Development of plasma control schemes and plan of plasma physics studies in JT-60SA
Development of plasma control schemes and plan of plasma physics studies in JT-60SA
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JT-60SA等离子体控制方案的开发和等离子体物理研究计划
DOI：
10.1007/s41614-022-00089-x
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
浦野創
中科院分区：
文献类型：
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作者：
浦野創
JT-60 SA项目的主要使命是通过对ITER向DEMO堆的支持和补充工作，为早日实现聚变能做出贡献。本文综述了JT-60 SA的主要前期研究成果，为ITER等离子体物理的发展做出了贡献。在集成调试之前，基于先进的ISO-FLUX平衡控制方案的等离子体形状控制方法已经开发并在JT-60 SA平衡控制器中实现。自适应电压分配（AVA）方案自动优化等离子体位置和形状的控制增益。在JT-60 SA等离子体击穿的情况下进行了研究，通过一种新的方法的基础上优化的逆重建的磁通量，ECH援助，和估计的启动区域，而不产生逃逸电子。在第一阶段的初步研究中，大型超导电机在大电流下的稳定运行和ITER非激活阶段的风险缓解将是重点。一个强大的VDE预测器已开发与机器学习和自适应电压分配方案。研究了偏滤器注入杂质后热负荷的控制方案。JT-60 SA能够在高三角度和高延伸率下运行，接近ITER等离子体。用EPED 1模型验证了JT-60 SA的高度成形等离子体操作使边缘压力梯度相对于剥离-气球模式更高，并带来了有利的基座压力。JT-60 SA实验小组将解决ITER和DEMO相关制度中等离子体物理和控制研究的主要问题。
The main mission of JT-60SA project is to contribute to early realization of fusion energy by conducting supportive and complementary works for ITER towards DEMO reactor. This paper summarized the main results of preparatory studies on JT-60SA for the contributions to ITER on plasma physics including the first ITER campaigns. In advance to the integrated commissioning, the plasma shape control method based on an advanced scheme of ISO-FLUX equilibrium control has been developed and implemented in the JT-60SA equilibrium controller. The Adaptive Voltage Allocation (AVA) scheme automatically optimizes the control gains for the plasma position and shape. Plasma breakdown scenarios in JT-60SA have been investigated by a new method based on the optimization of inversely reconstructed magnetic fluxes, ECH assistance, and estimation of the start-up region without generating runaway electrons. During the initial research phase I, the stable operation at high current in large superconducting machine and the ITER risk mitigation for non-activated phase will be highlighted. A robust VDE predictor has been developed with machine learning and the adaptive voltage allocation scheme. The control schemes of divertor heat load with impurity seeding has been investigated. The JT-60SA is capable of operating at high triangularity and high elongation, close to ITER plasma. It has been examined by EPED1 model that highly shaped plasma operation of JT-60SA enables the edge pressure gradient to be high against the peeling–ballooning mode and bring a favorable pedestal pressure. The JT-60SA Experiment Team will address the major issues of the plasma physics and control studies in ITER and DEMO-relevant regimes.