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Abstract
Plasma performance in the F -Θ pumping condition has been studied on the reversed field pinch (RFP) device ZT-40M. Compared with an un-modulated case, slight changes of plasma parameters are found for the case of current drive phasing. On the other hand, the increases in radiated power and impurity intensity, and the decreases in plasma current and soft X ray intensity are observed for the anti-drive phasing. Changes of effective minor radius, inferred internal structures and phases between various plasma parameters during modulation are also studied. Frequency spectra up to the 10th harmonic of the driving frequency (1.3 and 2 kHz) are investigated. The fast penetration (>10 kHz) of changes of plasma parameters to the central region and the increased impurity and soft X ray intensities with an increase in the frequency are found.
Published Version
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