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Strong Langmuir turbulence generated by electron beams - Electric-field distributions and electron scatteringStrong turbulence and transit-time scattering theory are applied here to calculate the statistical distribution of intense Langmuir fields and the consequent beam scattering in plasma turbulence driven by an electron beam. The experimentally observed electric-field distributions are compared with predictions of strong-turbulence theory, concentrating on the wave levels, the Gaussian tail of the high-field distribution observed in one experiment, the arrest scale of collapse, and the fractional volume occupied by the highest fields. The Guassian form of the tail is confirmed, and the results imply that the collapse is arrested at a scale where the peak electrostatic energy density is of the same order as the thermal energy density. The theory of transit-time interactions is generalized to include relativistic particle dynamics and is applied to predict the scattering of the beam electrons in energy and angle as they pass through strong Langmuir turbulence. The results support the validity of the recently developed scaling theory of strong turbulence.
Document ID
19910033510
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Robinson, P. A.
(Sydney, University Australia)
Newman, D. L.
(Colorado, University Boulder, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1990
Publication Information
Publication: Physics of Fluids B
Volume: 2
ISSN: 0899-8221
Subject Category
Plasma Physics
Accession Number
91A18133
Funding Number(s)
CONTRACT_GRANT: NSF ATM-88-13255
CONTRACT_GRANT: NAGW-91
CONTRACT_GRANT: NSG-7287
Distribution Limits
Public
Copyright
Other

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