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Excitation of upper-hybrid waves by a rotating relativistic electron beam in a plasma-filled large-orbit gyrotron

Published online by Cambridge University Press:  01 April 1997

S. C. SHARMA
S. C. SHARMA
Affiliation:
Present address: Plasma Group, Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India Physics Department, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India
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Abstract

A large-orbit gyrotron may operate at higher beam currents if one introduces a plasma in its interaction region. The plasma, however, is unstable to an upper-hybrid electrostatic perturbation driven via cyclotron interaction by the rotating relativistic electron beam. The growth rate of the instability is comparable to the growth rate of the cyclotron maser instability when the plasma frequency is of the order of the electron cyclotron frequency.

Type
Research Article
Information
Journal of Plasma Physics , Volume 57 , Issue 3 , April 1997 , pp. 545 - 553
Copyright
1997 Cambridge University Press

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