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Author(s):
Y. Miura, F. Okano, N. Suzuki, M. Mori, K. Hoshino, H. Maeda, T. Takizuka, JFT-2M Group, K. Itoh and S.-I. Itoh
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Title:
Ion Heat Pulse after Sawtooth Crash in the JFT-2M Tokama
Date of publication:
Aug. 1993
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Key words:
Heat Pulse Propagation, Ion Energy Loss, Sawtooth, Time-of-Flight Measurement, Neutral Particles
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Abstract:
The ion heat pulse after sawtooth crash is studied with the time-of-flight neutral measurement on the JFT-2M tokamak. The rapid change of the bulk ion energy distribution near the edge is observed after sawtooth crash. The delay time is measured and the effective measurlng position is estimated by a neutral transport code, then the thermal-conductivity, X_i^HP of about 15pml0m^2/sec is evaluated for the L-mode plasma . The simple diffusive model with constant X_i^HP, however does not explain the amplitude of the pulse in the ion energy distribution.
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