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Title:
Stabilization of Interchange Modes by Rotating Magnetic Fields
Authors:
Guo, H. Y.; Hoffman, A. L.; Milroy, R. D.; Miller, K. E.; Votroubek, G. R.
Affiliation:
AA(Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA), AB(Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA), AC(Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA), AD(Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA), AE(Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA)
Publication:
Physical Review Letters, vol. 94, Issue 18, id. 185001 (PhRvL Homepage)
Publication Date:
05/2005
Origin:
APS
PACS Keywords:
Field-reversed configurations rotamaks astrons ion rings magnetized target fusion and cusps, Macroinstabilities
DOI:
10.1103/PhysRevLett.94.185001
Bibliographic Code:
2005PhRvL..94r5001G

Abstract

Interchange modes have been a key limiting instability for many magnetic confinement fusion configurations. In previous studies intended to deal with these ubiquitous instabilities, complex, transport enhancing, minimum-B producing coils were added to the otherwise simple linear mirror plasma. Possible solutions for returning to a simple symmetric mirror configuration, such as ponderomotive fields, are weak and difficult to apply. A new method is demonstrated here for the first time, utilizing rotating magnetic fields that are simple to apply and highly effective. A simple and easily comprehensible theory has also been developed to explain the remarkable stabilizing properties. Although this work has been performed on field reversed configurations, it should have a wide application to other confinement schemes, and could become a cornerstone for high-β plasma stability.
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