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Sarff, J.S.; Almagri, A.F.; Cekic, M.
Wisconsin Univ., Madison, WI (United States). Plasma Physics Research. Funding organisation: USDOE, Washington, DC (United States)1994
Wisconsin Univ., Madison, WI (United States). Plasma Physics Research. Funding organisation: USDOE, Washington, DC (United States)1994
AbstractAbstract
[en] An auxiliary poloidal inductive electric field applied to a reversed field pinch (RFP) plasma reduces the current density gradient, slows the growth of m = 1 tearing fluctuations, suppresses their associated sawteeth, and doubles the energy confinement time. This experiment attacks the dominant RFP plasma loss mechanism of parallel streaming in a stochastic magnetic field. The auxiliary electric field flattens the current profile and reduces the magnetic fluctuation level. Since a toroidal flux change linking the plasma is required to generate the inductive poloidal electric field, the current drive is transient to avoid excessive perturbation of the equilibrium. To sustain and enhance the improved state, electrostatic and RF current drivers are being developed. A novel electrostatic current drive scheme uses a plasma source for electron injection, and the lower-hybrid wave is a good candidate for RF current drive
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Nov 1994; 28 p; CONTRACT FG02-85ER53198; Also available from OSTI as DE95007016; NTIS; US Govt. Printing Office Dep
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