Controllability study of EAST plasma vertical instability and improvement in future
Controllability study of EAST plasma vertical instability and improvement in future
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DOI：
10.1016/j.fusengdes.2014.02.069
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发表时间：
2014-05
影响因子：
1.7
通讯作者：
Lei Liu;B. Xiao;D. Humphreys;Zheng-ping Luo;Shiyong Chen
中科院分区：
文献类型：
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作者：
Lei Liu;B. Xiao;D. Humphreys;Zheng-ping Luo;Shiyong Chen
为了提高控制速度，EAST的每个上/下铜钝化板都被切割成8块。这些不连续的板段仍然通过钢支撑腿连接到内部真空室。建立了该板块节段支腿环模型，并通过EAST垂直位移事件(VDE)实验进行了验证。还对VDE控制的内部线圈(IC)电源要求进行了评估。特别是，我们研究了内部控制线圈位置的有效性，以最小化电源能力。讨论了优化选址和实际选址对IC电源升级的要求。在不同伸长率的情况下进行了VDE实验，以评估最大可控垂直位移(DZmax)，并总结了由此产生的EAST垂直可控性估计。这些实验结果验证了以前的仿真结果，即现有的IC电源容量不能提供稳健的垂直控制。
In order to enhance control speed, each up/down Cu passive plate in EAST is cut into 8 pieces. These discontinuous plate segments are still connected to the inner vacuum vessel by steel supporting legs. A model of this plate segments-vessel-supporting leg loop is developed and verified by EAST vertical displacement event (VDE) experiments. The internal coil (IC) power supply requirements for VDE control are also evaluated. In particularly, we investigate the efficacy of internal control coil location to minimize the power supply capability. The IC power supply upgrade requirements for the optimized location and actual location are discussed. VDE experiments to evaluate maximum controllable vertical displacement (dZmax) were done with varying elongation and resulting EAST vertical controllability estimates are summarized here. These experimental results verified previous simulation results that present IC power supply capacity cannot provide robust vertical control.