A computational study of ion cyclotron frequency stabilization of them=1 interchange mode in mirror geometry
作者:
J. R. Myra,
D. A. D’Ippolito,
G. L. Francis,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1987)
卷期:
Volume 30,
issue 1
页码: 148-159
ISSN:0031-9171
年代: 1987
DOI:10.1063/1.866163
出版商: AIP
数据来源: AIP
摘要:
A cylindrical plasma model is used to study the stabilizing effect of electromagnetic ion cyclotron frequency range (ICRF) waves on them=1 magnetohydrodynamic interchange mode. The fast wave eigenmodes of the column and the near‐field antenna pattern are calculated numerically for a diffuse plasma profile when &ohgr;>&OHgr;i. The resulting ponderomotive force and sideband contributions to global interchange stability are then determined using a rigid shift trial function. For far‐field stabilization it is verified that the direct ponderomotive and sideband contributions cancel exactly as the conducting wall supporting the fast wave eigenmode moves out to infinity. The near‐field stabilization effect is related numerically to the drivenk∥spectrum of the waves and their radial profiles. The numerical model is employed to calculate threshold ICRF wave amplitudes for the stabilization experiments in the Phaedrus tandem mirror [Phys. Rev. Lett.51, 1955 (1983)].
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