The different accelerator types (linear, circular) and the advantages of using superconductivity in particle accelerator are first reviewed. Characteristics of some large superconducting accelerators (Tevatron, HERA, RHIC, LHC CERN) are presented. The des...
National Technical Information Service (NTIS)
The Grand Accelerateur National d'Ions Lourds (GANIL) of CAEN, France accelerates ions from C to U in the energy range from 100 MeV/amu to 10 MeV/amu. The Centre Interdisciplinaire de Recherches avec les Ions Lourds (CIRIL) is in charge of the non nuclear...
An electromagnetic valve used to isolate the target area of an accelerator from the rest of the machine when air is entering the target chamber is described. The valve, used in the Van de Graaff machines and cyclotron of Saclay since 1957, offers quasi-instantaneous self-closing under the effects of the vacuum. (D.C.W.)
Energy Citations Database
Some studies on nonlinear effects in betatron oscillations of particles circulating in accelerators were accomplished in connection with the construction of the CERN proton synchrotron. In the course of the studies it was judged advantageous to construct model to electromechanically simulate these oscillations. A description of the construction of the device and the ...
The magnetic field topography is considered, in cylindrical coordinates, for the case of radial sector accelerators having an azimuthal periodicity and radial field index, both of them with random values. The solutions for the case where the index is a function of the radius are defined using a recurrence formula. In the case where the index is constant, these ...
A bibliographic study is being made on transportable particle accelerators used as neution sources. In the first report of this bibliographic stucly, the applications of such accelerators to qualitative and quantitative analysis are considered. As an introduction, the interactions of neutrons with matter are desciibed. Then, the transmission of ...
Contribution to the study of traveling-wave-type plasma accelerators contribution a l'etude des accelerateurs de plasma a ondes progressives ...
NASA Website
Mar 1, 2011 ... Title: Contribution to the study of traveling-wave-type plasma accelerators contribution a l'etude des accelerateurs de plasma a ondes ...
The author presents the main mathematical tools used in electronics and in particular in accelerator electronics: complex functions, distributions, Fourier series, Laplace transformation, Fourier transformation and probabilities. (ERA citation 17:031438)
The Grand Accelerateur National D'Ions Lourds. (GAKIL) is located in Caan, France [29]. A cyclotron is used to accelerate heavy ions up to 50 MeVIamu. ...
Drill-hole logging methods that utilize radioactivity are classified and examined. The methods studied are based on: detection of natural radioactivity (gamma logging); scattering of the GAMMA rays from a radioactive source (gammagamma logging); thermalization of neutrons from a fastneutron source (neutron logging); detection of capture gamma rays produced in nuclear reactions ...
S.A.R.A. ''Systeme Accelerateur Rhone-Alpes'' is a two stage accelerator now running at the Grenoble Institut des Sciences Nucleaires (I.S.N.). It is a Heavy Ion Accelerator giving beams from Li to Ar at a maximum energy of 40 MeV/amu.
An analytical and numerical approach for improving the dynamical aperture of a given circular accelerator facility is presented. In circular accelerators, powerful nonlinear lenses (hexapoles) are used, in order to balance the optic structure natural chro...
The paper contains a digest of a series of studies on the frequency modulation of U.H.F. fields and signals associated with the linear electron accelerator at Saclay. First considered is the frequency modulation of a U.H.F. pulse before its injection into...
A study was conducted to examine different possible designs for an ion source and accelerator assembly, suitable for operating in space. Such an assembly could serve to treat products in space such as the surfaces of space structures eroded by micrometeor...
The magnetic moment, ?, of an electron in a h.f. plasma accelerator is evaluated in the case of negligeable axial acceleration in the resonance region (large injection velocity). D�tache au CEA Saclay par EURATOM.
NASA Astrophysics Data System (ADS)
Various theories of bremsstrahlung radiation are critically compared. Experimental data on the production of gamma radiation by relativistic electron beams are compared to the theoretical results, in order to estimate the validity of the various theories. (auth)
The new accelerator facility GANIL at Caen is devoted to heavy-ion physics in the intermediate-energy range 20-100 MeV/A. Due to the construction principle, a compact injector cyclotron followed by two ''identical'' isochronous sector cyclotrons coupled t...
to accelerating partic- les with the beam intensities up to 10% of the initial beam intensity. By lengthening. Consequently, negative partic- les travelling with protons together inside the bunch shall be accelerated. So1056 ACCELERATOR AND INSTRUMENTATION PROSPECTS OF ELEMENTARY PARTICLE ...
E-print Network
The transport of three simultaneous beams in the 1 km-length linear accelerator (linac) has been studied, from the beam recombination stage at the linac entry, to their dispersion, at the end of the linac: effects of the injection energy, the FODO mesh le...
Les reactions de transfert de deux nucleons ^7Li/^6Li(^3He, rm p)^8Be/^9Be ont ete effectuees a partir d'um faisceau d'^3He initialement polarise et d'energie incidente egale a 4.58 MeV au centre de la cible. Le faisceau d'^3He est simplement ionise et il est accelere par l'accelerateur Van de Graaff de l'Universite Laval. Ce faisceau ...
The fatigue-related behavior of a linear elastic system (LES) can be efficiently identified using acceleration response if the frequency response function between the acceleration input and the stress response (FRFas) can be predetermined. In this paper, the spectral damage of an LES is predicted using energy ...
Clinical applications of hadron beams have generated a wide development of radiobiology experiments, especially at GANIL (Grand Accelerateur National d'Ions Lourds), an ion accelerator in Caen. Biological samples are irradiated with ions in order to observe the induced biological effects. As these observations have to be related to the fluence ...
The determination of parameters influencing the quality of the beam and its control was studied. Two areas have received special emphasis: the problems of beam focusing which condition the stability of the accelerator and the problems connected to the convenient determination of the magnetic field. In the first part, the beam focusing in the ...
To assess the capacity of heavy ions to induce apoptosis in lymphocytes, mice have been irradiated with accelerated carbon ions (95 MeV/nucleon) at doses ranging from 0.1 to 4 Gy. Their spleens were removed 24 h later and gently dissociated to prepare a single cell suspension. Mononuclear cells were then maintained in culture at 37 degrees C, and the occurrence of apoptosis in ...
PubMed
The ALTO facility (Accelerateur Lineaire et Tandem d'Orsay) at Institut de Physique Nucleaire d'Orsay is under commissioning. The main aim of this facility is to provide neutron rich isotope beams for both nuclear physics studies (away from the valley of stability) and developments dedicated to next generation facilities such as SPIRAL2 (Systeme de Production ...
Heavy Ion Microbeam- and Broadbeam-Induced Transients in SiGe HBTs ... sources at the Grand Accelerateur National d'Ions Lourds and the University of . ...
Jul 5, 2007 ... Heavy Ion Microbeam- and Broadbeam-Induced Current Transients in SiGe ... sources at the Grand Accelerateur National d'Ions Lourds and the ...
Heavy Ion Testing at the Galactic Cosmic Ray Energy Peak ... broadbeam sources at the Grand Accelerateur National d'Ions Lourds and the University of . ...
and acceleration noises Reduction of the influence of vibration noise (common mode rejection) K Rb 2 atomic21/10/09 Workshop GPhyS, Les Houches Atom interferometry in microgravity: the ICE project G. Stern1 Houches The ICE project: testing the UFF with a two-species atom interferometer in microgravity The idea
The VIVITRON is a new 35 MV particle accelerator which presents a great number of innovations. One of the major problem is the beam transport in this electrostatic machine of 50 m length for ions with masses between 1 and 200. Our work consisted in the st...
... is needed for the effective administration of the corporate income tax. The method calls for adding back ... the economy, such as accelerated depreciation under the corporate income tax.REFERENCESCramton,...
NBII National Biological Information Infrastructure
... De r~cents essais mends sur des bottes ont permis de conclure qu'aucun soldat n'aime avoir les pieds mouill~s ni porter des articles chaussants ...
DTIC Science & Technology
The usefulness of particle beams for radiation therapy has been well and widely recognized. For the cure of cancer patients, many accelerator facilities have already been utilized, and some new facilities are now being put into operation, or are under construction. Considering the medical and biological requirements, light heavy ions with an energy of several hundred ...
We present a statistical analysis of the relationship between the kinematics of the leading edge and the eruptive prominence in coronal mass ejections (CMEs). We study the acceleration phase of 18 CMEs in which kinematics was measured from the pre-eruption stage up to the post-acceleration phase. In all CMEs, the three part structure (the leading edge, the ...
of the method, and a coarse time step, introduced to maximize speedup (maximal gain in time) or to optimally use, division of Intensive Scientific Computing and Numerical Simulations), PITAC (Parall�elisation Incluant le Temps pour Acc�el�erer les Calculs - Parallelization including time in order to accelerate scientific
Les pegmatites du Maniema et du Rwanda et les roches de transition entre les aplites et les pegmatites du Maniema
Language: French ...
Polarized Electron Source workshops have been held at varying intervals, beginning in 1983 when Charles Sinclair convened the first at SLAC. Since that time, three workshops were held in conjunction with the International Spin Symposia and two at other occasions. The increasing importance of polarized electron beams at accelerators has stimulated interest in these workshops. ...
DOE Information Bridge
A study was made of the magnetic field tolerances allowable in the separated sector cyclotrons (Cyclotron a Secteurs Separees or CSS) at GANIL (Grand Accelerateur National a Ions Lourdes). The presentation includes: a theoretical review; SSC characteristi...
A new isotopic separation method is presented. It permits studies of radioactive atomic nuclei produced in high energy heavy ions collisions. Two experiments were performed at the GANIL facilities (Grand Accelerateur National d'Ions Lourds, Caen). They ar...
A study was made of the magnetic field tolerances allowable in the separated sector cyclotrons (Cyclotron a Secteurs Separees or CSS) at GANIL (Grand Accelerateur National a Ions Lourdes). The presentation includes: the study conditions; static and dynami...
An experimental study of the interaction of highly charged, energetic ions (52 MeV (58)Ni(13+) and 15.7 MeV (16)O(5+)) with mixed H(2)O?:?C(18)O(2) astrophysical ice analogs at two different temperatures is presented. This analysis aims to simulate the chemical and the physicochemical interactions induced by cosmic rays inside dense, cold astrophysical environments, such as molecular clouds or ...
The presence of carbonic acid (H2 CO3 ), hydrogen peroxide (H2 O2 ) and ozone (O3 ) is a direct evidence of radiation processing of frozen surfaces in astrophysical environments. These species have been observed at several frozen moons of giant planets (e.g. Europa, Ganymede, Rhea, Dione). Carbonic acid has been observed at Calisto and its presence on Mars surface has been suggested. This acid is ...
Ammonia-containing ices have been detected or postulated as important components of the icy surfaces of planetary satellites (e.g. Enceladus, Miranda), in the outer Solar System objects (e.g. Charon, Quaoar) and in Oort cloud comets. We present experimental studies of the interaction of heavy, highly-charged, and energetic ions with ammonia-containing ices (pure NH3 ; NH3 :CO; NH3 :H2 O and NH3 ...
The presence of large unsaturated carbon chain species, such as polyacetylenes, cyanopolyes and PAHs, in interstellar regions has been detected in the last 30 years. During the years, several mechanism have been proposed to explain the presence of these compounds in space including, gas-phase ion-molecule reactions and neutral-neutral reactions. Although no direct detection of large saturated ...
... LES) to wall-bounded turbu- lent flows has be ... LES modeling is applied to a turbulent channel flow. Ideal LES is an LES evolution that is guaranteed ...
... Stockage � stockage de la nourriture: Donc, les entrepôts, les installations de conservation à froid, les silos de stockage, les gouvernes de grain, les ...
Center for Food Safety and Applied Nutrition (CFSAN)
Les blazars de type Lacertide sont des noyaux actifs de galaxies possedant un jet relativiste de matiere dirige vers la Terre. L'emis- sion de ce jet, amplifiee par effet Doppler, domine celle de l'objet central sur un large domaine en energie, avec des variations parfois tres courtes dans le repere de l'observateur. Les resultats d'observation par C.A.T. ...
[...]SCOLE (beam+antenna) introduced by the engineers of NASA. We considered the case where the acceleration term [...]poutre+antenne) introduit par les ing�nieurs de la NASA. Nous avons consid�r� le cas o� le terme [...
Recent nuclear industry briefs are presented. These briefs include: Japan to build to nuclear power plants; RWE buys Degussa`s interest in Nukem; Soviet-East German Uranium Project restructured; Chinon A3 shut down; Italy to close last two nuclear units; Rio Algom buys into Uranium Resources; Duke to sell partial interest in LES; and China to accelerate ...
Plans for the RHIC Spin Physics Program June 2, 2008 (Draft) Abstract This report gives a RHIC spin for beyond 2013. Writers, for the RHIC Spin Collaboration Gerry Bunce (chair), Alexander Bazilevsky, Les Vogelsang, Feng Yuan #12;Contents 1 Executive Summary 2 2 RHIC Accelerator, Polarimetry, and Experiments 4 2
Multigrid on Merrimac Eric Darve Vidya Rangasayee Frank Ham #12;streamLES � Multigrid: one of the key.g. combustion source terms and their effect on momentum). � So far: Poisson is accelerated using Multigrid faster for Poisson solve, Overall 4x speedup Multigrid works! Comparison of PCG and AMG #12;PCG 2-level
Two lasers with wavelengths of 1.053 and 1.064 micrometers, respectively, are used to generate intense electric fields in a plasma in order to accelerate charged particles. A long homogeneous plasma at least 5 mm in length is needed in order to diagnose t...
Cette these doctorale porte sur l'organisation des rivieres a lit de graviers. La formation du lit en sequences a grande echelle---les sequences seuil-mouille---est une caracteristique de ces rivieres qui controle la stabilite et la productivite ecologique. Malgre son importance, le mecanisme qui genere les seuil-mouilles reste obscur. Ce probleme est lie ...
... les �tablissements de fast food et les h�pitaux, les maternit�s, ou les cr�ches et garderies; et, par analogie, les refuges pour animaux, les chenils ...
L'integration de composants discrets sur un systeme unique, tel une puce electronique, augmente les performances totales du systeme, fait apparaitre de nouvelles fonctionnalites et diminue les couts associes a la fabrication des dispositifs. Ces ameliorations, appliquees au secteur de la microelectronique, sont grandement responsables des avancements ...
... Title : ANTENNA SYSTEM FOR LES-5. ... Abstract : The antenna system for Lincoln Laboratory's fifth experimental satellite (LES-5) is described. ...
Nous presentons dans cette these des modeles d'evolution stellaire incorporant la diffusion microscopique de maniere consistante. Pour la premiere fois, on a calcule l'evolution d'etoiles en tenant compte en detail de l'impact des variations d'abondances sur leur structure. Nous utilisons des spectres monochromatiques pour chacun des elements les plus abondants dans un melange ...
