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Ion distributions in the Earth's foreshock upstream from the bow shockA variety of suprathermal and energetic ion distributions are found upstream from shocks. Some distributions, such as field-aligned beams, are generated directly at the shock either through reflection processes or through leakage from the hotter downstream region. Other distributions, such as intermediate distributions, evolve from these parent distributions through wave-particle interactions. This paper reviews our current understanding of the creation and evolution of suprathermal distributions at shocks. Examples of suprathermal ion distributions are taken from observations at the Earth's bow shock. Particular emphasis is placed on the creation of field-aligned beams and specularly reflected ion distributions and on the evolution of these distributions in the Earth's ion foreshock. However, the results from this heavily studied region are applicable to interplanetary shocks, bow shocks at other planets, and comets.
Document ID
19950053618
Document Type
Reprint (Version printed in journal)
Authors
Fuselier, S. A. (Lockheed Palo Alto Research Lab. Paolo Alto, CA, US, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1995
Publication Information
Publication: Advances in Space Research
Volume: 15
Issue: 9-Aug
ISSN: 0273-1177
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS5-31217
Distribution Limits
Public
Copyright
Other

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