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Proceedings Paper

Numerical study of free-electron lasers with reversed guide field
Author(s): Ge Zhang; Gennady Shvets; Jonathan S. Wurtele
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Paper Abstract

Numerical studies of the high efficiency results recently reported by Conde and Bekefi for a reversed field FEL are presented. These studies indicate that the predicted saturated power is rather sensitive to the detailed model used of the space-charge forces. The reported results for Group I FEL operation can be reproduced by increasing the emittance by 45% compared with the reversed field case. In this regime particle loss, rather than trapping, is the saturation mechanism. The Group II results are not consistent with the single-frequency model. A two- frequency model has been developed to study the influence of competition between the modes of the upper and lower FEL intersections. Initial results from this model indicates that the low power in the Group II experiment is not a consequence of mode competition.

Paper Details

Date Published: 8 July 1993
PDF: 8 pages
Proc. SPIE 1872, Intense Microwave Pulses, (8 July 1993);
Show Author Affiliations
Ge Zhang, Massachusetts Institute of Technology (United States)
Gennady Shvets, Massachusetts Institute of Technology (United States)
Jonathan S. Wurtele, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1872:
Intense Microwave Pulses
Howard E. Brandt, Editor(s)

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