Schalit, M. A. and Bellan, P. M. (1989) Comments on "Plasma current drive by injection of photons with helicity" [Comm. Plasma Phys. Controlled Fusion 12, 165 (1989)]. Physics of Fluids B, 1 (12). pp. 2533-2534. ISSN 0899-8221 http://resolver.caltech.edu/CaltechAUTHORS:SCHApofb89
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Ohkawa has proposed a tokamak current-drive scheme [Comm. Plasma Phys. Controlled Fusion 12, 165 (1989)], which relies on the injection of circularly polarized magnetohydrodynamic waves. It is shown here that the favorable current-drive efficiency predicted by Ohkawa is not attained because excessive power is dissipated by the fluctuating fields. The ratio of power absorbed by the plasma to the dc Ohmic power required to drive the same current is Pabsorbed/POhmic[approximately-equal-to]4(Ba/b)^2, where Ba is the static toroidal field strength and b is the strength of the fluctuating field.
|Additional Information:||Copyright © 1989 American Institute of Physics. Received 14 February 1989; accepted 3 August 1989.|
|Subject Keywords:||TOKAMAK DEVICES, CURRENT−DRIVE HEATING, POLARIZATION, WAVE PROPAGATION, MAGNETOHYDRODYNAMICS, EFFICIENCY, ENERGY LOSSES, FLUCTUATIONS, ENERGY ABSORPTION, PLASMA, DC SYSTEMS, TOROIDAL CONFIGURATION, PLASMA HEATING|
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|Deposited By:||Archive Administrator|
|Deposited On:||07 Apr 2008|
|Last Modified:||26 Dec 2012 09:56|
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