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Observation of large-amplitude ion acoustic solitary waves in a plasma

Published online by Cambridge University Press:  13 March 2009

Yoshiharu Nakamura
Yoshiharu Nakamura
Affiliation:
Institute of Space and Astronautical Science, Komaba, Meguro-ku, Tokyo 153, Japan
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Abstract

Propagation of nonlinear ion acoustic waves in a multi-component plasma with negative ions is investigated in a double-plasma device. When the density of negative ions is larger than a critical value, a broad negative pulse evolves to rarefactive solitons, and a positive pulse whose amplitude is less than a certain threshold value becomes a subsonic wave train. In the same plasma, a positive pulse whose amplitude is larger than the threshold develops into a solitary wave. The critical amplitude is measured as a function of the density of negative ions and compared with predictions of the pseudo-potential method. The energy distribution of electrons in the solitary wave is also measured.

Type
Research Article
Information
Journal of Plasma Physics , Volume 38 , Issue 3 , December 1987 , pp. 461 - 471
Copyright
Copyright © Cambridge University Press 1987

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