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Instability of energetic ion beam injection in tokamaks

Published online by Cambridge University Press:  13 March 2009

John D. Gaffey Jr
John D. Gaffey Jr
Affiliation:
Center for Theoretical Physics, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742, U.S.A. and Institute de Fisica, Universidade Federal do Rio Grande do Sul,†90.000 Porto Alegre, Brazil
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Abstract

There is considerable interest in the use of energetic ion beams to heat magnetically confined plasmas to ignition temperature. An uncertainty in this heating technique is the possible role of instabilities driven by the fast ion beams. For this reason, we have investigated homogeneous plasma modes, including the cross field ion-ion wave and the beam ion-acoustic wave, as well as the ordinary electromagnetic mode, which taps the free energy associated with the beam anisotropy. The growth rates of these modes are calculated and the stability thresholds are compared to parameters for both present injection experiments and the proposed TFTR device.

Type
Research Article
Information
Journal of Plasma Physics , Volume 16 , Issue 2 , October 1976 , pp. 171 - 179
Copyright
Copyright © Cambridge University Press 1976

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References

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