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Two-stream cyclotron radiative instabilities due to the marginally mirror-trapped fraction of fusion alphas in tokamaks

Published online by Cambridge University Press:  01 April 1997

V. ARUNASALAM
V. ARUNASALAM
Affiliation:
Princeton University, Princeton Plasma Physics Laboratory, PO Box 451, Princeton, New Jersey 08543, USA
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Abstract

It is shown here that the marginally mirror-trapped fraction of newly born fusion alpha particles in deuterium–tritium (DT) reaction-dominated tokamak plasmas can induce a two-stream cyclotron radiative instability for fast Alfvén waves propagating near the harmonics of the alpha-particle cyclotron frequency ωcα. This can explain both the experimentally observed temporal behaviour and spatially localized origin of the fusion-product ion cyclotron emission (ICE) in TFTR at frequencies ω≈mωcα.

Type
Research Article
Information
Journal of Plasma Physics , Volume 57 , Issue 3 , April 1997 , pp. 523 - 533
Copyright
1997 Cambridge University Press

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