Correlation between Low-Frequency Fluctuations and Plasma Stored Energy in GAMMA 10

Yoshiaki MIYATA; Masayuki YOSHIKAWA; Fumiaki YAGUCHI; Makoto ICHIMURA; Tatsuya MURAKAMI; Tsuyoshi IMAI

doi:10.1585/pfr.5.033

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Correlation between Low-Frequency Fluctuations and Plasma Stored Energy in GAMMA 10

Yoshiaki MIYATA, Masayuki YOSHIKAWA, Fumiaki YAGUCHI, Makoto ICHIMURA, Tatsuya MURAKAMI, Tsuyoshi IMAI

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Keywords: gold neutral beam probe, drift-type fluctuation, potential fluctuation, density fluctuation, radial particle transport

JOURNAL FREE ACCESS

2010 Volume 5 Pages 033

DOI https://doi.org/10.1585/pfr.5.033

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Abstract

The instabilities observed in many magnetic confinement devices induce radial particle transport. Density and potential fluctuations were measured using a gold neutral beam probe in GAMMA 10. The plasma stored energy repeatedly increases and decreases during ion- cyclotron range of frequency heating. A drift-type fluctuation was observed in both the density and the potential as the plasma stored energy decreased. These results indicated a correlation between the radial particle transport induced by drift-type fluctuations and decreasing plasma stored energy.

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