Current sustainment by synchrotron radiation in a tokamak device

Current drive using anisotropic synchrotron radiation in a tokamak device is considered. A relativistic formulation of the current drive efficiency, which includes both momentum transfer and asymmetric resistivity, is presented. The explicit computation of the current drive efficiency is performed f...

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Bibliographic Details
Published in:The Physics of fluids (1958) 1988-08, Vol.31 (8), p.2300-2309
Main Authors: Fidone, I., Granata, G., Johner, J.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Magnetic confinement and equilibrium
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
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Summary:Current drive using anisotropic synchrotron radiation in a tokamak device is considered. A relativistic formulation of the current drive efficiency, which includes both momentum transfer and asymmetric resistivity, is presented. The explicit computation of the current drive efficiency is performed for a Maxwellian plasma using Trubnikov’s theory of radiation [in R e v i e w s o f P l a s m a P h y s i c s, edited by M. A. Leontovich (Consultants Bureau, New York, 1979), Vol. 7, p. 345]. The effect of the various synchrotron harmonics on the total generated current is examined, and it is shown that most of the contribution comes from a few harmonics near n=ω/ω c ≫1 for which the corresponding resonant velocities are in the same direction. The general properties of the synchrotron radiation and its capability to generate current in a reactor are also briefly discussed.
ISSN:0031-9171
2163-4998
DOI:10.1063/1.866630