3D effects of neon injection positions on the toroidally symmetric/asymmetric heat flux distribution on EAST
3D effects of neon injection positions on the toroidally symmetric/asymmetric heat flux distribution on EAST
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DOI：
10.1088/1361-6587/ab6072
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发表时间：
2020-01
影响因子：
2.2
通讯作者：
B. Liu;S. Dai;G. Kawamura;L. Zhang;Y. Feng;D. Wang
中科院分区：
文献类型：
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作者：
B. Liu;S. Dai;G. Kawamura;L. Zhang;Y. Feng;D. Wang
利用三维边缘输运程序EMC 3-EIRENE研究了EAST偏滤器靶上注入氖杂质后的热流沉积。研究了不同极向氖注入位置对热流沉积的影响。有人发现，氖杂质注入在板内和板外偏滤器（即罢工点），导致在板内和板外的目标上的热负荷的环形不对称分布，分别。然而，氖喷流上游显示出环形对称分布的热负荷。借助场线追踪技术研究了氖辐射对热负荷的三维影响，结果表明，与上游注入氖相比，在撞击点附近注入氖杂质可以辐射更多的功率，从而降低热负荷。为了进一步验证热负荷的不对称分布，两个杂质注入位置远离撞击点的偏滤器，这表明与上游氖注入热负荷的对称分布进行了调查。
The heat flux deposition on the divertor targets with neon impurity injection on EAST has been investigated using the three-dimensional (3D) edge transport code EMC3-EIRENE. The impact of different poloidal neon injection positions on heat flux deposition has been studied. It was found that neon impurities injected at the in- and out-board divertors (i.e. strike points) lead to toroidally asymmetric distributions of heat load on the in- and out-board targets, respectively. However, neon gas puffing upstream shows a toroidally symmetric distribution of heat load. The 3D effects of the neon radiation on the heat load have been investigated with the help of a field line tracing technique, which indicates that neon impurities injected near the strike point can radiate more power and result in a lower heat load compared with upstream neon injection. In order to further verify the asymmetric distribution of heat load, two impurity injection locations away from the strike points at the divertor are investigated, which show the symmetric distribution of heat load as with the upstream neon injection.