Published November 10, 1986
| Published
Journal Article
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Adverse Consequences of a Moving Vacuum-Plasma Boundary on Axisymmetric ac Helicity Injection
- Creators
-
Bellan, P. M.
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.
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.Attached Files
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Additional details
- Eprint ID
- 9346
- Resolver ID
- CaltechAUTHORS:BELprl86
- ECS-8414541
- NSF
- Created
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2007-12-14Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field