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Plasma potential fluctuations and large quasi-coherent modes observed by a heavy ion beam probe on the JIPP T-IIU tokamak

Y Haniada, A Nishizawa, Y Kawasumi, A Fujisawa, H Iguchi1997年Fusion Engineering and DesignIF 1.7出版社

AbstractWe observed, in the signals of the plasma potential fluctuation, large-scale oscillations of large energy change in the secondary beam of an HIBP on the JIPP T-IIU tokamak. The frequency is around 10–40 kHz and the amplitude is 10–100 V. It is also found that the coherence of the energy change and the toroidal deflection is very high (0.6), implying that they are; caused by the magnetic oscillations. In spite of the oscillations, we obtained stable values for the correlation between the density and local electric field, which are proportional to the turbulence-driven particle flux.

日本語訳

我々は、HIBPによる二次ビーム中のプラズマ電位揺動において、大規模なエネルギー変化を伴う大規模振動を観測した。JIPP T-IIUトカマクにおける周波数は約10〜40 kHz、振幅は10〜100 Vである。また、エネルギー変化とトロイダル方向の偏向のコヒーレンスが非常に高い(0.6)ことも見出され、これは磁気振動に起因することを示唆している。この振動にもかかわらず、密度と局所電場の間の相関について安定した値を得ることができ、これらは乱流駆動粒子フラックスに比例する。

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Ion beamsPlasma potentialHeavy ion beamJIPPIon beam probeT-IIU
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