Effort of lower hybrid current drive experiments toward to H-mode in EAST
Effort of lower hybrid current drive experiments toward to H-mode in EAST
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EAST 中 H 模式的低混合电流驱动实验的努力
DOI：
10.1088/0029-5515/57/2/022022
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发表时间：
2017-02
期刊：
影响因子：
3.3
通讯作者：
Wan, B. N.
中科院分区：
文献类型：
--
作者：
Zhao, H. L.;Hu, L. Q.;Li, J. G.;Wan, B. N.
低杂波电流驱动(LHCD)是EAST实现高约束(H模)等离子体的有效工具。为了利用LHCD访问H模等离子体，人们一直在努力提高LHW(低混杂波)-等离子体耦合和高密度电流驱动能力。在低杂波激光二极管的EAST运行中，通常采用局部充气和电子侧充气的方法改进低杂波-等离子体耦合。高密度实验表明，在高密度下进行LHCD实验时，首选低循环和高LH频率，这与以前在其他机器上的结果一致。LHCD对EAST电流分布的影响表明，可以通过优化LHW谱来控制等离子体分布。用LHCD获得了可重复的H型等离子体，在2.4 5 GHz和4.6GHz的LH波组合下，H型期间的最大密度可达4.5 × 10 19m−3。
Lower hybrid current drive (LHCD) is an effective tool to achieve high confinement (H-mode) plasma in EAST. To utilize LHCD for accessing H-mode plasma, efforts have been made to improve LHW (lower hybrid wave)-plasma coupling and current drive capability at high density. Improved LHW-plasma coupling by means of local gas puffing and gas puffing from the electron side is routinely used during EAST operation with LHCD. High density experiments suggest that low recycling and high LH frequency are preferred for LHCD experiments at high density, consistent with previous results in other machines. The effect of LHCD on the current profile in EAST demonstrates that it is possible to control the plasma profile by optimizing the LHW spectrum. Repeatable H-mode plasma was obtained by LHCD and the maximum density during H-mode with the combination of 2.45 GHz and 4.6 GHz LH waves was up to 4.5 × 1019 m−3.
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