark model. (Atomindex citation 09:369275)

G. Dattoli, G. Matone, D. Prosperi

1977-01-01

432

Hadronic structure from the lattice  

E-print Network

In recent years the investigation of hadron structure using lattice techniques has attracted growing attention. In this talk we give an overview on recent work with a focus on results for nucleon spectrum and structure from the QCDSF collaboration.

Dirk Brommel; Meinulf Gockeler; Philipp Hagler; Roger Horsley; Yoshifumi Nakamura; Munehisa Ohtani; Dirk Pleiter; Paul E. L. Rakow; Andreas Schafer; Gerrit Schierholz; Wolfram Schroers; Hinnerk Stuben; James M. Zanotti

2008-04-29

433

Hierarchical Trigger of the ALICE Calorimeters  

SciTech Connect

The trigger of the ALICE electromagnetic calorimeters is implemented in 2 hierarchically connected layers of electronics. In the lower layer, level-0 algorithms search shower energy above threshold in locally confined Trigger Region Units (TRU). The top layer is implemented as a single, global trigger unit that receives the trigger data from all TRUs as input to the level-1 algorithm. This architecture was first developed for the PHOS high p{sub T} photon trigger before it was adopted by EMCal also for the jet trigger. TRU units digitize up to 112 analogue input signals from the Front End Electronics (FEE) and concentrate their digital stream in a single FPGA. A charge and time summing algorithm is combined with a peakfinder that suppresses spurious noise and is precise to single LHC bunches. With a peak-to-peak noise level of 150 MeV the linear dynamic range above threshold spans from MIP energies at 215 up to 50 GeV. Local level-0 decisions take less than 600 ns after LHC collisions, upon which all TRUs transfer their level-0 trigger data to the upstream global trigger module which searches within the remaining level-1 latency for high p{sub T} gamma showers (PHOS) and/or for Jet cone areas (EMCaL).

Muller, Hans [CERN, Geneva, Switzerland; Awes, Terry C [ORNL

2010-05-01

434

SUITABILITY OF A NEW CALORIMETER FOR EXOTIC MESON SEARCHES  

SciTech Connect

Exotic mesons, particles that have quantum numbers that are inaccessible to conventional quark-model mesons, are predicted by quantum chromodynamics (QCD), but past experiments seeking to identify exotic candidates have produced controversial results. The HyCLAS experiment (E04005) at Thomas Jefferson National Accelerator Facility (TJNAF) proposes the use of the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) in Hall B to study the photoproduction of exotic mesons. However, the base detector package at CLAS is not ideal for observing and measuring neutral particles, particularly at forward angles. The Deeply Virtual Compton Scattering (DVCS) experiment at TJNAF has commissioned a new calorimeter for detecting small-angle photons, but studies must be performed to determine its suitability for a meson spectroscopy experiment. The ?? system has been under especial scrutiny in the community as a source for potential exotics, so the new calorimeter’s ability at reconstructing these resonances must be evaluated. To achieve this, the invariant mass of showers in the calorimeter are reconstructed. Also, two electroproduction reaction channels analogous to photoproduction channels of interest to HyCLAS are examined in DVCS data. It is found that, while not ideal, the new calorimeter will allow access to additional reaction channels, and its inclusion in HyCLAS is warranted. Results in basic shower reconstruction show that the calorimeter has good effi ciency in resolving ?° decays, but its ? reconstruction is not as strong. When examining ep ? ep?°?, preliminary reconstruction of the ??° system shows faint signals in the a0(980) region. In the ep ? e n ?+ ? channel, preliminary reconstruction of the ??+ system gave good signals in the a0(980) and a2(1320) regions, but statistics were poor. While more analyses are necessary to improve statistics and remove background, these preliminary results support the claim that the DVCS calorimeter will be a valuable addition to CLAS for upcoming exotic meson searches in photoproduction.

Bookwalter, C.; Ostrovidov, A.; Eugenio, P.

2007-01-01

435

Late effects from hadron therapy  

SciTech Connect

Successful cancer patient survival and local tumor control from hadron radiotherapy warrant a discussion of potential secondary late effects from the radiation. The study of late-appearing clinical effects from particle beams of protons, carbon, or heavier ions is a relatively new field with few data. However, new clinical information is available from pioneer hadron radiotherapy programs in the USA, Japan, Germany and Switzerland. This paper will review available data on late tissue effects from particle radiation exposures, and discuss its importance to the future of hadron therapy. Potential late radiation effects are associated with irradiated normal tissue volumes at risk that in many cases can be reduced with hadron therapy. However, normal tissues present within hadron treatment volumes can demonstrate enhanced responses compared to conventional modes of therapy. Late endpoints of concern include induction of secondary cancers, cataract, fibrosis, neurodegeneration, vascular damage, and immunological, endocrine and hereditary effects. Low-dose tissue effects at tumor margins need further study, and there is need for more acute molecular studies underlying late effects of hadron therapy.

Blakely, Eleanor A.; Chang, Polly Y.

2004-06-01

436

Large-scale testing of structural clay tile infilled frames  

SciTech Connect

A summary of large-scale cyclic static tests of structural clay tile infilled frames is given. In-plane racking tests examined the effects of var