Page 27 - Study of Neutral Gas Pressure Dynamics in C-2W Using Inverted Magnetron Ionization Gauges
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Electrical biasing from divertor electrodes used to rotate SOL plasma, stabilize FRC, ionize gas
Concentric electrodes in divertor vessels generate Er biased up to -3.5 kV near axis so rotation is in electron diamagnetic direction
GDT-style plasma gun mounted behind central orifice.
• Can provide an initial plasma and/or gas source for biasing
Equilibrium rotation is reached when the applied torque is balanced by drag (primarily from neutral ionization and charge-exchange).
Stabilizes azimuthal n=2 FRC deformations which degrade fast ion confinement.
Ionizes and heats mirror plasma surrounding FRC.
Tuszewski, M.; et. al. Physical Review Letters, 2012, 108, 255008 Presenter: Erik Granstedt 27
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