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Two-stream whistler-pumped free-electron laser

Published online by Cambridge University Press:  25 September 2014

S. Saviz  and
S. Jafari
S. Saviz*
Affiliation:
Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran 14665-678, Iran
S. Jafari
Affiliation:
Department of Physics, University of Guilan, Rasht 41335-1914, Iran
*
†Email address for correspondence: shahrooz.saviz@srbiau.ac.ir
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Abstract

The theory for the two-stream free-electron laser with the whistler wave as a slow electromagnetic wave wiggler is studied theoretically. The results show that for small values of plasma density, there are seven groups of orbits and the plasma density enhancement leads to increase in the number of trajectories. Also, increasing the plasma density causes growth in the axial velocity for groups (1–4) of orbits and a reduction for groups (6–7). It is shown that for groups (6–7), the effect of plasma is to increase the gain, and for groups (1–4) the effect of plasma is to decrease the gain. For group (1) the effect of plasma is to decrease the maximum frequency and for group (3) it is to increase the maximum frequency.

Type
Research Article
Information
Journal of Plasma Physics , Volume 81 , Issue 2 , April 2015 , 905810212
Copyright
Copyright © Cambridge University Press 2014 

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