NIFS-135

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Author(s): H. Ji, H. Toyama, A. Fujisawa, S. Shinohara and K. Miyamoto Title: Fluctuation and Edge Current Sustainment in a Reversed-Field-Pinch Date of publication: Feb. 1992 Key words: Fluctuation, dynamo effect, Ohm's law, current diffusion, REPUTE-1, RFP Abstract: Simple Ohm's law eta j_|| = E_|| is not satisfied in a/2 is less than or equal to r leq a region of the REPUTE-1 RFP plasma. Fluctuation-induced electric fields, such as <tilda{upsilon} x tilda{B} >, are not sufficient to account for eta j_|| - E_|| at the edge. It is implied that current-diffusions due to magnetic fluctuations, carried by fast electrons rather than bulk cold electrons, sustain the edge parallel equilibrium current.

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