Weakly magnetized, Hall dominated plasma Couette flow
K. Flanagan, J. Milhone, J. Egedal, D. Endrizzi, J. Olson, E. E., Peterson, R. Sassella, C. B. Forest
TL;DR
This paper reports on a novel plasma equilibrium in the high-beta, Hall regime that produces high Mach number Couette flow driven by a weak magnetic field, with significant magnetic field amplification and expulsion observed.
Contribution
It introduces a new plasma equilibrium in the high-beta, Hall regime with unique flow and magnetic field behaviors not previously documented.
Findings
Magnetic field amplification by a factor of 20 due to the Hall effect.
Near perfect magnetic field expulsion when flow is reversed.
Dynamic equilibrium between amplified field and density gradients.
Abstract
A novel plasma equilibrium in the high-, Hall regime that produces centrally-peaked, high Mach number Couette flow is described. Flow is driven using a weak, uniform magnetic field and large, cross field currents. Large magnetic field amplification (factor 20) due to the Hall effect is observed when electrons are flowing radially inward, and near perfect field expulsion is observed when the flow is reversed. A dynamic equilibrium is reached between the amplified (removed) field and extended density gradients.
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