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Measurement of the current-density profile and plasma dynamics in the reversed-field pinch
D L Brower1, W X Ding, S D Terry
1Electrical Engineering Department, University of California at Los Angeles, Los Angeles, CA 90095, USA.
Physical Review Letters
|May 15, 2002
Abstract:
First measurements of the current-density profile in the core of a high-temperature reversed-field pinch are presented. The current-density profile is observed to peak during the sawtooth cycle and broaden promptly at the crash. This change in profile can be linked to magnetic relaxation and the dynamo which is predicted to drive antiparallel current in the plasma core. For high-confinement discharges, the dynamo is suppressed and the current-density profile is observed to strongly peak.