Numerical Simulation Study of Plasma Flow in the GAMMA 10/PDX End-cell Using a Fluid Code
Numerical Simulation Study of Plasma Flow in the GAMMA 10/PDX End-cell Using a Fluid Code
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使用流体代码对 GAMMA 10/PDX 终端单元中的等离子体流进行数值模拟研究
DOI：
10.1002/ctpp.201610062
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发表时间：
2016
影响因子：
1.6
通讯作者：
H.Takeda,Y.Nakashima,A.Hatayama,他８名
中科院分区：
文献类型：
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作者：
M. Shoji;G. Kawamura;H.Takeda,Y.Nakashima,A.Hatayama,他８名
为了了解杂质注入偏滤器等离子体的影响，开发了一个多流体程序，并将其应用于伽马10/PDX中从西塞/阻挡元到端元的区域。在本研究中，Ar被用作杂质中性剂。为了研究杂质注入对等离子体参数的影响，该模型考虑了Ar杂质与氢体等离子体之间的相互作用。在注入中性氢和杂质Ar的条件下，氢离子与中性离子之间的电荷交换损耗达到95%左右，电子的辐射损耗增加到45%左右。因此，氢离子和电子温度分别从约55 eV降至4 eV和15 eV至4 eV。靶板上的热负荷也较低的中性氢和杂质喷射率降低了近80%。在较高的中性密度(>；2.1×10~(18)m~(-3))下，粒子通量随中性密度的增加而增大，然后呈现饱和的趋势。(2016Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
In order to understand the effect of impurity injection into divertor plasma, a multi‐fluid code was developed and applied to the region from west plug/barrier‐cell to end cell in GAMMA 10/PDX. In this research, Ar is applied as impurity neutrals. To investigate the effect of impurity injection on plasma parameters, interactions between Ar impurity and hydrogen bulk plasma were included in this model. Under the condition of injecting neutral hydrogen and impurity Ar, the charge exchange loss between hydrogen ion and neutrals reaches to about 95% and the radiation loss for electron is enhanced to about 45%. Therefore, hydrogen ion and electron temperatures decrease from about 55 eV to 4 eV and 15 eV to 4 eV, respectively. The heat load on the target plate is also reduced by nearly 80% compared with the condition of low injection rate of neutral hydrogen and impurity. It is also observed that the particle flux increases with neutral density and then shows a tendency to saturate in the higher neutral density (> 2.1 × 1018m–3). (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)