Report on first masing and single mode locking in a prebunched beam FEM oscillator

Conference · Sun Dec 31 04:00:00 EST 1995

DOI:https://doi.org/10.1016/0168-9002(95)01501-9· OSTI ID:238609

Cohen, M; Eichenbaum, A; Kleinman, H ^[1]

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1. Tel-Aviv Univ., Ramat-Aviv (Israel); and others

Radiation characteristics of a table-top free electron maser (FEM) are described in this paper. The FEM employs a prebunched electron beam and is operated as an oscillator in the low-gain collective (Raman) regime. Using electron beam prebunching single mode locking at any one of the possible oscillation modes was obtained. The electron beam is prebunched by a microwave tube section before it is injected into the wiggler. By tuning the electron beam bunching frequency, the FEM oscillation frequency can be locked to any eigen frequency of the resonant waveguide cavity which is within the frequency band of net gain of the FEM. The oscillation build up process is sped up, when the FEM operates with a prebunched electron beam, and the build-up time of radiation is shortened significantly. First measurements of masing with and without prebunching and characterization of the emitted radiation are reported.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• OSTI ID: 238609
• Report Number(s): BNL--61982-Absts.; CONF-9508156--Absts.; ON: DE96002729
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
BEAM BUNCHING
ELECTRON BEAMS
FREE ELECTRON LASERS
MASERS
MICROWAVE RADIATION
MODE LOCKING
WIGGLER MAGNETS