The first implementation of active detachment feedback control in EAST PCS

The first implementation of active detachment feedback control in EAST PCS
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首次在 EAST PCS 中实现主动脱离反馈控制

DOI:
10.1016/j.fusengdes.2020.111557
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发表时间:
2020-05
影响因子:
1.7
通讯作者:
Hyatt A.
Hyatt A.
中科院分区:
工程技术3区
文献类型:
--
作者:
Yuan Q. P.;Wu K.;Wang L.;Xu J. C.;Li K. D.;Liu J. B.;Meng L. Y.;Zhan R. R.;Luo Z. P.;Xiao B. J.;Eldon D.;Barr Jayson;Hyatt A.

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2017年,EAST实现了101.2秒H模式放电,总注入功率高达3MW。因此,为了增强辅助加热功率,EAST迫切需要主动偏滤器热流控制。 2018年,主动偏滤器脱离反馈控制在EAST等离子体控制系统(PCS)中成功实施,并使用偏滤器朗缪尔探针测量来评估偏滤器颗粒通量。在 2018 年 EAST 实验期间,控制算法通过使用 SMBI 在低场侧添加 D-2 燃料或从 H 模式等离子体中的偏滤器体积中注入杂质,有效地控制了分离程度,而没有显着降低核心-等离子体性能,即表现出良好的核心-边缘-偏滤器集成。本文将报道算法在PCS中的实现和实验结果。在不久的将来,我们将进一步努力将主动反馈控制扩展到长脉冲H模式脱离维护,这将有利于ITER的高功率H模式运行。
EAST achieved 101.2 seconds H-mode discharge with total power injection up to 3MW in 2017. Consequently to the enhanced auxiliary heating power, the active divertor heat flux control is urgently needed in EAST. In 2018, the active divertor detachment feedback control was implemented successfully in EAST plasma control system (PCS) with divertor Langmuir probe measurements for evaluating the divertor particle flux. The control algorithm controlled the degree of detachment effectively during the 2018 EAST experiments through either D-2 fueling in the low field side using SMBI or impurity seeding from the divertor volume in H-mode plasmas, without significant degradation of the core-plasma performance, i.e., exhibiting good core-edge-divertor integration. The algorithm implementation in PCS and experimental results will be reported in this paper. Further efforts will be made to extend active feedback control towards long-pulse H-mode detachment maintenance in the near future, which will benefit the high power, H-mode operation for ITER.
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