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TM mode radiation guiding in an REB-induced plasma duct

Published online by Cambridge University Press:  13 March 2009

Jetendra Parashar  and
Lalita
Jetendra Parashar
Affiliation:
Center for Energy Studies, Indian Institute of Technology, Delhi, New Delhi 110016, India
Lalita
Affiliation:
Physics Department, Indian Institute of Technology, Delhi, New Delhi 110016, India
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Abstract

An intense relativistic electron beam propagating through a plasma creates a low-density plasma duct capable of guiding a free-electron laser mode. The beam dynamics plays an important role in the propagation of TM modes. For (where and are the beam and plasma densities respectively, and a and b are the x and y dimensions of the duct) and beam energy of about 2 MeV, the threshold current turns out to be about 20 kA. For marginal radiation guiding, the size of the plasma duct decreases with beam voltage. Application of a strong DC magnetic field shows that an even narrower duct can guide high-frequency radiation.

Type
Research Article
Information
Journal of Plasma Physics , Volume 55 , Issue 3 , June 1996 , pp. 387 - 394
Copyright
Copyright © Cambridge University Press 1996

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