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Microwave generation by intense relativistic electron beams propagating in a circular waveguide

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5 Author(s)
Etlicher, B. ; Laboratoire de Physique des Milieux Ionisés, Ecole Polytechnique, 91128 Palaiseau, France ; Huetz, A. ; Buzzi, J.M. ; Haldenwang, P.
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The stability of circular waveguide modes perturbed by a relativistic electron beam is investigated. The electron beam propagates along the waveguide and is guided by an applied uniform axial magnetic field. The electron beam is represented by a distribution of rigid rotators all having the same energy and Larmor radius rL with their guiding centers centered on a circle or radius Rb around the guide axis. Numerical results are presented giving a general view of the competition between synchronous and cyclotron instabilities for TM and TE modes as a function of rL and Rb.

Published in:

Journal of Applied Physics  (Volume:51 ,  Issue: 1 )