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The interaction of high- and low-frequency waves in a free electron laser

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2 Author(s)
Latham, P.E. ; Lab. for Plasma Res., Maryland Univ., College Park, MD, USA ; Levush, B.

When a free electron laser (FEL) interaction occurs inside a waveguide, there are two possible operating frequencies at the two intersections of the beam line with the waveguide dispersion curve. Using a one-dimensional model valid for a low-gain oscillator, the mode competition between the high- and low-frequency waves is studied. It is found that the low-frequency wave can be nonlinearly suppressed, even when its linear growth rate is positive. When the frequency ratio is two, phase locking occurs and the nonlinear gain of the low-frequency wave can exceed its linear growth rate

Published in:

Plasma Science, IEEE Transactions on  (Volume:18 ,  Issue: 3 )

Date of Publication:

Jun 1990

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