The influence of an ITER-like wall on disruptions at JET
The influence of an ITER-like wall on disruptions at JET
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DOI：
10.1063/1.4872017
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发表时间：
2014-05-01
影响因子：
2.2
通讯作者：
Vega, J.
中科院分区：
文献类型：
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作者：
de Vries, P. C.;Baruzzo, M.;Vega, J.
为了保持像ITER这样的大型托卡马克的完整性，必须限制干扰的数量。JET之前的运行中断频率（即中断率）较低，为3.4% [P。C. de Vries等人，核。核聚变学报，51 (5):2011 [j]。JET的新型全金属iter式管壁开始运营后，中断率显著上升至10%。我们进行了一项全面的调查，以确定根本原因、事件链并对每次中断进行分类，类似于之前对碳壁作业的分析。它显示了为避免各种中断类别所做的改进，但也指出了那些导致中断率提高的中断类型。后者主要归因于过高的堆芯辐射造成的干扰，但也归因于密度控制问题和错误的场锁定模式。对中断原因的详细技术和物理理解对于设计优化策略以避免或减轻这些事件至关重要。
In order to preserve the integrity of large tokamaks such as ITER, the number of disruptions has to be limited. JET has operated previously with a low frequency of disruptions (i.e., disruption rate) of 3.4% [P. C. de Vries et al., Nucl. Fusion 51, 053018 (2011)]. The start of operations with the new full-metal ITER-like wall at JET showed a marked rise in the disruption rate to 10%. A full survey was carried out to identify the root causes, the chain-of-events and classifying each disruption, similar to a previous analysis for carbon-wall operations. It showed the improvements made to avoid various disruption classes, but also indicated those disruption types responsible for the enhanced disruption rate. The latter can be mainly attributed to disruptions due to too high core radiation but also due to density control issues and error field locked modes. Detailed technical and physics understanding of disruption causes is essential for devising optimized strategies to avoid or mitigate these events.