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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
Authors/Creators:	Ohnishi, M and Hugrass, WN and Fukuhara, M and Minasali, T
Journal or Publication Title:	Physics of Plasmas
ISSN:	1089-7674
DOI / ID Number:	https://doi.org/10.1063/1.2997341
Item Statistics:	View statistics for this item

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