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Electromagnetic radiation from beam-plasma instabilitiesA computer simulation is developed for the generation of electromagnetic radiation in an electron beam-plasma interaction. The plasma is treated as a two-dimensional finite system, and effects of a continuous nonrelativistic beam input are accounted for. Three momentum and three field components are included in the simulation, and an external magnetic field is excluded. EM radiation generation is possible through interaction among Langmuir oscillations, ion-acoustic waves, and the electromagnetic wave, producing radiation perpendicular to the beam. The radiation is located near the plasma frequency, and polarized with the E component parallel to the beam. The scattering of Langmuir waves caused by ion-acoustic fluctuations generates the radiation. Comparison with laboratory data for the three-wave interactions shows good agreement in terms of the radiation levels produced, which are small relative to the plasma thermal energy.
Document ID
19830048904
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pritchett, P. L.
Dawson, J. M.
(California, University Los Angeles, CA, United States)
Date Acquired
August 11, 2013
Publication Date
April 1, 1983
Publication Information
Publication: Physics of Fluids
Volume: 26
ISSN: 0031-9171
Subject Category
Plasma Physics
Accession Number
83A30122
Funding Number(s)
CONTRACT_GRANT: NSF PHY-80-26048
CONTRACT_GRANT: DE-AM03-76SF-00010-PA-26
CONTRACT_GRANT: NAGW-78
Distribution Limits
Public
Copyright
Other

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