Title :
Burst mode FEL with the ETA-III induction linac
Author :
Lasnier, C.J. ; Allen, S.L. ; Felker, B. ; Fenstermacher, M.E. ; Ferguson, S.W. ; Hulsey, S.D. ; Hooper, E.B. ; Jackson, M.C. ; Makowski, M.A. ; Meyer, W.H. ; Moller, J.M. ; Petersen, D.E. ; Sampayan, S.E. ; Stallard, B.W. ; Fields, W.F. ; Oasa, K.
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
Abstract :
Pulses of 140 GHz microwaves have been produced at a 2 kHz rate using the ETA-III induction linac and IMP wiggler. The accelerator was run in bursts of up to 50 pulses at 6 MeV and greater than 2 kA peak current. A feedback timing control system was used to synchronize acceleration voltage pulses with the electron beam, resulting in sufficient reduction of the corkscrew and energy sweep for efficient FEL operation. Peak microwave power for short bursts was in the range 0.5-1.1 GW, which is comparable to the single-pulse peak power of 0.75-2 GW. FEL bursts of more than 25 pulses were obtained
Keywords :
electron accelerators; free electron lasers; fusion reactor instrumentation; linear accelerators; microwave generation; wigglers; 0.5 to 1.1 GW; 0.75 to 2 GW; 140 GHz; 2 kA; 2 kHz; 6 MeV; ETA-III induction linac; IMP wiggler; acceleration voltage pulse synchronisation; burst mode FEL; corkscrew reduction; electron beam; energy sweep; feedback timing control system; peak microwave power; single-pulse peak power; Acceleration; Electron beams; Linear particle accelerator; Particle beams; Pulse compression methods; Pulse power systems; Pulsed power supplies; Timing; Undulators; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308551
