Stabilization of Interchange Modes by Rotating Magnetic Fields

H. Y. Guo, A. L. Hoffman, R. D. Milroy, K. E. Miller, and G. R. Votroubek
Phys. Rev. Lett. 94, 185001 – Published 11 May 2005

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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  • Received 25 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.185001

©2005 American Physical Society

Authors & Affiliations

H. Y. Guo, A. L. Hoffman, R. D. Milroy, K. E. Miller, and G. R. Votroubek

  • Redmond Plasma Physics Laboratory, University of Washington, Seattle, Washington 98195, USA

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Issue

Vol. 94, Iss. 18 — 13 May 2005

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