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Stoneking, M.R.; Lanier, N.E.; Prager, S.C.; Sarff, J.S.; Sinitsyn, D.
Wisconsin Univ., Madison, WI (United States). Dept. of Physics. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1996
Wisconsin Univ., Madison, WI (United States). Dept. of Physics. Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1996
AbstractAbstract
[en] Current profile control is employed in the Madison Symmetric Torus reversed field pinch to reduce the magnetic fluctuations responsible for anomalous transport. An inductive poloidal electric field pulse is applied in the sense to flatten the parallel current profile, reducing the dynamo fluctuation amplitude required to sustain the equilibrium. This technique demonstrates a substantial reduction in fluctuation amplitude (as much as 50%), and improvement in energy confinement (from 1 ms to 5 ms); a record low fluctuation (0.8%) and record high temperature (615 eV) for this device were observed simultaneously during current drive experiments. Plasma beta increases by 50% and the Ohmic input power is three times lower. Particle confinement improves and plasma impurity contamination is reduced. The results of the transient current drive experiments provide motivation for continuing development of steady-state current profile control strategies for the reversed field pinch
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Dec 1996; 30 p; CONTRACT FG02-96ER54345; Also available from OSTI as DE97002714; NTIS; US Govt. Printing Office Dep
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