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Observation of internal kink instability purely driven by suprathermal electrons in the HL-1M tokamak

X.T. Ding, Yi. Liu, G.C. Guo, E.Y. Wang, K.L. Wong, L.W. Yan, J.Q. Dong, J.Y. Cao, Y. Zhou, J. Rao2002年被引用 56Nuclear FusionIF 3出版社

Strong m = 1 MHD activities are observed in the HL-1M tokamak during off-axis electron cyclotron resonance heating (ECRH) when the cyclotron resonance location is placed just outside the q = 1 surface at the high-magnetic-field side of the magnetic surface. Addition of lower-hybrid waves to ECRH significantly enhances the MHD excitation, but lower-hybrid waves alone cannot excite or sustain the mode. This result is a clear demonstration of the suprathermal trapped electron effect on the instability because of the absence of energetic ions in the plasma.

日本語訳

強力なm=1 MHD活動が、HL-1Mトカマクにおいて、電子サイクロトロン共鳴加熱(ECRH)中に、共鳴位置が磁気面の高磁場側のq=1面のすぐ外側に置かれたときに観測される。ECRHへの低混成波の追加はMHD励起を有意に増強するが、低混成波単独ではモードを励起または維持することはできない。この結果は、プラズマ中に高エネルギーイオンが存在しないことから、不安定性に対する超熱的捕捉電子効果の明確な実証である。

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Internal kink mode
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