Spontaneous radiation of an electron beam in a free‐electron laser with a quadrupole wiggler
作者:
B. Levush,
T. M. Antonsen,
W. M. Manheimer,
期刊:
Journal of Applied Physics
(AIP Available online 1986)
卷期:
Volume 60,
issue 5
页码: 1584-1590
ISSN:0021-8979
年代: 1986
DOI:10.1063/1.337295
出版商: AIP
数据来源: AIP
摘要:
A calculation is presented of spontaneous radiation emitted by an electron beam passing through a continuously rotating quadrupole magnetic undulator. It is shown that radiation spectrum emitted in forward direction of beam propagation has four peaks, corresponding to four betatron frequencies. Utilizing the Madey theorem, a stimulated emission is calculated and presented as gain versus frequency curves, for different values of the quadrupole magnetic field. A free‐electron laser operating at two or three radiation frequencies with a quadrupole magnetic wiggler is suggested.
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