Self-field effects on instability of wave modes in a free-electron laser with background plasma

A dispersion relation for the plasma loaded free-electron laser (FEL), with a helical wiggler and an axial magnetic field is derived. The cold fluid formulation is used with self-fields of the electron beam taken into account. By solving the dispersion relation numerically the influence of self-fiel...

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Bibliographic Details
Published in:Journal of applied physics 2010-12, Vol.108 (12), p.123302-123302-7
Main Authors: Ghazavi, Atefeh, Maraghechi, Behrouz, Mohsenpour, Taghi
Format: Article
Language:English
Subjects:
BEAMS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISPERSION RELATIONS
ELECTRON BEAMS
ENERGY RANGE
FREE ELECTRON LASERS
INSTABILITY
LASERS
LEPTON BEAMS
MAGNETIC FIELDS
PARTICLE BEAMS
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
RELATIVISTIC RANGE
RESONANCE
STABILITY
TWO-STREAM INSTABILITY
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Summary:A dispersion relation for the plasma loaded free-electron laser (FEL), with a helical wiggler and an axial magnetic field is derived. The cold fluid formulation is used with self-fields of the electron beam taken into account. By solving the dispersion relation numerically the influence of self-fields on the FEL resonance and the two-stream instability is investigated. It was found that although self-fields have strong effect on the FEL resonance, their effects on the two-stream instability is much weaker.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3520664