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Adverse Consequences of a Moving Vacuum-Plasma Boundary on Axisymmetric ac Helicity Injection

Bellan, P. M. (1986) Adverse Consequences of a Moving Vacuum-Plasma Boundary on Axisymmetric ac Helicity Injection. Physical Review Letters, 57 (19). pp. 2383-2386. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:BELprl86

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Abstract

The recent prediction of Liewer, Gould, and Bellan that a moving plasma-vacuum boundary significantly lowers the effectiveness of ac helicity injection is generalized by resolution of the apparent discrepancy between the helicity-conservation equations of Jensen and Chu and of Moffatt. It is shown that, if there are axisymmetric circular flux surfaces and a moving vacuum-plasma boundary, then the helicity injected by oscillating fields (if net injection occurs) is simply consumed by an increase in helicity dissipation due to the same oscillating fields.


Item Type:Article
Additional Information:©1986 The American Physical Society. Received 18 June 1986. It is a pleasure to acknowledge useful discussions with R.W. Gould, M.S. Schalit, and P.C. Liewer. This work was supported by the National Science Foundation under Grant No. ECS-8414541.
Record Number:CaltechAUTHORS:BELprl86
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BELprl86
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.57.2383
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9346
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:14 Dec 2007
Last Modified:26 Dec 2012 09:47

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