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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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.
|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.|
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|Deposited On:||14 Dec 2007|
|Last Modified:||26 Dec 2012 09:47|
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