Physical Review Letters -- August 1, 1994
Volume 73, Issue 5, pp. 668-671

Time-Resolved Observation of Discrete and Continuous MHD Dynamo in the Reversed-Field Pinch Edge

H. Ji, A.F.Almagri, S.C.Prager, and J.S.Sarff
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706

We report the first experimental verification of the MHD dynamo in the RFP. A burst of magnetohydrodynamic (MHD) dynamo electric field is observed during the sawtooth crash, followed by an increase in the local parallel current in the MST RFP edge. By measuring each term, the parallel MHD mean-field Ohm's law is observed to hold within experimental error bars both between and during sawtooth crashes.

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