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Energy sweep compensation of induction accelerators
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In this paper, the ETA-II linear induction accelerator (LIA) is designed to drive a microwave free electron laser (FEL) and beam energy sweep must be limited to 1% for 50 ns to limit beam corkscrew motion and ensure high power FEL output over the full duration of the beam flattop.Abstract:
The ETA-II linear induction accelerator (LIA) is designed to drive a microwave free electron laser (FEL). Beam energy sweep must be limited to {plus minus}1% for 50 ns to limit beam corkscrew motion and ensure high power FEL output over the full duration of the beam flattop. To achieve this energy sweep requirement, we have implemented a pulse distribution system and are planning implementation of a tapered pulse forming line (PFL) in the pulse generators driving acceleration gaps. The pulse distribution system assures proper phasing of the high voltage pulse to the electron beam. Additionally, cell-to-cell coupling of beam induced transients is reduced. The tapered PFL compensates for accelerator cell and loading nonlinearities. Circuit simulations show good agreement with preliminary data and predict the required energy sweep requirement can be met.read more
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Proceedings ArticleDOI
Generation of high power 140 GHz microwaves with an FEL for the MTX experiment
S.L. Allen,C.J. Lasnier,Brian Felker,M.E. Fenstermacher,S.W. Ferguson,S. Fields,E. B. Hooper,S. D. Hulsey,M. A. Makowski,J.M. Moller,W.H. Meyer,D.E. Petersen,Ernst Ted Scharlemann,B. W. Stallard,R. D. Wood +14 more
TL;DR: In this article, the improved ETA-II linear induction accelerator (ETA-III) and the IMP steady-state wiggler were used to generate high power (1-2 GW) microwaves at 140 GHz.
Proceedings ArticleDOI
Measurements of reduced corkscrew motion on the ETA-II linear induction accelerator
S.L. Allen,Hal R. Brand,F.W. Chambers,Y.-J. Chen,F.E. Coffield,F.J. Deadrick,L. V. Griffith,Darrel L. Lager,W.J. Mauer,W.E. Nexsen,A.C. Paul,S.E. Sampayan,W.C. Turner +12 more
TL;DR: In this article, the ETA-II linear induction accelerator is used to drive a microwave free-electron laser (FEL) and the measured transverse beam motion is less than 0.5 mm for 40 ns of the pulse.
Proceedings ArticleDOI
Control of energy sweep and transverse beam motion in induction linacs
TL;DR: In this paper, the most important advances are: understanding of focusing magnetic field errors and improvements in alignment of the magnetic axis, a redesign of the high-voltage pulse distribution system between the magnetic compression modulators and the accelerator cells, and exploitation of a beam tuning algorithm for minimizing transverse beam motion.
Proceedings ArticleDOI
Performance characteristics of an induction linac magnetic pulse compression modulator at multi-kilohertz pulse repetition frequencies
S.E. Sampayan,F.W. Chambers,F.J. Deadrick,W.A. Niven,C.W. Ollis,A.N. Payne,V.L. Renbarger,Ernst Ted Scharlemann,W.C. Turner,J. Watson +9 more
TL;DR: In this article, the ETA-II linear induction accelerator utilizes four pulse power conditioning chains, and the MAG1-Ds form the last state of each chain, and they were evaluated on a high-average-power test stand (HAPTS).
Proceedings ArticleDOI
Reduction of energy sweep of the ETA-II beam
TL;DR: In this article, a multicable pulsed power feed design was tested in a shortened version of ETA-II where it extended the time during which the beam energy stayed within the +1% limits to greater than 40 ns.