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Quasi-steady-state ac plasma current operation in HT-7 tokamak

Jiangang Li, Jiarong Luo, Shaojie Wang, Peng Fu, Biao Shen, Fukun Liu, Baonian Wan, Jiafang Shan, Guosheng Xu, Juan Huang2007年被引用 24Nuclear FusionIF 3出版社

A quasi-steady-state alternating current operation assisted by lower hybrid wave (LHW) was achieved on a HT-7 superconducting tokamak with plasma current of Ip = 125 kA, line-averaged density of 1.5 × 1019 m−3, electron temperature of Te = 500 eV and 30–50 s plasma duration. Plasma current was sustained and smoothly transferred from one direction to the other without loss of ionization. Plasma position control, LHW assistance, strong gas puffing and good wall condition are the key issues to have a smooth transition of plasma current. Our modelling results show that current reversal equilibrium configuration with two oppositely flowing currents in the high-field-side and the low-field-side during current reversal exists. This is in agreement with experimental measurements.

日本語訳

準定常状態の交流電流運転が、下部ハイブリッド波(LHW)の支援により、HT-7超伝導トカマクにおいて、プラズマ電流Ip = 125 kA、線平均密度1.5 × 10¹⁹ m⁻³、電子温度Te = 500 eV、プラズマ持続時間30〜50秒で達成された。プラズマ電流は維持され、電離の損失なしに一方の方向から他方の方向へ滑らかに遷移した。プラズマ位置制御、LHW支援、強力なガス入射、および良好な壁状態が、プラズマ電流の滑らかな遷移を実現するための重要な要素である。我々のモデリング結果は、電流反転中に高磁場側と低磁場側に逆向きに流れる2つの電流を有する電流反転平衡配位が存在することを示している。これは実験測定と一致している。

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