Kinetic modelling of impurity transport in detached plasma for integrated divertor simulation with SONIC (SOLDOR/NEUT2D/IMPMC/EDDY)
Kinetic modelling of impurity transport in detached plasma for integrated divertor simulation with SONIC (SOLDOR/NEUT2D/IMPMC/EDDY)
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DOI：
10.1088/0029-5515/49/6/065028
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发表时间：
2009-06
期刊：
影响因子：
3.3
通讯作者：
K. Shimizu;T. Takizuka;K. Ohya;K. Inai;T. Nakano;A. Takayama;H. Kawashima;K. Hoshino
中科院分区：
文献类型：
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作者：
K. Shimizu;T. Takizuka;K. Ohya;K. Inai;T. Nakano;A. Takayama;H. Kawashima;K. Hoshino
通过克服蒙特卡罗（MC）杂质输运模拟的固有问题，将IMPMC与偏滤器程序SOLDOR/NEUT 2D自洽地耦合起来。为了考虑动力学效应和碳氢化合物的复杂解离过程，需要对杂质输运进行MC建模。集成偏滤器代码SONIC使我们能够通过进一步耦合三维等离子体-表面相互作用MC代码EDDY来研究偏滤器板上的杂质输运包括侵蚀/再沉积过程的细节。本文研究了JT-60 U上X点MARFE的动力学演化。模拟结果表明，从圆顶溅射的碳氢化合物有助于增强X点附近的辐射。本文研究了热作用力对JT-60 SA分离等离子体中He输运的动力学效应。与常规（流体）评估相比，在没有再循环的情况下，动力学效应改善了氦压缩。然而，这种效应被偏滤器靶处的再循环所掩盖。
A Monte Carlo (MC) impurity code IMPMC has been coupled self-consistently with a divertor code SOLDOR/NEUT2D by overcoming the intrinsic problems of MC modelling for impurity transport. MC modelling is required for impurity transport in order to take into account the kinetic effect and the complex dissociation processes of hydrocarbons. The integrated divertor code SONIC enables us to investigate the details of impurity transport including erosion/redeposition processes on the divertor plates by further coupling of an 3D plasma–surface interaction MC code EDDY. The dynamic evolution of X-point MARFE observed in JT-60U is investigated. The simulation results indicate that the hydrocarbons sputtered from the dome contribute to the enhanced radiation near the X-point. The kinetic effect of thermal force on the He transport is investigated for JT-60SA detached plasmas. Without the recycling, the kinetic effect improves the helium compression, compared with the conventional (fluid) evaluation. This effect is, however, masked by the recycling at the divertor targets.