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Gas–plasma and superlattice free-electron lasers exploiting a medium with periodically modulated refractive index

Published online by Cambridge University Press:  15 October 2009

V.V. Apollonov ,
A.I. Artemyev ,
M.V. Fedorov ,
J.K. McIver  and
E.A. Shapiro
V.V. Apollonov
Affiliation:
General Physics Institute, Russian Academy of Sciences, Moscow, 117942, Russia
A.I. Artemyev
Affiliation:
General Physics Institute, Russian Academy of Sciences, Moscow, 117942, Russia
M.V. Fedorov
Affiliation:
General Physics Institute, Russian Academy of Sciences, Moscow, 117942, Russia
J.K. McIver
Affiliation:
Center for Advanced Studies, Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
E.A. Shapiro
Affiliation:
General Physics Institute, Russian Academy of Sciences, Moscow, 117942, Russia
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Abstract

Free-electron lasers exploiting media with periodically modulated refractive indices are studied. The regime of large modulation is considered, and the conditions of its realization are discussed. Two types of media with periodically modulated refractive indices are analyzed: a gas-plasma medium with a periodically varying degree of ionization and a superlattice-like medium. The gain, saturation field, and efficiency of these free-electron lasers are found. For any given frequency, the gain is optimized with respect to the choice of electron energy, direction of motion, and other parameters. Its relationship with other types of free-electron lasers (e.g., the Cherenkov laser) is discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 16 , Issue 2 , June 1998 , pp. 267 - 276
Copyright
Copyright © Cambridge University Press 1998

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