Three-dimensional impurity transport modeling of neon-seeded and nitrogen-seeded LHD plasmas
Three-dimensional impurity transport modeling of neon-seeded and nitrogen-seeded LHD plasmas
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DOI：
10.1088/1361-6587/aac9ea
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发表时间：
2018-06
影响因子：
2.2
通讯作者：
G. Kawamura;H. Tanaka;K. Mukai;B. Peterson;S. Dai;S. Masuzaki;M. Kobayashi;Y. Suzuki;Y. Feng-Y.
中科院分区：
文献类型：
--
作者：
G. Kawamura;H. Tanaka;K. Mukai;B. Peterson;S. Dai;S. Masuzaki;M. Kobayashi;Y. Suzuki;Y. Feng-Y.
首次采用三维输运程序EMC 3-EIRENE模拟了大螺旋装置中的杂质种子等离子体。假设杂质离子的高和低再循环系数分别包括由于氖和氮的低和高化学活性而导致的壁表面上的低和高吸收率。利用两个测辐射热计系统测量的辐射功率和安装在多个环形截面上的偏滤器探针测量的粒子通量来确定等离子体中的杂质量。环形的均匀性和非均匀性的偏滤器通量减少实验观察到的氖和氮播种，分别由该模型再现。通过测量和模型和实验之间的偏差进行了验证进行了讨论。
Modeling of impurity-seeded plasma in Large Helical Device is presented for the first time by using the three-dimensional transport code EMC3-EIRENE. High and low recycling coefficients for impurity ions are assumed to include low and high absorption rates on wall surfaces due to low and high chemical activity of neon and nitrogen, respectively. Radiation power measured by two bolometer systems and particle flux measured by divertor probes installed in multiple toroidal sections are utilized to determine impurity amount in the plasma. The toroidal uniformity and the non-uniformity of a divertor flux reduction observed experimentally for neon and nitrogen seeding, respectively, are reproduced by the model. Validations by measurements and deviations between the model and the experiment are discussed.