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1
Application of ILC superconducting cavities for acceleration of protons
2007-10-01

Beam acceleration in the International Linear Collider (ILC) will be provided by 9-cell 1300 MHz superconducting (SC) cavities. The cavities are designed for effective acceleration of charged particles moving with the speed of light and are operated on {pi}-mode to provide maximum accelerating gradient. Significant ...

DOE Information Bridge

2
Argonne physicists achieve landmark accelerator gradient
2011-08-06

International Linear Collider (ILC) as nearing the ceiling for an accelerator's physical size. "Right now, high-energy physicists are building accelerators that are...

Science.gov Websites

3
ILC Global Control System.
2007-01-01

The scale and performance parameters of the ILC require new thinking in regards to control system design. This design work has begun quite early in comparison to most accelerator projects, with the goal of uniquely high overall accelerator availability. A...

National Technical Information Service (NTIS)

4
RF kick in the ILC acceleration structure
2008-06-01

Detailed results of estimations and simulations for the RF kick caused by input and HOM couplers of the ILC acceleration structure are presented. Results of possible beam emittance dilution caused by RF kick are discussed for the main LINAC acceleration structure, and the RF structures of the ILC bunch compressors ...

Energy Citations Database

5
Application of International Linear Collider superconducting cavities for acceleration of protons
2007-12-01

Beam acceleration in the International Linear Collider (ILC) will be provided by 9-cell 1300 MHz superconducting (SC) cavities. The cavities are designed for effective acceleration of charged particles moving with the speed of light and are operated on ?-mode to provide a maximum accelerating gradient. A ...

NASA Astrophysics Data System (ADS)

6
Availability and Reliability Issues for ILC
2007-06-27

The International Linear Collider (ILC) will be the largest most complicated accelerator ever built. For this reason extensive work is being done early in the design phase to ensure that it will be reliable enough. This includes gathering failure mode data from existing accelerators and simulating the failures and repair times of the ...

Energy Citations Database

7
Dark current model for ILC main linac
2008-06-01

In the ILC Main Linac, the dark current electrons, generated in SRF cavity can be accelerated to hundreds of MeV before being kicked out by quadrupoles and thus will originate electromagnetic cascade showers in the surrounding materials. Some of the shower secondaries can return back into vacuum and be re-accelerated again. The ...

DOE Information Bridge

8
Power Coupler for the ILC Crab Cavity.
2007-01-01

The ILC crab cavity will require the design of an appropriate power coupler. The beam-loading in dipole-mode cavities is considerably more variable than accelerating cavities, hence simulations have been performed to establish the required external Q. Sim...

National Technical Information Service (NTIS)

9
Physics at ILC and Role of Polarized Beams
2007-06-13

International Linear Collider, ILC, is a future energy-frontier electron-positron machine currently under design by a world-wide collaboration. Utilizing the advantage of linear accelerator, a polarized electron beam plays an essential role for various key physics studies. In addition to the default operation-mode, options are proposed such as polarized ...

Energy Citations Database

10
R&D of Accelerator Structures at SLAC
2007-01-17

The research activities for accelerator structures at SLAC are reviewed including the achievement via the main linac design for the Next Linear Collider (NLC), the program adjustment after the decision of the International Linear Collider (ILC) to be based on superconducting technology, and the work progress for the ILC, photon science ...

DOE Information Bridge

11
Proceedings of the 2005 International Linear Collider Physics and Detector Workshop and 2nd ILC Accelerator Workshop (Snowmass 2005)
2006-06-21

For two weeks in August of 2005, 668 physicists gathered in the Rocky Mountains of Colorado to study the physics, the detectors and the accelerator of the International Linear Collider. For the first time, a fully international physics and detector workshop was held in conjunction with the ILC Accelerator workshop.

Energy Citations Database

12
Wakefield and RF Kicks Due to Coupler Asymmetry in TESLA-Type Accelerating Cavities.
2008-01-01

In a future linear collider, such as the International Linear Collider (ILC), trains of high current, low emittance bunches will be accelerated in a linac before colliding at the interaction point. Asymmetries in the accelerating cavities of the linac wil...

National Technical Information Service (NTIS)

13
Progress Towards of a Superconducting Traveling Wave Accelerating Structure.
2006-01-01

In the ILC project the required accelerating gradient is higher than 30 MeV/m. For current technology the maximum acceleration gradient in SC structures is determined mainly by the value of the surface RF magnetic field. In order to increase the gradient,...

National Technical Information Service (NTIS)

14
Proposal of the Next Incarnation of Accelerator Test Facility at KEK for the International Linear Collider
2005-05-27

To reach design luminosity, the International Linear Collider (ILC) must be able to create and reliably maintain nanometer size beams. The ATF damping ring is the unique facility where ILC emittances are possible. In this paper we present and evaluate the proposal to create a final focus facility at the ATF which, using compact final focus optics and an ...

DOE Information Bridge

15
Fermilab Steering Group Report
2007-01-01

The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ...

DOE Information Bridge

16
Fermilab Steering Group Report
2007-12-01

The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ...

DOE Information Bridge

17
Transverse wake field simulations for the ILC acceleration structure
2008-06-01

Details of wake potential simulation in the acceleration structure of ILC, including the RF cavities and input/HOM couplers are presented. Transverse wake potential dependence is described versus the bunch length. Beam emittance dilution caused by main and HOM couplers is estimated, followed by a discussion of possible structural modifications allowing a ...

Energy Citations Database

18
Characterization and Comparison of Control Units for Piezo Actuators to be used for Lorentz Force Compensation in the ILC.
2010-01-01

Superconducting accelerators, such as the International Linear Collider (ILC), rely on very high Q accelerating cavities to achieve high electric fields at low RF power. Such cavities have very narrow resonances: a few kHz with a 1.3GHz resonance frequenc...

National Technical Information Service (NTIS)

19
International Linear Collider
2008-07-01

The International Linear Collider (ILC) is a proposed electron-positron collider that will explore the Terascale. The ILC can be characterized as a precision machine that will study the discoveries made at the Large Hadron Collider (LHC), at CERN. These two giant machines are highly complementary. The concept of Electro-weak symmetry breaking and the Higgs ...

NASA Astrophysics Data System (ADS)

20
R&D of Accelerator Structures at SLAC.
2006-01-01

The research activities for accelerator structures at SLAC are reviewed including the achievement via the main linac design for the Next Linear Collider (NLC), the program adjustment after the decision of the International Linear Collider (ILC) to be base...

National Technical Information Service (NTIS)

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21
Particle Physics and Astrophysics : SLAC National Accelerator...
2011-02-14

Xenon Observatory (EXO) FGST JDEM Laser Acceleration (E163) LCD/SiD @ ILC LSST Plasma Wakefield (E157/E162/E164) Theory Theoretical Physics Website Archive Computing PPA...

Science.gov Websites

22
Enabling Technologies for Petascale Electromagnetic Accelerator Simulation.
2007-01-01

The SciDAC2 accelerator project at SLAC aims to simulate an entire three-cryomodule radio frequency (RF) unit of the International Linear Collider (ILC) main Linac. Petascale computing resources supported by advances in Applied Mathematics (AM) and Comput...

National Technical Information Service (NTIS)

23
Ilc Cryogenic Systems Reference Design
2008-03-01

A Global Design Effort (GDE) began in 2005 to study a TeV scale electron-positron linear accelerator based on superconducting radio-frequency (RF) technology, called the International Linear Collider (ILC). In early 2007, the design effort culminated in a reference design for the ILC, closely based on the earlier TESLA design. The ...

NASA Astrophysics Data System (ADS)

24
ILC cryogenic systems reference design
2008-01-01

A Global Design Effort (GDE) began in 2005 to study a TeV scale electron-positron linear accelerator based on superconducting radio-frequency (RF) technology, called the International Linear Collider (ILC). In early 2007, the design effort culminated in a reference design for the ILC, closely based on the earlier TESLA design. The ...

Energy Citations Database

25
Analysis of DESY-Flash LLRF Measurements for the ILC Heavy Beam Loading Test
2009-06-01

In September 2008 the DESY-FLASH accelerator was run with up to 550, 3 nano-coulomb bunches at 5 Hz repetition rate. This test is part of a longer-term study aimed at validating ILC parameters by operation as close as possible to ILC beam currents and RF gradients. The present paper reports on the analysis that has been done in order ...

Energy Citations Database

26
Conceptual design of an L-band recirculating superconducting traveling wave accelerating structure for ILC
2007-06-01

With this paper, we propose the conceptual design of a traveling wave accelerating structure for a superconducting accelerator. The overall goal is to study a traveling wave (TW) superconducting (SC) accelerating structure for ILC that allows an increased accelerating gradient and, therefore ...

DOE Information Bridge

27
Characterization and Comparison of Control Units for Piezo Actuators to be used for Lorentz Force Compensation inth ILC
2010-01-01

Superconducting accelerators, such as the International Linear Collider (ILC), rely on very high Q accelerating cavities to achieve high electric fields at low RF power. Such cavities have very narrow resonances: a few kHz with a 1.3GHz resonance frequency for the ILC. Several mechanical factors cause tune shifts ...

DOE Information Bridge

28
Plans for a 750 MeV electron beam test facility at Fermilab
2007-06-01

A 750 MeV electron beam test facility at Fermilab is in the planning and early construction phase. An existing building is being converted for this facility. The photoinjector currently in use at the Fermilab NICADD Photoinjector Laboratory (FNPL) will be moved to the new facility and upgraded to serve as an injector for a beam acceleration section consisting of three TTF or ...

Energy Citations Database

29
Power coupler for the ILC crab cavity
2007-06-01

The ILC crab cavity will require the design of an appropriate power coupler. The beam-loading in dipole mode cavities is considerably more variable than accelerating cavities, hence simulations have been performed to establish the required external Q. Simulations of a suitable coupler were then performed and were verified using a normal conducting ...

Energy Citations Database

30
Final Results on RF and Wake Kicks Caused by the Couplers for the ILC Cavity
2010-05-01

In the paper the results are presented for calculation of the transverse wake and RF kick from the power and HOM couplers of the ILC acceleration structure. The RF kick was calculated stand-alone by HFSS, CST MWS and COMSOL codes while the wake kick was calculated by GdfidL. The calculation precision and convergence for both cases are discussed and ...

Energy Citations Database

31
Diagnostics of FEL and ILC ultrashort electron bunches based on undulator and synchrotron radiation
2010-12-01

The diagnostics of ultrashort electron bunches developed basing on undulator and synchrotron radiation in the framework of the JINR-DESY collaboration is designated for the International Linear Collider (ILC) project, as well as for Free Electron Lasers (FELs) such as the FLASH and X ray XFEL laser. All these accelerator complexes require diagnostics of ...

NASA Astrophysics Data System (ADS)

32
Capture cavity II results at FNAL
2007-06-01

As part of the research and development towards the International Linear Collider (ILC), several test facilities have been developed at Fermilab. This paper presents the latest Low Level RF (LLRF) results obtained with Capture Cavity II (CCII) at the ILC Test Accelerator (ILCTA) test facility. The main focus will be on controls and RF ...

Energy Citations Database

33
Enabling Technologies for Petascale Electromagnetic Accelerator Simulation
2007-11-09

The SciDAC2 accelerator project at SLAC aims to simulate an entire three-cryomodule radio frequency (RF) unit of the International Linear Collider (ILC) main Linac. Petascale computing resources supported by advances in Applied Mathematics (AM) and Computer Science (CS) and INCITE Program are essential to enable such very large-scale electromagnetic ...

Energy Citations Database

34
An Over-moded Fundamental Power Coupler for the ILC
2009-05-20

The current design of fundamental power couplers for the ILC are expensive and require excessively long conditioning times. The goal of this develoment is design of a coupler that requires little rf processing and is significantly less expensive to build than the present ILC coupler.����� The goal of this program is development of a new ...

Energy Citations Database

35
An Over-moded Fundamental Power Coupler for the ILC
2009-05-20

The current design of fundamental power couplers for the ILC are expensive and require excessively long conditioning times. The goal of this develoment is design of a coupler that requires little rf processing and is significantly less expensive to build than the present ILC coupler. The goal of this program is development of a new technology for ...

DOE Information Bridge

36
Beam Instrumentation Challenges at the International Linear Collider
2006-05-16

The International Linear Collider (ILC) is a proposed facility for the study of high energy physics through electron-positron collisions at center-of-mass energies up to 500 GeV and luminosities up to 2 x 10{sup 34} cm{sup -2} sec{sup -1}. Meeting the ILC's goals will require an extremely sophisticated suite of beam instruments for the ...

Energy Citations Database

37
Final Report for "Modeling Electron Cloud Diagnostics for High-Intensity Proton Accelerators"
2009-09-25

Electron clouds in accelerators such as the ILC degrade beam quality and limit operating efficiency. The need to mitigate electron clouds has a direct impact on the design and operation of these accelerators, translating into increased cost and reduced performance. Diagnostic techniques for measuring electron clouds in ...

DOE Information Bridge

38
Intrabeam Scattering Studies for the ILC Damping Rings Using a New Matlab Code.
2006-01-01

A new code to calculate the effects of intrabeam scattering (IBS) has been developed in MATLAB based on the approximation suggested by K. Bane. It interfaces with the Accelerator Toolbox but can also read in lattice functions from other codes. The code ha...

National Technical Information Service (NTIS)

39
International Linear Collider Beam Dumps.
2006-01-01

The ILC beam dumps are a key part of the accelerator design. At Snowmass 2005, the current status of the beam dump designs was reviewed, and the options for the overall dump layout considered. This paper describes the available dump options for the baseli...

National Technical Information Service (NTIS)

40
High Power Polarized Positron Source
2009-09-02

We discuss the basics of polarized positron production by low energy polarized electrons. Efficiency of conversion approx0.1-1% might be interesting for the Continuous Electron Beam Accelerator Facility (CEBAF) and the International Linear Collider (ILC).

Energy Citations Database

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41
Fermilab Steering Group Report.
2007-01-01

The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity acceler...

National Technical Information Service (NTIS)

42
Characterization of an Electromagnetic Calorimeter for the Proposed International Linear Collider
2006-09-11

The International Linear Collider (ILC) is part of a new generation of accelerators enabling physicists to gain a deeper understanding of the fundamental components of the universe. The proposed ILC will accelerate positrons and electrons towards each other with two facing linear colliders, each twenty kilometers ...

DOE Information Bridge

43
Beam Dynamics Challenges for the ILC
2008-02-13

The International Linear Collider (ILC) is a proposal for 500 GeV center-of-mass electron-positron collider, with a possible upgrade to {approx}1 TeV center-of-mass. At the heart of the ILC are the two {approx}12 km 1.3 GHz superconducting RF (SCRF) linacs which will accelerate the electron and positron beams to an initial maximum ...

DOE Information Bridge

44
Performance of a 1.3 GHZ Nornaml-Conducting 5-Cell Standing-Wave Cavity
2008-11-12

A 5-cell, normal-conducting, 1.3 GHz, standing-wave (SW) cavity was built as a prototype capture accelerator for the ILC positron source. Although the ILC uses predominantly superconducting cavities, the capture cavity location in both a high radiation environment and a solenoidal magnetic field requires it to be normal conducting. ...

Energy Citations Database

45
Radiation requirements and testing of cryogenic thermometers for the ILC
2007-07-01

Large quantity of cryogenic temperature sensors will be used for operation of the International Linear Collider (ILC). Most of them will be subject to high radiation doses during the accelerator lifetime. Understanding of particle energy spectra, accumulated radiation dose in thermometers and its impact on performance are vital in establishing technical ...

DOE Information Bridge

46
Measuring the Magnetic Center Behavior of an ILC Superconducting Quadrupole Prototype
2011-02-07

The main linacs of the proposed International Linear Collider (ILC) consist of superconducting cavities operated at 2K. The accelerating cavities are contained in a contiguous series of cryogenic modules that also house the main linac quadrupoles, thus the quadrupoles also need to be superconducting. In an early ILC design, these ...

Energy Citations Database

47
ILC Electron Source Injector Simuations
2007-08-29

As part of the global project aimed at proposing an efficient design for the ILC (International Linear Collider), we simulated possible setups for the electron source injector, which will provide insight into how the electron injector for the ILC should be designed in order to efficiently accelerate the electron beams through the ...

DOE Information Bridge

48
Studies of Room Temperature Accelerator Structures for the ILC Positron Source
2006-03-15

There are many challenges in the design of the normal-conducting portion of the ILC positron injector system such as achieving adequate cooling with the high RF and particle loss heating, and sustaining high accelerator gradients during millisecond-long pulses in a strong magnetic field. The proposed design for the positron injector contains both ...

Energy Citations Database

49
Studies for Cesr-TA: A low-emittance test accelerator at the Cornell Electron Storage Ring
2008-01-01

The International Linear Collider (ILC) is a proposed facility for studying collisions of electrons and positrons at 500 GeV (center of mass). The quality of the ILC's results will depend on its ability to reach the specified luminosity of 2 x 1032 cm-2/s. Damping rings provide the required low-emittance beams, but the specifications for the ...

NASA Astrophysics Data System (ADS)

50
Positron Injector Accelerator and RF System for the ILC
2007-03-28

Due to the extremely high energy deposition from positrons, electrons, photons and neutrons behind the positron target, and because a solenoid is required to focus the large emittance positron beam, the 1.3 GHz preaccelerator has to use normal conducting structures up to energy of 400 MeV. There are many challenges in the design of the normal-conducting portion of the ILC ...

Energy Citations Database

51
Road map for studies to produce consistent and high performance SRF accelerator structures
2008-05-01

Superconducting Radio Frequency (SRF) accelerator structures made from high purity niobium are becoming the technological choice for a large number of future accelerators and energy recovery LINAC's (ERL). Most of the presently planned accelerators and ERL requirements will be met with some effort by the current SRF technology where ...

NASA Astrophysics Data System (ADS)

52
Road Map for Studies to Produce Consistent and High Performance SRF Accelerator Structures
2007-06-20

Superconducting Radio Frequency (SRF) accelerator structures made from high purity niobium are becoming the technological choice for a large number of future accelerators and energy recovery LINAC�s (ERL). Most of the presently planned accelerators and ERL requirements will be met with some effort by the current SRF technology where ...

DOE Information Bridge

53
The ILC Marx Modulator Development Program at SLAC
2005-06-07

The International Linear Collider [ILC] baseline design requires 576 L-band klystron stations, each supplying 10MW peak RF power to the accelerating structures. Each klystron requires a modulator capable of delivering 120kV, 140A 1.6ms pulses, at 5Hz. Solid-state Marx modulator topologies are rapidly becoming feasible with the advent of PC-board-level ...

DOE Information Bridge

54
High Availability Instrumentation Packaging Standards for the ILC and Detectors
2006-11-30

ILC designers are exploring new packaging standards for Accelerator Controls and Instrumentation, particularly high-speed serial interconnect systems for intelligent instruments versus the existing parallel backplanes of VME, VXI and CAMAC. The High Availability Advanced Telecom Computing Architecture (ATCA) system is a new industrial open standard ...

Energy Citations Database

55
Emittance Dilution due to Dipole Mode Rotating and Coupling in the Main Linacs of the ILC
2005-05-25

The progress of multiple bunches of charged particles down the main L-band linacs of the ILC (International Linear Collider) can be disrupted by wakefields. These wakefields correspond to the electromagnetic fields excited in the accelerating cavities and have both long-range and short-range components. The horizontal and vertical modal components of the ...

DOE Information Bridge

56
An optimized superferric wiggler design for the International Linear Collider damping rings
2007-01-01

Experimental and simulation-based analyses of the superferric wigglers operating in the Cornell Electron Storage Ring (CESR) have provided significant practical experience with a wiggler-dominated accelerator. A modified version of the CESR wiggler will be discussed and shown to meet all physics performance specifications for the International Linear Collider ...

NASA Astrophysics Data System (ADS)

57
High Energy Photon Beam Generation For QCD Explorer Based ?P Colliders
2007-04-01

Combination of two linear accelerator projects, namely CLIC (Compact Linear Collider) and ILC (International Linear Collider) with LHC(Large Hadron Collider) offer an opportunity to build ?p collider. High energy photons are produced by the Compton backscattering of the laser photons off high energy electrons at the conversion region. Then, Compton ...

NASA Astrophysics Data System (ADS)

58
Design of the Second-Generation ILC Marx Modulator
2010-09-14

SLAC National Accelerator Laboratory (SLAC) has initiated a program to design and build a Marx-topology modulator to produce a relatively compact, low-cost, high availability klystron modulator for the International Linear Collider (ILC). Building upon the success of the P1 Marx, the SLAC P2 Marx is a second-generation modulator whose design further ...

Energy Citations Database

59
Controls, LLRF, and instrumentation systems for ILC test facilities at Fermilab
2007-06-01

The major controls and instrumentation systems for the ILC test areas and the NML test accelerator at Fermilab are discussed. The test areas include 3 separate areas for Vertical Superconducting RF Cavity Testing, Horizontal Cavity Testing, and NML RF and beam test area. A common control infrastructure for the test areas including a controls framework, ...

DOE Information Bridge

60
Beam Emittance Measurement with Laser Wire Scanners in the ILC Beam Delivery System
2008-02-01

Accurate measurement of the beam phase-space is essential for the next generation of electron accelerators. A scheme for beam optics optimization and beam matrix reconstruction algorithms for the diagnostics section of the beam delivery system of the International Linear Collider based on laser-wire beam profile monitors are discussed. Possible modes of operation of the ...

DOE Information Bridge

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61
Polarimeters and Energy Spectrometers for the ILC Beam Delivery System
2009-02-24

This article gives an overview of current plans and issues for polarimeters and energy spectrometers in the Beam Delivery System of the ILC. It is meant to serve as a useful reference for the Detector Letter of Intent documents currently being prepared. Concepts for high precision polarization and energy measurements exist. These concepts have resulted in detailed system ...

Energy Citations Database

62
Improved input and output couplers for SC acceleration structure
2009-04-01

Different couplers are described that allow the reduction of both transverse wake potential and RF kick in the SC acceleration structure of ILC. A simple rotation of the couplers reducing the RF kick and transverse wake kick is discussed for both the main linac and bunch compressors, along with possible limitations of this method. Designs of a coupler unit ...

DOE Information Bridge

63
83Accelerators and Related Technologies At LASA, as a matter of fact, both test of RF superconductive (SC) cavities and SC cables

of studies on materials and cryogenic test of cavities, that make the group a key component of the ILC of the LHC accelerator (CERN) main dipole and many NbTi and Nb3Sn solenoids for laboratory use. In the last in strong collaboration with industrial partners as ETH and Zanon. The high magnetic field laboratory group

E-print Network

64
Wakefield Effects in the Beam Delivery System of the ILC
2007-06-27

The main linac of the International Linear Collider (ILC) accelerates short, high peak current bunches into the Beam Delivery System (BDS) on the way to the interaction point. In the BDS wakefields, excited by the resistance of the beam pipe walls and by beam pipe transitions, will tend to degrade the emittance of the beam bunches. In this report we ...

Energy Citations Database

65
Diagnoctics development at JINR for ILC and FEL ultrashort electron bunches
2010-01-01

Different methods for diagnostics of ultrashort electron bunches are developed at JINR-DESY collaboration within the framework of the FLASH and XFEL projects and JINR participation in the ILC project. The main peculiarity of these accelerator complexes is related to formation of ultrashort electron bunches with r.m.s. length 20-300 ?m. Novel diagnostics is ...

NASA Astrophysics Data System (ADS)

66
Converter-Modulator Design and Operations for the ILC L-band Test Stand
2007-09-10

To facilitate a rapid response to the International Linear Collider (ILC) L-band development program at SLAC, a spare converter-modulator was shipped from LANL. This modulator was to be a spare for the spallation neutron source (SNS) accelerator at ORNL. The ILC application requires a 33% higher peak output power (15 MW) and output ...

Energy Citations Database

67
A Project to Design and Build the Magnets for a New Test Beamline, the ATF2, at KEK
2011-02-07

In order to achieve the high luminosity required at the proposed International Linear Collider (ILC), it is critical to focus the beams to nanometer size with the ILC Beam Delivery System, and to maintain the beams collisions with a nanometer-scale stability. To establish the technologies associated with this ultra-high precision beam handling, a special ...

DOE Information Bridge

68
Wakefield and RF Kicks Due to Coupler Asymmetry in TESLA-Type Accelerating Cavities
2008-07-07

In a future linear collider, such as the International Linear Collider (ILC), trains of high current, low emittance bunches will be accelerated in a linac before colliding at the interaction point. Asymmetries in the accelerating cavities of the linac will generate fields that will kick the beam transversely and degrade the beam ...

Energy Citations Database

69
Positron emulator for commissioning ILC positron source.
2005-01-01

The gamma-ray based positron source [1] is an attractive option for the International Linear Collider (ILC) positron option because of the less stringent target requirement and the possibility to provide polarization. The drawback is the fact that the positron accelerator system including positron linac and damping ring can not be fully commissioned until ...

Energy Citations Database

70
NR activity in the accelerating cavities development and study for ILC positron source parameters
2008-12-01

The critical part of the normal conducting (NC) positron preaccelerator (PPA) at the ILC positron source (PS) are capture sections that should operate with an accelerating gradient of up to 15 MV/m in combination with long RF pulse (�1 ms). Developed at the Institute of Nuclear Research (INR) and now being constructed at DESY, the CDS booster cavity for ...

NASA Astrophysics Data System (ADS)

71
A facility for accelerator research and education at Fermilab
2009-01-01

Fermilab is currently constructing the 'SRF Test Accelerator at the New Muon Lab' (NML). NML consists of a photo-emitted RF electron gun, followed by a bunch compressor, low energy test beamlines, SCRF accelerating structures, and high energy test beamlines. The initial primary purpose of NML will be to test superconducting RF ...

DOE Information Bridge

72
ILC NewsLine - 6 January 2011 - Feature 1
2011-03-24

ILC NewsLine PDFs For Printing Archive Search ILC Home Subscribe Contact 6 January 2011 Wei Gai leads positron source efforts for ILC Scientists at the ILC who deal in matters...

Science.gov Websites

73
Production and test results of SC 3.9-GHz accelerating cavity at Fermilab
2006-08-01

The 3rd harmonic 3.9GHz accelerating cavity was proposed to improve beam performances for TTF-FEL facility. In the frame of collaboration Fermilab will provide DESY with a cryomodule containing a string of four cavities. In addition, a second cryomodule with one cavity will be fabricated for installation in the Fermilab photo-injector, which will be upgraded for the ...

Energy Citations Database

74
A Variable Directional Coupler for an Alternate ILC High-Power RF Distribution Scheme
2007-03-16

We describe the design and functionality of an RF directional coupler for which the power division between the output ports is mechanically variable. In an alternate power distribution scheme for the ILC, power is delivered to cavities in pairs, through hybrids. Four pairs, or eight cavities, are fed from one waveguide feed, from which one fourth, one third, and one half of ...

DOE Information Bridge

75
ILC Reference Design Report: Accelerator Executive Summary
2007-12-14

The International Linear Collider (ILC) is a 200-500 GeV center-of-mass high-luminosity linear electron-positron collider, based on 1.3 GHz superconducting radiofrequency (SCRF) accelerating cavities. The use of the SCRF technology was recommended by the International Technology Recommendation Panel (ITRP) in August 2004 [1], and shortly thereafter ...

DOE Information Bridge

76
Work supported in part by Department of Energy contract DE�AC02�76SF00515. Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309

on a program to test the very demanding beam delivery requirements for the ILC. In addition, this project has . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 ATF2 Project, 2005 #12;viii CONTENTS 3.3.3 Beam Size at IP, black =nominal beam. Vertically: green = error beam, blue = corrected beam, black = nominal beam

E-print Network

77
Work supported in part by Department of Energy contract DE-AC02-76SF00515 PROPOSAL OF THE NEXT INCARNATION OF ACCELERATOR TEST

. Kumada, NIRS, Chiba-shi, S. Danagoulian, S. Mtingwa, North Carolina A&T State University, N. Delerue, D facility where ILC emittances are possible. In this paper we present and evaluate the proposal to create the input beam emittances. The difference was attributed to significant jitter of the fo- cused beam

E-print Network

78
Shielding Studies for Superconducting RF Cavities at Fermilab
2010-07-20

A semi-empirical method that allows us to predict intensity of generated field emission in superconducting RF cavities is described. Spatial, angular and energy distributions of the generated radiation are calculated with the FISHPACT code. The Monte Carlo code MARS15 is used for modeling the radiation transport in matter. A comparison with dose rate measurements performed in the Fermilab Vertical ...

Energy Citations Database

79
Processing and Breakdown Localization Results For an L-Band Standing-Wave Cavity.
2009-01-01

An L-band (1.3 GHz), normal-conducting, 5-cell, standing-wave cavity that was built as a prototype capture accelerator for the ILC is being high-power processed at SLAC. The goal is to demonstrate stable operation at 15 MV/m with 1 msec, 5 Hz pulses and t...

National Technical Information Service (NTIS)

80
Kansas Advanced Semiconductor Project
2007-09-21

KASP (Kansas Advanced Semiconductor Project) completed the new Layer 0 upgrade for D0, assumed key electronics projects for the US CMS project, finished important new physics measurements with the D0 experiment at Fermilab, made substantial contributions to detector studies for the proposed e+e- international linear collider (ILC), and advanced key initiatives in ...

DOE Information Bridge

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81
June 18, 2008 CBN 08-5 LITHIUM LENS FOR POSITRON PRODUCTION SYSTEM*

in the nearby accelerating structure and elements of collection optics itself. Utilization of Lithium lensJune 18, 2008 CBN 08-5 LITHIUM LENS FOR POSITRON PRODUCTION SYSTEM* A.Mikhailichenko# , Cornell positron production scheme for ILC-type machine. In particular we describe details of Lithium lens design

E-print Network

82
Evidence for Non-Linear BCS Resistance in SRF Cavities.
2005-01-01

Very powerful RF cavities are now being developed for future large-scale particle accelerators such as the International Linear Collider (ILC). The basic model for the cavity quality factor Q-slope in high gradient SRF cavities, i.e. the reduction of Q wi...

National Technical Information Service (NTIS)

83
Design of a New Electropolishing System for SRF Cavities
2006-07-01

Electropolishing (EP) is considered the baseline surface treatment for Superconducting RF (SRF) cavities to achieve >35 MV/m accelerating gradient for the International Linear Collider (ILC). Based on the lessons learned at the forerunners such as KEK/Nomura, DESY and JLAB and on the recent studies, we have started a new design of the next EP system ...

Energy Citations Database

84
Calorimeter energy calibration using the energy conservation law
2007-12-01

A new calorimeter energy calibration method was developed for the proposed ILC detectors. The method uses the center-of-mass energy of the accelerator as the reference. It has been shown that using the energy conservation law it is possible to make ECAL and HCAL cross calibration to reach a good energy resolution for the simple calorimeter energy sum.

NASA Astrophysics Data System (ADS)

85
Analytical Expression For The Luminosity of Gamma-p Colliders
2007-04-01

Two linear accelerator projects CLIC (Compact Linear Collider) and ILC (International Linear Collider) with LHC (Large Hadron Collider) project offer a big opportunity to build ?p collider. In the ?p collider, high energy ? photons are produced by the Compton backscattering of the laser photons off high energy electrons at the conversion region. ...

NASA Astrophysics Data System (ADS)

86
A Prognostic Method for Scheduling Maintenance on the P2- Marx Modulator
2010-06-10

The SLAC National Accelerator Laboratory is developing a second generation Marx-type modulator for the ILC, the P2-Marx. The modulator is expected to operate reliably in excess of 10{sup 5} hours with minimum downtime. A prognostic system is being implemented with the development of the P2-Marx to monitor and track the health of key high voltage ...

Energy Citations Database

87
################# ILCAW0514

maximum the beam is su�ciently large that steel or tungsten plates can be absorb the tail of the beam � Snowmass, U.S.A. The International Linear Collider beam dumps R. Appleby The Cockcroft Institute, Daresbury The ILC beam dumps are a key part of the accelerator design. At Snowmass 2005, the current status

E-print Network

88
Latest Development in Superconducting RF Structures for beta=1 Particle Acceleration
2006-06-26

Superconducting RF technology is since nearly a decade routinely applied to different kinds of accelerating devices: linear accelerators, storage rings, synchrotron light sources and FEL's. With the technology recommendation for the International Linear Collider (ILC) a year ago, new emphasis has been placed on improving the ...

Energy Citations Database

89
Snowmass ILC Workshop: Fermilab ILC R&D Plan

Snowmass ILC Workshop: Fermilab ILC R&D Plan Shekhar Mishra Fermilab 9/07/05 #12;Goals of the 2nd ILC will be near Fermilab Japan and Europe are to determine sample sites by the end of 2005 5 of our 10 critical facilities. � TTF Facility (DESY) established facility, 30% allocated to ILC � ...

E-print Network

90
Suppressing Electron Cloud in Future Linear Colliders
2005-05-27

Any accelerator circulating positively charged beams can suffer from a build-up of an electron cloud (EC) in the beam pipe. The cloud develops through ionization of residual gases, synchrotron radiation and secondary electron emission and, when severe, can cause instability, emittance blow-up or loss of the circulating beam. The electron cloud is potentially a luminosity ...

Energy Citations Database

91
Secondary Electron Yield and Groove Chamber Tests in PEP-II
2007-11-06

Possible remedies for the electron cloud in positron damping ring (DR) of the International Linear Collider (ILC) includes thin-film coatings, surface conditioning, photon antechamber, clearing electrodes and chamber with grooves or slots [1]. We installed chambers in the PEP-II Low Energy Ring (LER) to monitor the secondary electron yield (SEY) of TiN, TiZrV (NEG) and ...

Energy Citations Database

92
Mitigation of Emittance Dilution Due to Transverse Mode Coupling in the L-Band Linacs of the ILC
2007-04-16

The main L-band linacs of the ILC accelerate 2820 bunches from a center of mass of 10 GeV to 500 GeV (and in the proposed later upgrade, to 1 TeV). The emittance of the vertical plane is approximately 400 times less than that of the horizontal plane. Provided the vertical and horizontal mode dipole frequencies are degenerate then the motion in each plane ...

DOE Information Bridge

93
Latest Results on Cavity Gradient and Input RF Stability at FLASH/TTF Facility
2010-08-25

The FLASH L-band (1.3 GHz) superconducting accelerator facility at DESY has a Low Level RF (LLRF) system that is similar to that envisioned for ILC. This system has extensive monitoring capability and was used to gather performance data relevant to ILC. Recently, waveform data were recorded with both beam on and off for three, 8-cavity ...

Energy Citations Database

94
Intrabeam Scattering Studies for the ILC Damping Rings Using a NewMATLAB Code
2006-06-21

A new code to calculate the effects of intrabeam scattering (IBS) has been developed in MATLAB based on the approximation suggested by K. Bane. It interfaces with the Accelerator Toolbox but can also read in lattice functions from other codes. The code has been benchmarked against results from other codes for the ATF that use this approximation or do the calculation in a ...

DOE Information Bridge

95
Hydro static water level systems at Fermilab
2006-09-01

Several Hydrostatic Water Leveling systems (HLS) are in use at Fermilab. Three systems are used to monitor quadrupoles in the Tevatron and two systems are used to monitor ground motion for potential sites for the International Linear Collider (ILC). All systems use capacitive sensors to determine the water level of water in a pool. These pools are connected with tubing so that ...

Energy Citations Database

96
FLASH Beam-Off RF Measurements and Analyses
2009-03-31

The FLASH L-band (1.3 GHz) superconducting accelerator facility at DESY has a Low Level RF (LLRF) system that is similar to that envisioned for ILC. This system has extensive monitoring capability and was used to gather performance data relevant to ILC. In particular, waveform data were recorded with beam off for three, 8-cavity ...

Energy Citations Database

97
Experimental study on SC RF cavities by using China large grain niobium for ILC
2008-02-01

Large grain niobium has the potential of simplifying the production sequence and consequently reducing the cost of the superconducting RF cavities for ILC. To investigate the feasibility of fabrication and the possibility to achieve high gradient by large grain cavities, two 1.3 GHz cavities were made of China large grain niobium and a series of vertical tests were carried out ...

NASA Astrophysics Data System (ADS)

98
Development of an Adder-Topology ILC Damping Ring Kicker Modulator
2009-05-08

The ILC damping ring injection and extraction kickers will require high availability modulators that can deliver {+-}5 kV pulses into 50 {Omega} with a 2 ns flattop ({approx}1 ns rise and fall time) at up to 6 MHz. An effort is underway at SLAC National Accelerator Laboratory to meet these requirements using a transmission line adder topology to combine ...

Energy Citations Database

99
Copper Prototype Measurements of the HOM, LOM and SOM Couplers for the ILC Crab Cavity
2008-06-23

The ILC Crab Cavity is positioned close to the IP and delivered luminosity is very sensitive to the wakefields induced in it by the beam. A set of couplers were designed to couple to and damp the spurious modes of the crab cavity. As the crab cavity operates using a dipole mode, it has different damping requirements from an accelerating cavity. A separate ...

Energy Citations Database

100
State of the Art in EM Field Computation
2006-09-25

This paper presents the advances in electromagnetic (EM) field computation that have been enabled by the US DOE SciDAC Accelerator Science and Technology project which supports the development and application of a suite of electromagnetic codes based on the higher-order finite element method. Implemented on distributed memory supercomputers, this state of the art simulation ...

Energy Citations Database

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101
Multibunch instabilities in subsystems of 0. 5 and 1. 0 TeV linear colliders
1988-11-01

The acceleration of multiple bunches per RF fill of the linac accelerating structures is an important feature of the SLAC design for a next-generation linear collider, in order to use the RF as efficiently as possible and to obtain a higher luminosity. In this paper, we give simulation results on the control of multibunch instabilities in the subsystems of ...

Energy Citations Database

102
Beam Position Monitoring with Cavity Higher Order Modes in the Superconducting Linac FLASH
2007-03-20

FLASH (Free Electron Laser in Hamburg) is a user facility for a high intensity VUV-light source [1]. The radiation wavelength is tunable in the range from about 40 to 13 nm by changing the electron beam energy from 450 to 700 MeV. The accelerator is also a test facility for the European XFEL (X-ray Free Electron Laser) to be built in Hamburg [2] and the project study ...

Energy Citations Database

103
Analysis of Ion Motion and Scattering in the Extreme Regime of High Intensity Electron Beams in Plasma Wakefield Accelerators
2006-11-27

Plasma wakefield accelerator is examined in the extreme regime of nanometer transverse beam sizes, typical of designs in the multi-TeV range. We find that ion motion, synchrotron radiation, nuclear scattering and particle trapping constrain the design parameters in which high beam quality and efficiency can be maintained. For a particular example relevant to an ...

Energy Citations Database

104
ACCELERATORS: Thermal simulation and analysis of the STF cryomodule
2009-03-01

STF is a superconducting RF test facility constructed at the high energy accelerator research organization of Japan (KEK), as a main part of a R&D project for the proposed International Linear Collider (ILC) in Asia. Thermal study of the STF 1.3 GHz 9-cell cavity cryomodule was carried out within a collaboration between China and Japan. Static and ...

NASA Astrophysics Data System (ADS)

105
Matter, Energy, Space and Time: The International Linear Collider Physics Prospects and International Aspects
2006-04-01

Over the past century, physicists have sought to explain the character of the matter and energy in our universe, to show how the basic forces of nature and the building blocks of matter come about, and to explore the fabric of space and time. In the past three decades, experiments at laboratories around the world have given us a precise confirmation of the underlying theory called the standard ...

NASA Astrophysics Data System (ADS)

106
ILC @ SLAC R&D Program for a Polarized RF Gun
2006-01-25

Photocathode rf guns produce high-energy low-emittance electron beams. DC guns utilizing GaAs photocathodes have proven successful for generating polarized electron beams for accelerators, but they require rf bunching systems that significantly increase the transverse emittance of the beam. With higher extraction field and beam energy, rf guns can support higher current ...

DOE Information Bridge

107
Collimation Optimizations, Capture Efficiency, and Primary-beam Power Loss in the ILC Positron Source Transport
2007-09-28

The ILC positron beam generated from a thin Ti target has a wide energy spread and large transverse divergence. With the collection optics immediately downstream of the target and pre-acceleration to 125 MeV, the collected positron beam still has a long tail of positrons with low energies and large transverse divergence, which will be lost in the rest of ...

DOE Information Bridge

108
Collimation Optimizations, Capture Efficiency, and Primary-Beam Power Loss in the ILC Positron Source
2008-07-02

The ILC positron beam generated from a thin Ti target has a wide energy spread and large transverse divergence. With the collection optics immediately downstream of the target and pre-acceleration to 125 MeV, the collected positron beam still has a long tail of positrons with low energies and large transverse divergence, which will be lost in the rest of ...

DOE Information Bridge

109
Coaxial Coupling Scheme for TESLA/ILC-type Cavities
2010-05-01

This paper reports about our efforts to develop a flangeable coaxial coupler for both HOM and fundamental coupling for 9-cell TESLA/ILC-type cavities. The cavities were designed in early 90�s for pulsed operation with a low duty factor, less than 1 %. The proposed design of the coupler has been done in a way, that the magnetic flux B at the flange connection is minimized and ...

Energy Citations Database

110
An RF Waveguide Distribution System for the ILC Test Accelerator at Fermilab's NML
2007-06-27

An ILC R&D facility is being constructed in the NML building at Fermilab which, in addition to an injector and beam dump with spectrometer, will contain up to three cryomodules of ILC-type superconducting 9-cell cavities. This linac will be powered by a single klystron. As part of SLAC's contribution to this project, we will provide a ...

DOE Information Bridge

111
ILC Vertex Tracker R&D
2007-10-01

This document summarizes past achievements, current activities and future goals of the R&D program aimed at the design, prototyping and characterization of a full detector module, equipped with monolithic pixel sensors, matching the requirements for the Vertex Tracker at the ILC. We provide a plan of activities to obtain a demonstrator multi-layered vertex tracker ...

Energy Citations Database

112
3.9 GHz superconducting accelerating 9-cell cavity vertical test results
2007-06-01

The 3rd harmonic 3.9GHz accelerating cavity was proposed to improve the beam performance of the FLASH (TTF/DESY) facility [1]. In the frame of a collaborative agreement, Fermilab will provide DESY with a cryomodule containing a string of four cavities. In addition, a second cryomodule with one cavity will be fabricated for installation in the Fermilab photo-injector, which ...

DOE Information Bridge

113
Lessons Learned from the Jefferson Lab - SNS Cryomodule Production Run
2005-08-29

In light of the recent developments with the International Linear Collider (ILC), and the recommendation to utilize ''Cold'' technology for this future particle accelerator, this paper will present the lessons learned from the recently concluded Spallation Neutron Source (SNS) superconducting radio frequency (SRF) ...

DOE Information Bridge

114
Development of High Gradient Superconducting Radio Frequency Cavities for International Linear Collider and Energy Recovery Linear Accelerator
2009-01-01

Superconducting radio frequency (SRF) cavities were used for storage rings like TRISTAN at KEK, HERA at DESY and LEP-II at CERN in 1990-2000. This technology has been accepted as a common accelerator technology. In August 2004, ITPR recommended an electron/positron linear collider based on SRF technology for the future high energy physics. ICFA accepted the recommendation and ...

NASA Astrophysics Data System (ADS)

115
An L-Band Superconducting Traveling Wave Accelerating Structure With Feedback
2009-01-22

The most severe problem of the International Linear Collider is its high cost, resulting in part from the enormous length of the collider. This length is determined mainly by the achievable accelerating gradient in the RF system of the ILC. In the ILC project the required accelerating gradient is higher than 30 ...

Energy Citations Database

116
ATF2 Proposal
2005-08-23

This document is the first of two volumes describing the ATF2 project. The present volume discusses the technical justification for ATF2 and presents a design description. Since the International Committee for Future Accelerator (ICFA) decision on the choice of technology, a world-wide collaboration on the design of the International Linear Collider (ILC) ...

Energy Citations Database

117
QUALIFICATION TESTS OF INTERNATIONAL LUBRICANT ...
1963-02-27

... INTERNATIONAL LUBRICANT CORPORATION GRADE 1100 ILC CODE 14206 AND ILC CODE 14207 AIRCRAFT ENGINE LUBRICATING OILS. ...

DTIC Science & Technology

118
International linear collider reference design report
2007-06-22

The International Linear Collider will give physicists a new cosmic doorway to explore energy regimes beyond the reach of today's accelerators. A proposed electron-positron collider, the ILC will complement the Large Hadron Collider, a proton-proton collider at the European Center for Nuclear Research (CERN) in Geneva, Switzerland, together ...

Energy Citations Database

119
Vibrational measurement for commissioning SRF Accelerator Test Facility at Fermilab
2011-03-01

The commissioning of two cryomodule components is underway at Fermilab's Superconducting Radio Frequency (SRF) Accelerator Test Facility. The research at this facility supports the next generation high intensity linear accelerators such as the International Linear Collider (ILC), a new high intensity injector (Project X) and ...

Energy Citations Database

120
Superconducting travelling wave ring with high gradient accelerating section
2007-06-01

Use of a superconducting traveling wave accelerating (STWA) structure instead of a standing wave cavity has major advantages in increasing the accelerating gradient in the ILC. In contrast with standing wave cavity STWA requires feedback loop, which sends wave from the structure output to input, making a superconducting traveling wave ...

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121
Prospects for a Very High Power CW Srf Linac
2010-06-01

Steady development in SRF accelerator technology combined with the success of large scale installations such as CEBAF at Jefferson Laboratory and the SNS Linac at ORNL gives credibility to the concept of very high average power CW machines for light sources or Proton drivers. Such machines would be powerful tools for discovery science in themselves but could also pave the way ...

NASA Astrophysics Data System (ADS)

122
PROSPECTS FOR A VERY HIGH POWER CW SRF LINAC
2010-06-01

Steady development in SRF accelerator technology combined with the success of large scale installations such as CEBAF at Jefferson Laboratory and the SNS Linac at ORNL gives credibility to the concept of very high average power CW machines for light sources or Proton drivers. Such machines would be powerful tools for discovery science in themselves but could also pave the way ...

Energy Citations Database

123
Estimation of orbit change and emittance growth due to random misalignment in long linacs
2011-01-01

In linear accelerators, the transverse beam orbit is induced by tilts of accelerating cavities (deviation of accelerating field direction from designed beam direction) and transverse offset of quadrupole magnets. Estimating induced orbit and emittance growth due to such random errors is important for evaluation of performance of ...

NASA Astrophysics Data System (ADS)

124
Beam dynamics simulations of the NML photoinjector at Fermilab
2010-08-01

Fermilab is currently constructing a superconducting RF (SRF) test linear accelerator at the New Muon Lab (NML). Besides testing SRF accelerating modules for ILC and Project-X, NML will also eventually support a variety of advanced accelerator R&D experiments. The NML incorporates a 40 MeV photoinjector ...

Energy Citations Database

125
Advanced acceleration schemes for e+e - colliders
2011-04-01

The physics case for a TeV-scale electron-positron linear collider has been endorsed by the international high energy physics community. In support of this physics program, the International Linear Collider Global Design Effort (ILC-GDE) has developed a detailed design for a 500 GeV collider based on 1.3 GHz superconducting rf cavities that would operate at 35 MV/m. At the ...

NASA Astrophysics Data System (ADS)

126
The Conversion and operation of the Cornell electron storage ring as a test accelerator (cesrta) for damping rings research and development
2009-05-01

In March of 2008, the Cornell Electron Storage Ring (CESR) concluded twenty eight years of colliding beam operations for the CLEO high energy physics experiment. We have reconfigured CESR as an ultra low emittance damping ring for use as a test accelerator (CesrTA) for International Linear Collider (ILC) damping ring R&D. The primary goals of the ...

Energy Citations Database

127
Jefferson Lab IEC 61508/61511 Safety PLC Based Safety System
2009-10-01

This paper describes the design of the new 12 GeV Upgrade Personnel Safety System (PSS) at the Thomas Jefferson National Accelerator Facility (TJNAF). The new PSS design is based on the implementation of systems designed to meet international standards IEC61508 and IEC 61511 for programmable safety systems. In order to meet the IEC standards, TJNAF engineers evaluated ...

DOE Information Bridge

128
B-Target Room Tunnel Redesigned
2010-08-25

Several groups at SLAC National Accelerator Laboratory are currently working on a RF Modulator prototype for a future linear collider known as the International Linear Collider (ILC). The ILC runs using about a 1000 Klystrons which create high power carrier waves for the particle acceleration. Klystrons receive ...

DOE Information Bridge

129
Summary of Polarized e{sup -}/e{sup +} Source Presentations
2008-02-06

The development of polarized electron sources in the 1970s capable of generating beams for injection into electron accelerators has been a major enabling factor for spin physics with electrons during the past quarter century. These sources continue to be refined for higher polarization and better operability. Recent developments were presented at this workshop in both plenary ...

Energy Citations Database

130
Summary of Polarized e-/e+ Source Presentations
2007-11-28

The development of polarized electron sources in the 1970s capable of generating beams for injection into electron accelerators has been a major enabling factor for spin physics with electrons during the past quarter century. These sources continue to be refined for higher polarization and better operability. Recent developments were presented at this workshop in both plenary ...

Energy Citations Database

131
Status of High Polarization DC High Voltage GaAs Photoguns
2007-08-01

This talk will review the state of the art of high polarization GaAs photoguns used worldwide. Subject matter will include drive laser technology, photocathode material, gun design, vacuum requirements and photocathode lifetime as a function of beam current. Recent results have demonstrated high current, 85% polarized beams with high reliability and long lifetime under operational conditions. ...

Energy Citations Database

132
Review of Linear Colliders in the Framework of Future World Accelerators
2003-05-09

The HEP communities in three major regions, Asia, Europe and North America, have recently agreed that experimental particle physics in the next twenty years will be greatly enriched if an e{sup +}e{sup -} linear collider were to be available in the TeV c.m. energy range to supplement the opportunities offered by the LHC. This abridged paper of a longer oral presentation at ICHEP 2002 outlines ...

DOE Information Bridge

133
Progress on using NEA cathodes in an RF gun
2005-05-01

RF guns have proven useful in multiple accelerator applications, and are an attractive electron source for the ILC. Using a NEA GaAs photocathode in such a gun allows for the production of polarized electron beams. However the lifetime of a NEA cathode in this environment is reduced by ion and electron bombardment and residual gas oxidation. We report ...

Energy Citations Database

134
Processing and Breakdown Localization Rresults For an L-Band Standing-Wave Cavity
2009-08-03

An L-band (1.3 GHz), normal-conducting, 5-cell, standing-wave cavity that was built as a prototype capture accelerator for the ILC is being high-power processed at SLAC. The goal is to demonstrate stable operation at 15 MV/m with 1 msec, 5 Hz pulses and the cavity immersed in a 0.5 Telsa solenoidal magnetic field. This paper summarizes the performance that ...

Energy Citations Database

135
Photon Collider Technology Overview
2005-07-28

The photon collider option requires the generation of large amounts of laser power to drive the Compton scattering. The selection of the superconducting RF for the baseline of the ILC makes a recirculating solution attractive. A baseline for a recirculating cavity for the photon collider has been developed by a team [1, 2] at DESY/Zeuthen and the Max Born Institute. Similar ...

Energy Citations Database

136
Optimal coupler and power setting for superconductive linear accelerators
2008-09-01

The modeling analysis presented in this paper addresses the question of how to achieve the highest vector sum gradient for all beam currents when individual cavities operate at different gradients due to their inherent quenching limitations. The analytical method explained here constitutes a step forward toward the operability of the International Linear Collider (ILC), ...

DOE Information Bridge

137
Katja Honkavaara, TTF/VUV-FEL meeting, 21.02.2006 TTF/VUV-FEL meeting 21.02.2006

Katja Honkavaara, TTF/VUV-FEL meeting, 21.02.2006 TTF/VUV-FEL meeting 21.02.2006 Overview + QE measurements #12;Katja Honkavaara, TTF/VUV-FEL meeting, 21.02.2006 Accelerator studies in KW 9-14 � Priority on ILC and XFEL related studies (not VUV-FEL) � VUV-FEL benefits directly or indirectly from most

E-print Network

138
High resolution upgrade of the ATF damping ring BPM system
2008-05-01

A beam position monitor (BPM) upgrade at the KEK Accelerator Test Facility (ATF) damping ring has been accomplished in its first stage, carried out by a KEK/FNAL/SLAC collaboration under the umbrella of the global ILC R&D effort. The upgrade consists of a high resolution, high reproducibility read-out system, based on analog and digital ...

Energy Citations Database

139
High Availability Electronics Standards
2006-12-13

Availability modeling of the proposed International Linear Collider (ILC) predicts unacceptably low uptime with current electronics systems designs. High Availability (HA) analysis is being used as a guideline for all major machine systems including sources, utilities, cryogenics, magnets, power supplies, instrumentation and controls. R&D teams are seeking to achieve ...

Energy Citations Database

140
Design of the ILC Prototype FONT4 Digital Intra-Train Beam-Based Feedback System
2007-04-16

We present the design of the FONT4 digital intra-train beam position feedback system prototype and preliminary results of initial beam tests at the Accelerator Test Facility (ATF) at KEK. The feedback system incorporates a fast analogue beam position monitor (BPM) front-end signal processor, a digital feedback board, and a kicker driver amplifier. The short bunchtrain, ...

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141
International Linear Collider Accelerator Physics R&D
2008-09-03

ILC work at Illinois has concentrated primarily on technical issues relating to the design of the accelerator. Because many of the problems to be resolved require a working knowledge of classical mechanics and electrodynamics, most of our research projects lend themselves well to the participation of undergraduate research assistants. The undergraduates in ...

Energy Citations Database

142
Vertical Arc for ILC Low Emittance Transport
2005-06-07

The design and parameters of a vertical arc for the ILC Low Emittance Transport (LET) are reviewed. A 1 TeV CM ILC which relies upon 30 MV/m accelerating cavities with a packing fraction of 65% will require almost 48 km of main linac, which suggests that the total site length including BDS and bunch compressors will be on the order of ...

DOE Information Bridge

143
SuperB: A High-Luminosity Asymmetric e+e- Super Flavor Factory
2007-05-18

We discuss herein the exciting physics program that can be accomplished with a very large sample of heavy quark and heavy lepton decays produced in the very clean environment of an e{sup +}e{sup -} collider; a program complementary to that of an experiment such as LHCb at a hadronic machine. It then presents the conceptual design of a new type of e{sup +}e{sup -} collider that produces a nearly ...

Energy Citations Database

144
Numerical studies of International Linear Collider positron target and optical matching device field effects on beam
2007-07-01

For an International Linear Collider (ILC) undulator-based positron source target configuration, a strong optical matching device (OMD) field is needed inside the target to increase the positron yield (by more than 40%) [Y. K. Batygin, Proceedings of the 2005 ALCPG and ILC Workshops, Snowmas, CO, 14-27 August 2005 (unpublished)] It is also required that ...

Energy Citations Database

145
Impact of SciDAC on accelerator projects across the office of science through electromagnetic modeling
2005-01-01

Electromagnetic Modelling led by SLAC is a principal component of the "Advanced Computing for 21st Century Accelerator Science and Technology" SciDAC project funded through the Office of High Energy Physics. This large team effort comprises three other national laboratories (LBNL, LLNL, SNL) and six universities (CMU, Columbia, RPI, Stanford, UC Davis and U of Wisconsin) with ...

NASA Astrophysics Data System (ADS)

146
Gradient limitations in room temperature and superconducting acceleration structures
2008-10-01

Accelerating gradient is a key parameter of the accelerating structure in large linac facilities, like future Linear Collider. In room temperature accelerating structures the gradient is limited mostly by breakdown phenomena, caused by high surface electric fields or pulse surface heating. High power processing is a necessary procedure ...

Energy Citations Database

147
Center for Accelerator Science and Technology at MIT -- A New Initiative
2005-04-01

MIT is proposing to establish a new interdisciplinary Center for Accelerator Science and Technology (CAST) led by faculty from across the Schools of Science and Engineering that would carry out frontier R&D and have a strong educational program. The initial research focus includes development of technologies relevant to major accelerator initiatives ...

NASA Astrophysics Data System (ADS)

148
The Use of Integrated Electronic Data Capture and Analysis for Accelerator Construction and Commissioning: Pansophy from the SNS Towards the ILC
2005-05-01

Jefferson Lab has extensively used a proprietary web-based system (Pansophy) that integrates commercial database, data analysis, document archiving and retrieval, and user interface software, as a coherent knowledge management product during the construction of the cryomodules for the SNS Superconducting Linac, providing elements of process and procedure control, data capture and review, and data ...

DOE Information Bridge

149
Project X: A High Intensity Proton Source at Fermilab
2010-11-01

As the Fermilab Tevatron Collider program draws to a close a strategy has emerged of an experimental program built around the high intensity frontier. The centerpiece of this program is a superconducting H- linac that will support world leading programs in long baseline neutrino experimentation and the study of rare processes, with potential applications in nuclear physics and nuclear energy. ...

NASA Astrophysics Data System (ADS)

150
Klystron switching power supplies for the Internation Linear Collider
2009-12-01

The International Linear Collider is a majestic High Energy Physics particle accelerator that will give physicists a new cosmic doorway to explore energy regimes beyond the reach of today's accelerators. ILC will complement the Large Hadron Collider (LHC), a proton-proton collider at the European Center for Nuclear Research ...

DOE Information Bridge

151
Extruded scintillator for the calorimetry applications
2006-08-01

An extrusion line has been installed and successfully operated at FNAL (Fermi National Accelerator Laboratory) in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new Facility will serve to further develop and improve extruded plastic scintillator. Recently progress has been made in producing co-extruded ...

DOE Information Bridge

152
Extruded scintillator for the Calorimetry applications
2006-10-27

An extrusion line has been installed and successfully operated at FNAL (Fermi National Accelerator Laboratory) in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new Facility will serve to further develop and improve extruded plastic scintillator. Recently progress has been made in producing co-extruded ...

Energy Citations Database

153
Extruded scintillator for the Calorimetry applications
2006-10-01

An extrusion line has been installed and successfully operated at FNAL (Fermi National Accelerator Laboratory) in collaboration with NICADD (Northern Illinois Center for Accelerator and Detector Development). This new Facility will serve to further develop and improve extruded plastic scintillator. Recently progress has been made in producing co-extruded ...

NASA Astrophysics Data System (ADS)

154
Determination of Dark Matter Properties at High-Energy Colliders
2006-11-05

If the cosmic dark matter consists of weakly-interacting massive particles, these particles should be produced in reactions at the nextgeneration of high-energy accelerators. Measurements at these accelerators can then be used to determine the microscopic properties of the dark matter. From this, we can predict the cosmic density, the annihilation cross ...

DOE Information Bridge

155
Determination of Dark Matter Properties at High-Energy Colliders
2006-01-01

hep-ph/yymmnnn If the cosmic dark matter consists of weakly-interacting massive particles, these particles should be produced in reactions at the next generation of high-energy accelerators. Measurements at these accelerators can then be used to determine the microscopic properties of the dark matter. From this, we can predict the cosmic density, the ...

E-print Network

156
Determination of Dark Matter Properties at High-Energy Collider
2006-02-24

If the cosmic dark matter consists of weakly-interacting massive particles, these particles should be produced in reactions at the next generation of high-energy accelerators. Measurements at these accelerators can then be used to determine the microscopic properties of the dark matter. From this, we can predict the cosmic density, the annihilation cross ...

DOE Information Bridge

157
Beam physics of the 8-GeV H-minus linac
2008-11-01

Fermilab is developing the concept and design of an 8-GeV superconducting H-minus linac with the primary mission of increasing the intensity of the Main Injector for the production of neutrino superbeams. The front-end of the linac up to 420 MeV operates at 325 MHz and accelerates beam from the ion source using a room temperature radio-frequency quadrupole followed by short CH ...

Energy Citations Database

158
Beam physics of the 8-GeV H linac
2009-07-01

Fermilab is developing the concept and design of an 8-GeV superconducting H linac with the primary mission of increasing the intensity of the Main Injector for the production of neutrino superbeams. The front-end of the linac up to 420 MeV operates at 325 MHz and accelerates the beam from the ion source using a room temperature radio-frequency quadrupole followed by short CH ...

NASA Astrophysics Data System (ADS)

159
Simulations of the ILC Electron Gun and ElectronBunching System
2006-08-30

The International Linear Collider (ILC) is a proposed electron-positron collider, expected to provide insight into important questions in particle physics. A part of the global R&D effort for the ILC is the design of its electron gun and electron bunching system. The present design of the bunching system has two sub-harmonic bunchers, one operating ...

DOE Information Bridge

160
Multibunch beam extraction using the strip-line kicker at the KEK Accelerator Test Facility
2011-05-01

The International Linear Collider (ILC) damping ring (DR) injection and extraction kickers have a very special role: the bunch spacing 189�480 ns is compressed to 3�9 ns when injected into the DR and then decompressed to 189�480 ns when leaving the DR. The kickers act as a bunch-by-bunch beam manipulator to compress and decompress the bunch spacing into/from the DR. They ...

NASA Astrophysics Data System (ADS)

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161
Low Emittance Guns for the ILC Polarized Electron Beam
2006-12-01

Polarized electron beams generated by DC guns are routinely available at several accelerators including JLAB, Mainz and SLAC. These guns operate with a cathode bias on the order of -100 kV. To minimize space charge effects, relatively long bunches are generated at the gun and then compressed longitudinally external to the gun just before and during initial ...

Energy Citations Database

162
Low Emittance Guns for the ILC Polarized Electron Beam
2007-06-13

Polarized electron beams generated by DC guns are routinely available at several accelerators including JLAB, Mainz and SLAC. These guns operate with a cathode bias on the order of -100 kV. To minimize space charge effects, relatively long bunches are generated at the gun and then compressed longitudinally external to the gun just before and during initial ...

Energy Citations Database

163
Electron Cloud Effects in Cornell Electron Storage Ring Test Accelerator and International Linear Collider Damping Ring
2011-02-01

In this paper, the effects of electron cloud are discussed for the ultra low emittance positron beam in Cornell Electron Storage Ring Test Accelerator (Cesr-TA) and the International Linear Collider (ILC) damping ring. We have investigated the electron-cloud instabilities with Cesr-TA which has been operating to experiment for the ILC ...

NASA Astrophysics Data System (ADS)

164
Three-cell traveling wave superconducting test structure
2011-03-01

Use of a superconducting traveling wave accelerating (STWA) structure with a small phase advance per cell rather than a standing wave structure may provide a significant increase of the accelerating gradient in the ILC linac. For the same surface electric and magnetic fields the STWA achieves an accelerating ...

Energy Citations Database

165
Niobium and its Impact on Superconducting Radiofrequency Technology
2011-03-01

The Continuous Electron Beam Accelerator Facility at Jefferson Lab in Newport News, Virginia, was the first large-scale deployment of superconducting radiofrequency (RF) technology, and was optimized for nuclear/high energy physics research. The success of this technology led to the creation of a Free Electron Laser (FEL) facility at Jefferson Lab that has achieved ...

NASA Astrophysics Data System (ADS)

166
High-Gradient Tests of the Single-Cell SC Cavity with a Feedback Waveguide
2010-11-04

Use of a superconducting (SC) traveling-wave accelerating (STWA) structure with a small phase advance per cell, rather than a standing-wave structure, may provide a significant increase in the accelerating gradient in the ILC linac [1]. For the same surface electric and magnetic fields, the STWA achieves an ...

Energy Citations Database

167
High-Gradient Tests of the Single-Cell SC Cavity with a Feedback Waveguide
2010-11-01

Use of a superconducting (SC) traveling-wave accelerating (STWA) structure with a small phase advance per cell, rather than a standing-wave structure, may provide a significant increase in the accelerating gradient in the ILC linac [1]. For the same surface electric and magnetic fields, the STWA achieves an ...

NASA Astrophysics Data System (ADS)

168
Design and Optimization of Large Accelerator Systems through High-Fidelity Electromagnetic Simulations
2008-08-01

SciDAC1, with its support for the 'Advanced Computing for 21st Century Accelerator Science and Technology' (AST) project, witnessed dramatic advances in electromagnetic (EM) simulations for the design and optimization of important accelerators across the Office of Science. In SciDAC2, EM simulations continue to play an important role in ...

Energy Citations Database

169
Start-to-end Transport Design and Multi-particle Tracking for the ILC Electron Source
2007-02-02

A train of 2-ns micro bunches of longitudinally polarized electrons are generated in a 120-kV DC-gun based injector in the ILC electron source; a bunching system with extremely high bunching efficiency to compress the micro-bunch down to 20 ps FWHM is designed. Complete optics to transport the electron bunch to the entrance of the 5-GeV damping ring injection line is ...

DOE Information Bridge

170
Secondary Electron Yield Measurements and Groove Chambers Tests in the PEP-II Beam Line Straights Sections
2008-07-03

Beam instability caused by the electron cloud has been observed in positron and proton storage rings and it is expected to be a limiting factor in the performance of the positron Damping Ring (DR) of future Linear Colliders such as ILC and CLIC [1, 2]. In the Positron Low Energy Ring (LER) of the PEP-II accelerator, we have installed vacuum chambers with ...

Energy Citations Database

171
Resolution of a High Performance Cavity Beam Positron Monitor System
2007-07-06

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors ...

DOE Information Bridge

172
Resolution of a High Performance Cavity Beam Position Monitor System
2005-09-12

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved - ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors ...

DOE Information Bridge

173
Performance of a Nanometer Resolution BPM System
2007-04-24

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors ...

DOE Information Bridge

174
Performance of a Nanometer Resolution BPM System
2005-10-14

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. it is important to the ongoing ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that an RF cavity BPM with modern ...

DOE Information Bridge

175
PERFORMANCE OF A NANOMETER RESOLUTION BPM SYSTEM
2006-06-21

International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors ...

DOE Information Bridge

176
P1-Marx Modulator for the ILC
2010-08-26

A first generation prototype, P1, Marx-topology klystron modulator has been developed at the SLAC National Accelerator Laboratory for the International Linear Collider (ILC) project. It is envisioned as a lower cost, smaller footprint, and higher reliability alternative to the present, bouncer-topology, baseline design. The application requires 120 kV ...

Energy Citations Database

177
Localization of RF Breakdowns in a Standing Wave Cavity
2009-08-03

At SLAC, a 5-cell, normal-conducting, L-band (1.3 GHz), standing-wave (SW) cavity was built as a prototype positron capture accelerator for the ILC. The structure met the ILC gradient goal but required extensive rf processing. When rf breakdowns occurred, a large variation was observed in the decay rate of the stored energy in the ...

DOE Information Bridge

178
Klystron Cluster Scheme for ILC High Power RF Distribution
2009-07-06

We present a concept for powering the main linacs of the International Linear Collider (ILC) by delivering high power RF from the surface via overmoded, low-loss waveguides at widely spaced intervals. The baseline design employs a two-tunnel layout, with klystrons and modulators evenly distributed along a service tunnel running parallel to the accelerator ...

Energy Citations Database

179
ILC Marx Modulator Development Program Status
2009-03-04

Development of a first generation prototype (P1) Marx-topology klystron modulator for the International Linear Collider is nearing completion at the Stanford Linear Accelerator Center. It is envisioned as a smaller, lower cost, and higher reliability alternative to the present, bouncer-topology, 'Baseline Conceptual Design'. The Marx presents several ...

Energy Citations Database

180
Compact, Intelligent, Digitally Controlled IGBT Gate Drivers for a PEBB-based ILC Marx Modulator
2010-06-07

SLAC National Accelerator Laboratory has built and is currently operating a first generation prototype Marx klystron modulator to meet ILC specifications. Under development is a second generation prototype, aimed at improving overall performance, serviceability, and manufacturability as compared to its predecessor. It is designed around 32 cells, each ...

DOE Information Bridge

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181
ATF2 High Availability Power Supplies
2008-06-27

ATF2 is an accelerator test facility modeled after the final focus beamline envisioned for the ILC. By the end of 2008, KEK plans to commission the ATF2 [1]. SLAC and OCEM collaborated on the design of 38 power systems for beamline magnets. The systems range in output power from 1.5 kW to 6 kW. Since high availability is essential for the success of the ...

DOE Information Bridge

182
Superconducting Magnet Needs for the ILC.
2007-01-01

The ILC Reference Design Report was completed early in February 2007. The Magnet Systems Group was formed to translate magnetic field requirements into magnet designs and cost estimates for the Reference Design. As presently configured, the ILC will have ...

National Technical Information Service (NTIS)

183
International Large Detector: Letter of Intent.
2010-01-01

The International Large Detector (ILD) is a concept for a detector at the International Linear Collider, ILC. The ILC will collide electrons and positrons at energies of initially 500 GeV, upgradeable to 1 TeV. The ILC has an ambitious physics program, wh...

National Technical Information Service (NTIS)

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