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Ion streaming instabilities with application to collisionless shock wave structureThe electromagnetic dispersion relation for two counterstreaming ion beams of arbitrary relative strength flowing parallel to a dc magnetic field is derived. The beams flow through a stationary electron background and the dispersion relation in the fluid approximation is unaffected by the electron thermal pressure. Magnetic effects on the ion beams are included, but the electrons are treated as a magnetized fluid. The dispersion relation is solved with a zero net current condition applied and the regions of instability in the k-U space (U is the relative velocity between the two ion beams) are presented. These results are extensions of Kovner's analysis for weak beams. The parameters are then chosen to be applicable for parallel shocks. It is found that unstable waves with zero group velocity in the shock frame can exist near the leading edge of the shock for upstream Alfven Mach numbers greater than 5.5.
Document ID
19740043047
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Golden, K. I.
(Avco Everett Research Laboratory, Inc., Everett; Northeastern University Boston, Mass., United States)
Linson, L. M.
Mani, S. A.
(Avco Everett Research Laboratory, Inc. Everett, Mass., United States)
Date Acquired
August 7, 2013
Publication Date
December 1, 1973
Publication Information
Publication: Physics of Fluids
Volume: 16
Subject Category
Physics, Atomic, Molecular, And Nuclear
Accession Number
74A25797
Funding Number(s)
CONTRACT_GRANT: NASW-2302
Distribution Limits
Public
Copyright
Other

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