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Shock normal determination for multiple-ion shocksWe have adapted the single-ion Vinas and Scudder (1986) solution to the Rankine-Hugoniot (R-H) problem to a multiple-on solution. Using this technique, we can calculate a shock normal direction, shock speed, best estimate of the upstream and downstream magnetic field and plasma asymptotic states, and theta(sub Bn), the angle between the shock normal and the upstream magnetic field. We test the multi-ion solution with a theoretical case but are restricted to a perpendicular shock in order to close the multi-ion Rankine-Hugoniot equations. For this test case both single-ion and multi-ion solutions are equally valid. We examine parameter regimes to look for differences between single-ion and multi-ion solutions of the R-H equations, and we find that the largest differences occur for quasi-parallel shocks, small values of solar wind speed, large values of heavy ion density, and very strong and very weak shocks. For both the inbound and outbound crossing of comet Halley we have a slow solar wind speed, small values of water group ions and fairly weak shocks. We examine both the quasi-perpendicular inbound crossing and the quasi-parallel outbound crossing at comet Halley.
Document ID
19950045380
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kessel, R. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Coates, A. J.
(Univ. Coll. of London Holmbury Saint Mary, United Kingdom)
Motschmann, U.
(Technische Univ. Brunswick, Germany)
Neubauer, F. M.
(Cologne Univ. Cologne, Germany)
Date Acquired
August 16, 2013
Publication Date
October 1, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: A10
ISSN: 0148-0227
Subject Category
Astrophysics
Accession Number
95A76979
Funding Number(s)
CONTRACT_GRANT: NAS4-27442
CONTRACT_GRANT: BMFT-01-OF-112-4
CONTRACT_GRANT: NASA ORDER W-15164
Distribution Limits
Public
Copyright
Other

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