Nonlinear Theory of Plasma-Beam Superheterodyne Free Electron Laser of Dopplertron Type with Non-Axial Injection of Electron Beam
V.V. Kulisha, A.V. Lysenko b, G.A. Oleksiienko b, V.V. Koval b and M. Yu. Rombovsky b
aNational Aviation University, Department of Theoretical Physics, Kiev, 03058, Ukraine
bSumy State University, Department of General and Theoretical Physics, 40007 Sumy, Ukraine
Received: July 11, 2014; In final form: August 24, 2014
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We have developed a quadratic nonlinear theory of a plasma-beam superheterodyne free electron laser of dopplertron type with the non-axial injection of an electron beam with respect to the guiding magnetic field. It is found out that the studied device can work in four different modes of operation. We determine the modes that have maximum gain coefficients of electromagnetic signals. It is shown that for all the operating modes the amplification factor of an electromagnetic signal is enhanced when the electron beam injection angle is increased.

DOI: 10.12693/APhysPolA.126.1263
PACS numbers: 41.60.Cr