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Distribution function and diffusion of α-particles in DT fusion plasma

Published online by Cambridge University Press:  13 March 2009

M. A. Liberman  and
A. L. Velikovich
M. A. Liberman
Affiliation:
Institute for Physical Problems, Moscow, USSR
A. L. Velikovich
Affiliation:
Institute for Physical Problems, Moscow, USSR
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Abstract

In the Fokker-Planck approximation, a general solution of the kinetic equation for the distribution function of non-thermal α-particles in spatially uniform DT plasma is obtained. The previously published solutions are then derived as special cases. Transport equations describing diffusion of non-thermal α-particles are obtained and diffusion coefficients are calculated. To compare the hydro-dynamic and kinetic descriptions of non-thermal α-particle energy transport, the critical ignition length of the overheating instability in DT fusion plasma, determined by non-local plasma heating due to α-particle diffusion, is calculated using both approaches. The two results are in good agreement.

Type
Research Article
Information
Journal of Plasma Physics , Volume 31 , Issue 3 , June 1984 , pp. 369 - 380
Copyright
Copyright © Cambridge University Press 1984

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References

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