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Experiment of non-local effect with SMBI on HL-2A

Hong-Juan Sun, Xuan-Tong Ding, Liang-Hua Yao, Bei-Bin Feng, Ze-Tian Liu, Xu-Ru Duan, Qing-Wei Yang2010年Plasma Physics and Controlled FusionIF 2.2出版社

Non-local transport phenomena induced by supersonic molecular beam injection (SMBI) have been observed for the first time in the HL-2A tokamak in low density discharges. For low densities (less than 2.0 × 1019 m−3), besides the similarities with the phenomena induced by other methods in various tokamaks, the results on HL-2A show some experimental progress in this effect: the duration of the core Te rise induced by SMBI in HL-2A could be prolonged by changing the conditions of SMBI; both the bolometer radiation and the Hα emission decrease when the non-local effect appears in low density. A repetitive non-local effect can be induced by periodical SMBs. Experimental and calculation results suggest that an electron transport barrier is formed at the position outside the q = 1 surface when the non-local phenomena appear.

日本語訳

非局所輸送現象は、HL-2Aトカマクの低密度放電において、超音速分子ビーム入射(SMBI)によって誘起されることが初めて観測された。低密度(2.0 × 10¹⁹ m⁻³未満)において、他のトカマクで様々な方法により誘起された現象との類似点に加え、HL-2Aでの結果はこの効果に関するいくつかの実験的進展を示している:SMBIの条件を変えることにより、SMBIによって誘起されるコア電子温度(Te)上昇の持続時間を延長できること、非局所効果が現れる低密度時にはボロメータ放射とHα放射の両方が減少すること、そして周期的なSMBIにより非局所効果が繰り返し誘起され得ることである。実験結果と計算結果は、非局所現象が現れるとき、q = 1面の外側に電子輸送障壁が形成されることを示唆している。

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