Evaporated lithium surface coatings in NSTX-猫眼课题宝

DOI：

10.1016/j.jnucmat.2009.01.262

发表时间：

2009-06

期刊：

Journal of Nuclear Materials

影响因子：

3.1

通讯作者：

中科院分区：

工程技术2区

文献类型：

作者：

H. Kugel;D. Mansfield;R. Maingi;M. Bell;R. Bell;J. Allain;D. Gates;S. Gerhardt;R. Kaita;J. Kallman;S. Kaye;B. LeBlanc;R. Majeski;J. Menard;D. Mueller;M. Ono;S. Paul;R. Raman;A. Roquemore;P. Ross;S. Sabbagh;H. Schneider;C. Skinner;V. Soukhanovskii;T. Stevenson;J. Timberlake;W. Wampler;J. Wilgren;L. Zakharov

使用两个锂蒸发器将超过100g的锂蒸发到NSTX下导流器区域。在每次排放之前，蒸发器被撤回到百叶窗后面，在随后的HeGDC应用期间，蒸发器也保持在那里，最长可达9.5分钟。HeGDC完成后，打开百叶窗，重新插入升液，以10-70mg /min的速率将锂沉积在下部分流器靶上10min，然后再进行下一次放电。这些锂沉积对等离子体性能的主要改善包括：(1)锂沉积降低了等离子体密度；(2)抑制ELMs；(3)低三角形状的能量约束改进；(4)提高标准、高三角度放电的等离子体性能；(5)减少HeGDC放电间隔时间；(6)底座电子、离子温度升高；(7)溶胶等离子体密度降低；(8)降低了边缘中性密度。

Two lithium evaporators were used to evaporate more than 100g of lithium on to the NSTX lower divertor region. Prior to each discharge, the evaporators were withdrawn behind shutters, where they also remained during the subsequent HeGDC applied for periods up to 9.5min. After the HeGDC, the shutters were opened and the LITERs were reinserted to deposit lithium on the lower divertor target for 10min, at rates of 10–70mg/min, prior to the next discharge. The major improvements in plasma performance from these lithium depositions include: (1) plasma density reduction as a result of lithium deposition; (2) suppression of ELMs; (3) improvement of energy confinement in a low-triangularity shape; (4) improvement in plasma performance for standard, high-triangularity discharges; (5) reduction of the required HeGDC time between discharges; (6) increased pedestal electron and ion temperature; (7) reduced SOL plasma density; and (8) reduced edge neutral density.

Evaporated lithium surface coatings in NSTX

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