Lasing and radiation-mode dynamics in a Van de Graaff accelerator{endash}free-electron laser with an internal cavity

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120503· OSTI ID:565537

Abramovich, A; Arensburg, A; Chairman, D; Eichenbaum, A; Draznin, M; Gover, A; Kleinman, H; Merhasin, I; Pinhasi, Y; Sokolowski, J S; Yakover, Y M ^[1]; Cohen, M; Levin, L A; Shahal, O ^[2]; Rosenberg, A; Schnitzer, I; Shiloh, J ^[3]

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1. Department of Electrical Engineering and Physical Electronics, Faculty of Engineering, Tel-Aviv University, Ramat Aviv 69978 (Israel)
2. Physics Department, Nuclear Research Center-Negev, Beer Sheva 84190 (Israel)
3. Rafael, Haifa 31021 (Israel)

The lasing of a Van de Graaff electrostatic accelerator{endash}free-electron laser (EA{endash}FEL) with an internal cavity is reported. An EA{endash}FEL employing an internal cavity is a FEL configuration that has a potential to operate at high average power, high frequency, and possibly in a continuous wave (cw) mode. The initial lasing provided a pulsed radiation power of 1 kW at 100.5 GHz frequency. The FEL operated with a 1.4 A, 1.4 MeV electron beam in a recirculation (depressed collector) configuration. It utilizes a high quality (Q{approx}30000) Talbot effect resonator and a Halbach-type wiggler placed internally in the center of the accelerator tank. Nonlinear features of the oscillation power buildup and decay near saturation and mode hopping were observed and are interpreted. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 565537
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 71; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
DYNAMICS
FREE ELECTRON LASERS
GHZ RANGE
LASER CAVITIES
POWER RANGE 01-10 KW
VAN DE GRAAFF ACCELERATORS
WIGGLER MAGNETS