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Positional stability of field-reversed-configurations in the presence of resistive walls (2016)

N. Rath, M. Onofri and D. C. Barnes

American Institute of Physics (AIP)

In: Physics of Plasmas

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Publication Date: 2016-06-25

Description: We show that in a field-reversed-configuration, the plasma is unstable to either transverse or axial rigid displacement, but never to both. Driving forces are found to be parallel to the direction of displacement with no orthogonal components. Furthermore, we demonstrate that the properties of a resistive wall (geometry and resistivity) in the vicinity of the plasma do not affect whether the plasma is stable or unstable, but in the case of an unstable system determine the instability growth rate. Depending on the properties of the wall, the instability growth is dominated by plasma inertia (and not affected by wall resistivity) or dominated by ohmic dissipation of wall eddy currents (and thus proportional to the wall resistivity).

Print ISSN: 1070-664X

Electronic ISSN: 1089-7674

Topics: Physics

Published by American Institute of Physics (AIP)

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