NDLI: Ion streaming instabilities with application to collisionless shock wave structure

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Ion streaming instabilities with application to collisionless shock wave structure

Content Provider	NASA Technical Reports Server (NTRS)
Author	Golden, K. I. Mani, S. A. Linson, L. M.
Copyright Year	1973
Description	The 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. 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. The parameters are then chosen to be applicable for parallel shocks. It was 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. It is suggested that this mechanism could generate sufficient turbulence within the shock layer to scatter the incoming ions and create the required dissipation for intermediate strength shocks.
File Size	732054
Page Count	29
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19730015974
Archival Resource Key	ark:/13960/t4tj38q8k
Language	English
Publisher Date	1973-03-01
Access Restriction	Open
Subject Keyword	Shock Waves Magnetic Fields Magnetohydrodynamic Waves Electromagnetic Properties Ion Beams Cyclotron Frequency Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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