Plasma Heating with Strong Poloidal Ohmic Currents
D. J. Holly, S. C. Prager, and J. C. Sprott
University of Wisconsin, Madison,
Wisconsin 53706, U.S.A.
(Received 27 July 1982; accepted 14 July 1983)
The feasibility of using strong poloidal currents to heat plasmas has been
examined experimentally in Tokapole II, operating as a toroidal octupole.
The plasma resistivity ranges from that of Spitzer to about 1500 times
Spitzer resistivity, as predicted by mirror-enhanced resistivity theory.
This allows large powers (approximately 2 MW) to be coupled to the plasma
at modest current levels. However, the confinement time is reduced by the
heating, apparently due to a combination of the input power location (near
the walls of the vacuum tank) and fluctuation-enhanced transport.
Ref: D. J. Holly, S. C. Prager, and J. C. Sprott,
Phys. Fluids 26, 3435-3439 (1983)
The complete paper is available in PDF format.
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