Azimuthal Plasmoid Motion in a Coaxial Source withBzBias
作者:
David M. Wetstone,
Isaac Greber,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1964)
卷期:
Volume 7,
issue 11
页码: 35-40
ISSN:0031-9171
年代: 1964
DOI:10.1063/1.1711087
出版商: AIP
数据来源: AIP
摘要:
Photographic evidence is presented for the presence of an azimuthal component of the plasmoid motion in a coaxial source of small aspect ratio when operated with an appliedBzfield comparable in magnitude to the mean, self‐inducedB&thgr;field. The series of displaced images obtained suggests that the rotation is of the correct sense, and that restrikes of the source rotate in alternate directions with the current reversal in the source every half‐wave. Photographs taken without bias field confirm the fact that the plasmoid does not form a continuous torus, and the theoretical consequences of this upon the simple hydromagnetic model are examined. This model is used also to derive an approximate equation of azimuthal motion which predicts an amount of rotation about three times larger than that observed. The amount of rotation does, nevertheless, scale with the bias field strength, as predicted by the model.
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