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The collisionless flow of unmagnetized plasmas around bodies

Published online by Cambridge University Press:  13 March 2009

Bernd Könemann
Bernd Könemann
Affiliation:
Lehrstuhl B für Theoretische Physik der TU Braunschweig, Mondelssohnstr. 1A, D3300 Braunschweig, Germany
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Abstract

The ion density in the wake of extended bodies in collisionless flows of unmagnetized plasmas is qualitatively investigated. Both the deflexion of the ions in a surface potential field, and the collective response of the ambient plasma are incorporated in a model which reveals the connexion between the wakes of extended bodies and those of point charges. The differences between the wake features of small and large bodies in strongly non-isothermal plasmas (Te » Ti) are related to the excitation of different types of waves. In isothermal plasmas no sharp wake features can be expected, because the appropriate waves are heavily damped, and other features are smoothed by the thermal motion of the ions.

Type
Research Article
Information
Journal of Plasma Physics , Volume 20 , Issue 1 , August 1978 , pp. 17 - 30
Copyright
Copyright © Cambridge University Press 1978

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