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Penetration and radial force balance in field-reversed configuration with large rotating magnetic field

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Ohnishi, M and Hugrass, WN and Fukuhara, M and Minasali, T (2008) Penetration and radial force balance in field-reversed configuration with large rotating magnetic field. Physics of Plasmas, 15. pp. 104504-104507. ISSN 1089-7674

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Abstract

A field-reversed configuration FRC is formed by applying a rotating magnetic field RMF much larger than the axial magnetic field to a cylindrical glass vacuum chamber filled with 10 Pa argon gas without a preionization. The FRC with the plasma density 2.21019 m−3, the temperature 8.0 eV, the separatrix length 0.45 m, and the separatrix radius 0.035 m is sustained for the notably long period of 40 ms. It is observed that the antenna current which produces the RMF is reduced by about half after the FRC is formed. The interaction between the plasma and the antenna circuit increases the antenna resistance and changes the inductance of the antenna so that the circuit becomes nonresonant. The RMF is sufficiently large to fully penetrate to the center during the period and drive the current with a rigid rotor profile. The RMF is shown to play a major role in sustaining the plasma pressure. © 2008 American Institute of Physics.

Item Type: Article
Journal or Publication Title: Physics of Plasmas
Page Range: pp. 104504-104507
ISSN: 1089-7674
Identification Number - DOI: 10.1063/1.2997341
Date Deposited: 22 Oct 2008 04:36
Last Modified: 18 Nov 2014 03:52
URI: http://eprints.utas.edu.au/id/eprint/7846
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