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Ion heating by lower hybrid wave in the HT-7 tokamak

S X Liu, B N Wan, G L Kuang, X Gao, L Q Hu, P J Qin, Y J Shi, J G Li, J K Xie, the HT-7 Team2001年Plasma Physics and Controlled FusionIF 2.2出版社

Lower hybrid wave (LHW) heating has been investigated in the HT-7superconducting tokamak. It has been observed that the plasma performance isobviously enhanced by LHW heating. The ion temperature was increased by0.4 keV and the electron temperature by 0.3 keV. Meanwhile the centralline-averaged electron density was increased from 1×1019 to2.6×1019 m-3. The high-energy ion tail produced by the LHWwas observed from the charge-exchange spectra measured by neutral particleanalysis. An ion heating efficiency of (2-3) ×1013 eV kW-1 cm-3 was obtained in the experiments. The evolution of theprofiles of ion temperature shows clearly an off-axis ion heating by LHW,which is in agreement with code simulations.

日本語訳

低ハイブリッド波(LHW)加熱がHT-7超伝導トカマクにおいて研究された。LHW加熱によりプラズマ性能が明らかに向上することが観測された。イオン温度は0.4 keV、電子温度は0.3 keV増加した。一方、中心線平均電子密度は1×10¹⁹から2.6×10¹⁹ m⁻³へ増加した。LHWによって生成された高エネルギーイオンテールは、中性粒子分析による荷電交換スペクトルから観測された。実験においてイオン加熱効率(2-3)×10¹³ eV kW⁻¹ cm⁻³が得られた。イオン温度分布の時間発展は、LHWによるオフアクシスイオン加熱を明確に示しており、これはコードシミュレーションと一致している。

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Lower hybridIon heatingHT-7
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