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Propagation of the higher-order Landau modes of electron plasma wave

Published online by Cambridge University Press:  13 March 2009

S. Ikezawa ,
Y. Kawai ,
T. Hara ,
Y. Nakamura ,
T. Itoh  and
T. Kawabe
S. Ikezawa
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
Y. Kawai
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
T. Hara
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
Y. Nakamura
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
T. Itoh
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
T. Kawabe
Affiliation:
Institute of Space and Aeronautical Science, University of Tokyo, Kornaba, Meguro-ku Tokyo 153, Japan
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Abstract

Propagation of electrostatic electron waves whose frequency is smaller than the electron plasma frequency in a large unmagnetized plasma is investigated both experimentally and theoretically. When a receiver is close to a transmitter, free-streaming electrons are detected owing to their large capacity for excitation. When the distance between the receiver and the transmitter becomes large, the third-order Landau mode is observed due to its smaller damping than that of free-streaming electrons. Finally, a dip in amplitude of the wave, caused by interference by the higher-order Landau modes, is seen. The results are in reasonable agreement with numerical calculation assuming a dipole excitation for the wave.

Type
Research Article
Information
Journal of Plasma Physics , Volume 17 , Issue 2 , April 1977 , pp. 251 - 257
Copyright
Copyright © Cambridge University Press 1977

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References

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