Isorotation and differential rotation in a magnetic mirror with imposed E×B rotation

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072501_1_online.pdf (1.59 MB)

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https://pubs.aip.org/aip/pop/article-abstract/19/7/072501/109247/Isorotation-and-differential-rotation-in-a?redirectedFrom=fulltext

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https://doi.org/10.1063/1.4731729
 http://hdl.handle.net/11603/31398

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UMBC Mechanical Engineering Department

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Author/Creator ORCID

https://orcid.org/0000-0002-6830-3126

Date

2012-07-03

Type of Work

journal articles
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Citation of Original Publication

C. A. Romero-Talamás, R. C. Elton, W. C. Young, R. Reid, R. F. Ellis; Isorotation and differential rotation in a magnetic mirror with imposed E×B rotation. Phys. Plasmas 1 July 2012; 19 (7): 072501. https://doi.org/10.1063/1.4731729

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in C. A. Romero-Talamás, R. C. Elton, W. C. Young, R. Reid, R. F. Ellis; Isorotation and differential rotation in a magnetic mirror with imposed E×B rotation. Phys. Plasmas 1 July 2012; 19 (7): 072501. https://doi.org/10.1063/1.4731729 and may be found at https://pubs.aip.org/aip/pop/article-abstract/19/7/072501/109247/Isorotation-and-differential-rotation-in-a?redirectedFrom=fulltext.

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Abstract

Doppler spectroscopy of helium impurities in the Maryland Centrifugal Experiment reveals the simultaneous existence of isorotating and differentially rotating magnetic surfaces. Differential rotation occurs at the innermost surfaces and is conjectured to cause plasma voltage oscillations of hundreds of kilohertz by periodically changing the current path inductance. High-speed images show the periodic expulsion of plasma near the mirror ends at the same frequencies. In spite of this, the critical ionization velocity limit is exceeded, with respect to the vacuum field definition, for at least 0.5 ms.