Kinetic description of a plasma-loaded free-electron laser

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2734577· OSTI ID:20975008

Babaei, S; Maraghechi, B ^[1]

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1. Department of Physics, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran (Iran, Islamic Republic of)

A kinetic theory is used to find the dispersion relation of a plasma-loaded free-electron laser that takes into account the velocity spread of both beam and plasma electrons. For the weak-coupling regime, the dispersion relation for a cold electron beam and plasma is obtained and is studied numerically. The kinetic theory predicts that, for the cold beam and plasma, plasma density increases the growth rate of the higher-frequency resonance and lowers it for the lower-frequency resonance up to a certain plasma density. By increasing the plasma density further, a critical density will be reached that diminishes the instability.

• OSTI ID: 20975008
• Journal Information: Physics of Plasmas, Vol. 14, Issue 5; Other Information: DOI: 10.1063/1.2734577; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
DISPERSION RELATIONS
ELECTRON BEAMS
ELECTRONS
FREE ELECTRON LASERS
PLASMA
PLASMA DENSITY
PLASMA INSTABILITY
RESONANCE