Waveguide mode deformation in free‐electron lasers
作者:
J. Fajans,
J. S. Wurtele,
期刊:
Physics of Fluids B: Plasma Physics
(AIP Available online 1989)
卷期:
Volume 1,
issue 10
页码: 2073-2084
ISSN:0899-8221
年代: 1989
DOI:10.1063/1.859072
出版商: AIP
数据来源: AIP
摘要:
The free‐electron laser (FEL)‐induced modifications to the vacuum waveguide modes are calculated for low‐frequency FEL’s. Typically, the mode modifications are large and exhibit complicated axial behaviors. In addition to the wave component with a near vacuum wavenumber, components at two upshifted wavenumbers must be analyzed. Electron beam surface charges and currents are also important. At low gain, effects from all three roots of the FEL dispersion relation must be included. The dominant modification is due to the electron beam space‐charge wave.
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