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Mode conversion of laser radiation in the presense of a magnetic wiggler

Published online by Cambridge University Press:  13 March 2009

Jetendra Parashar ,
H. D. Pandey  and
R. K. Singh
Jetendra Parashar
Affiliation:
Center for Energy Studies, Indian Institute of Technology, New Delhi 110 016, India
H. D. Pandey
Affiliation:
Center for Energy Studies, Indian Institute of Technology, New Delhi 110 016, India
R. K. Singh
Affiliation:
Department of Physics, Barkatullah University, Bhopal 462 026, M.P., India
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Abstract

Laser radiation propagating through a non-uniform plasma along the direction of the density gradient suffers total reflection at the critical layer. However, when a wiggler magnetic field exists near the critical layer, the laser drives a Langmuir wave. For suitable values of Bw and kw, the power transfer from the laser to the Langmuir wave could be as high as 60%. The Langmuir wave deposits its energy on the electrons via Landau damping. This may be an efficient mechanism of laser absorption when large self-generated magnetic fields exist in the plasma.

Type
Research Article
Information
Journal of Plasma Physics , Volume 53 , Issue 3 , June 1995 , pp. 285 - 292
Copyright
Copyright © Cambridge University Press 1995

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