Electron beam radiation by collective Compton boosting of strong turbulence

Several strong relativistic beam–plasma experiments have found powerful broadband microwave emission far above the plasma line. To model these experiments, consider scattering of electrons by cavitons of plasma turbulence of size D. This yields radiation Compton boosted to frequencies ∼2γ2 c/D and r...

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Bibliographic Details
Published in:Physics of fluids. B, Plasma physics Plasma physics, 1992-12, Vol.4 (12), p.4111-4120
Main Authors: Benford, Gregory, Weatherall, James C.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340 > Plasma Waves, Oscillations, & Instabilities-- (1992-)
BASIC INTERACTIONS
BEAM-PLASMA SYSTEMS
BEAMS
COMPTON EFFECT
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY RANGE
Exact sciences and technology
INTERACTIONS
LEPTON BEAMS
MICROWAVE RADIATION
PARTICLE BEAMS
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma interactions (nonlaser)
RADIATIONS
RELATIVISTIC RANGE
SCATTERING 700350 > Plasma Production, Heating, Current Drive, & Interactions-- (1992-)
TURBULENCE
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Summary:Several strong relativistic beam–plasma experiments have found powerful broadband microwave emission far above the plasma line. To model these experiments, consider scattering of electrons by cavitons of plasma turbulence of size D. This yields radiation Compton boosted to frequencies ∼2γ2 c/D and relativistically beamed. To attain the observed powers (up to 108 W) the beam must be bunched. Several models for beam density fluctuation statistics can give the observed power, but only broad distributions, such as a Gaussian electrostatic spectrum in k, can yield a qualitatively wide radiation spectrum. Power scalings can be checked in future experiments.
ISSN:0899-8221
2163-503X
DOI:10.1063/1.860318