Journal ArticleDOI
Corkscrew modes in linear accelelators
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In this paper, the authors investigated the corkscrew mode in linear accelerators, in which a solenoidal beam-transport system is used, both analytically and numerically.Abstract:
The corkscrew mode in linear accelerators, in which a solenoidal beam-transport system is used, is investigated both analytically and numerically. By assuming that both the acceleration gaps and the drift regions between the adjacent magnets are infinitesimal, it is possible to treat the corkscrew mode analytically and to obtain an expression for the corkscrew mode amplitude and the effective emittance growth as a function of the energy variation within the beam pulse and of the tilts of the injector and the solenoid magnets. Reduction of the corkscrew mode amplitude is possible by an energy compensation scheme. This energy compensation scheme is studied numerically for the Experimental Test Accelerator II (ETA-II) configuration. We find that applying the energy compensation scheme at the beginning of the accelerator can reduce the corkscrew mode amplitude by a factor of two.read more
Citations
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Journal ArticleDOI
Beam dynamics of the Neutralized Drift Compression Experiment-II, a novel pulse-compressing ion accelerator
Aharon Friedman,J.J. Barnard,Ronald H. Cohen,David P. Grote,S.M. Lund,W.M. Sharp,A. Faltens,Enrique Henestroza,Jin-Young Jung,J.W. Kwan,Edward P. Lee,Matthaeus Leitner,B.G. Logan,Jean-Luc Vay,W.L. Waldron,Ronald C. Davidson,Mikhail Dorf,Erik P. Gilson,Igor Kaganovich +18 more
TL;DR: The Neutralized Drift Compression Experiment (NDCXII) at the Lawrence Berkeley National Laboratory (LBNL) as mentioned in this paper is a state-of-the-art NDCX-II particle accelerator with an initial nonneutralized compression that renders the pulse short enough that existing high-voltage pulsed power can be employed.
Journal ArticleDOI
The NDCX-II engineering design
W.L. Waldron,W.J. Abraham,Diego Arbelaez,Aharon Friedman,James E. Galvin,Erik P. Gilson,Wayne G. Greenway,David P. Grote,Jin-Young Jung,J.W. Kwan,Matthaeus Leitner,Steven Lidia,Thomas Lipton,L. Reginato,M. J. Regis,Prabir K. Roy,W.M. Sharp,M.W. Stettler,J.H. Takakuwa,J. Volmering,V. K. Vytla +20 more
TL;DR: The Neutralized Drift Compression Experiment (NDCX-II) is a user facility located at Lawrence Berkeley National Laboratory which is uniquely designed for ion-beam-driven high energy density laboratory physics and heavy ion fusion research as discussed by the authors.
Journal ArticleDOI
Long-pulse beam stability experiments on the DARHT-II linear induction accelerator
Carl Ekdahl,E.O. Abeyta,P. Aragon,R. Archuleta,R.R. Bartsch,H. Bender,R. Briggs,W. Broste,C. Carlson,K.C.D. Chan,D. Dalmas,S. Eversole,Daniel K. Frayer,R. Gallegos,J. Harrison,Thomas Patrick Hughes,E. Jacquez,D. Johnson,J. B. Johnson,B.T. McCuistian,N. Montoya,C. Mostrom,S. Nath,David M. Oro,L. Rowton,M. Sanchez,R. Scarpetti,Martin Schauer,Martin Schulze,Y. Tang,A. Tipton,C.Y. Tom +31 more
TL;DR: In this paper, the DARHT-II linear induction accelerator (LIA) produces a 2kA, 17-MeV electron beam in a 1600-ns flat-top pulse.
Journal ArticleDOI
Control of transverse motion caused by chromatic aberration and misalignments in linear accelerators
TL;DR: In this paper, a time-independent steering algorithm is proposed to minimize the observed corkscrew-amplitude averaged over the beam pulse, which is not sensitive to the alignment, calibration and spacing of the beam position monitors.
Journal ArticleDOI
Prototype microwave source for a relativistic klystron two-beam accelerator
Timothy L. Houck,F. Deadrick,G. Giordano,E. Henestroza,S. Lidia,L. Reginato,D. Vanecek,G.A. Westenskow,S. Yu +8 more
TL;DR: In this paper, a test facility is established at Lawrence Berkeley National Laboratory (LBNL) to study RF power sources for linear colliders based on the relativistic klystron two-beam accelerator (RK-TBA) concept.
References
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Beam dynamics in the advanced test accelerator (ata)
G.J. Caporaso,W. A. Barletta,D. L. Birx,Richard Briggs,Y.P. Chong,A. G. Cole,T. J. Fessenden,R. E. Hester,E. J. Lauer,V. K. Neil +9 more
TL;DR: In this paper, the performance of the Advanced Test Accelerator, a 50 MeV, 10 KA induction linac, is reviewed and a discussion of the operation of the plasma cathode electron source, beam transport throughout the accelerator, and transverse instabilities.
Journal ArticleDOI
Beam Breakup (BBU) Instability Experiments on the Experimental Test Accelerator (ETA) and Predictions for the Advanced Test Accelerator (ATA)
TL;DR: In linear accelerators, the maximum achievable beam current is often limited by the Beam Breakup (BBU) instability, which arises from the interaction of a transversely displaced beam with the dipole modes of the acceleration cavities as discussed by the authors.
Proceedings ArticleDOI
The ETA-II Induction Linac as a High-Average-Power FEL Driver
W.E. Nexsen,D.P. Atkinson,D.M. Barrett,Y.-J. Chen,J.C. Clark,L. V. Griffith,H. C. Kirbie,M.A. Newton,A.C. Paul,Stephen Sampayan,A.L. Throop,W.C. Turner +11 more
TL;DR: The Experimental Test Accelerator II (ETA-II) as discussed by the authors is the first induction linac designed specifically to FEL requirements and is used to drive a 140 and 250 GHz microwave FEL for plasma heating experiments at LLNL.
Engineering aspects and initial performance of ETA-II
D.S. Prono,D.M. Barrett,D.L. Birx,J.K. Boyd,G.J. Caporaso,J.C. Clark,C.F. Coffield,F.J. Deadrick,J. Klingmann,W.E. Nexsen,Newton,D. Ravenscroft,L.L. Reginato,W.C. Turner,G. A. Westenskow,K. Whitham +15 more
TL;DR: The Experimental Test Accelerator-II (ETA-II) as mentioned in this paper is a high-average-power induction accelerator constructed at the Lawrence Livermore National Laboratory (LLNL) in the US.
Journal ArticleDOI
Transverse misalignments in a driver
TL;DR: The transverse errors of the beam lines are usually corrected by an appropriate feedback to bring the beam back on axis In an induction linac, however, in this article the beam line errors are not corrected.
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