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Proceedings Paper

Mode Competition, Suppression And Control In Fel Oscillators
Author(s): Baruch Levush; Thomas M. Antonsen
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Paper Abstract

The effect of multimode interaction on the efficiency of a low gain FEL oscillator fed by a continuous beam is investigated. Calculations that enable one to design a device in such a way that it will operate at a single frequency with maximum efficiency will he presented. The model we consider is the one dimensional, low gain oscillator.' Due to low gain, the radiation field in the resonator can he expressed as a superposition of empty cavity modes whose amplitudes and phases change slowly in time (compared with the transit time of the electrons through the interaction region) due to their interaction with the beam. The field at any point will he nearly periodic in time with a period equal to the round trip travel time of radiation in the cavity, which we assume to he much smaller than the time scale over which the amplitudes change. We may then numerically integrate the following set of equations.

Paper Details

Date Published: 18 November 1989
PDF: 2 pages
Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); doi: 10.1117/12.978342
Show Author Affiliations
Baruch Levush, University of Maryland (United States)
Thomas M. Antonsen, University of Maryland (United States)

Published in SPIE Proceedings Vol. 1039:
13th Intl Conf on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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