Parametric up-conversion of electromagnetic waves by a gyrating relativistic electron beam

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871514· OSTI ID:383798

James, L; Jassal, L; Tripathi, V K ^[1]

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1. Department of Physics, IIT Delhi Hauz khas, New Delhi-16 (India)

A gyrating relativistic electron beam supports negative energy modes near the harmonics of the electron cyclotron frequency. An electromagnetic wave passing through such a beam parametrically up-converts into high frequency electromagnetic radiation, producing a beam cyclotron mode. In the case when pump frequency {omega}{sub 0} is away from the harmonics of cyclotron frequency, {omega}{ne}{ital l}{omega}{sub {ital c}}/{gamma}{sub 0} and {omega}{gt}{omega}{sub {ital c}}/{gamma}{sub 0}, the beam response to the pump and sideband waves is obtained by the fluid theory whereas the response at the beam cyclotron mode is kinetic. In the case when {omega}{sub 0}{approximately}{ital l}{omega}{sub {ital c}}/{gamma}{sub 0} the beam response to all three interacting waves is taken to be fully kinetic. It is seen that the normalized growth rate decreases as {omega}{sub 0}{minus}{omega}{sub {ital c}}/{gamma}{sub 0} increases for Raman as well as Compton regimes of operation. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 383798
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYCLOTRON HARMONICS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON CYCLOTRON-RESONANCE
FREE ELECTRON LASERS
RELATIVISTIC RANGE