B2/Eirene modeling of EAST divertor target power loading with enhanced wall carbon source and additional neon injection
B2/Eirene modeling of EAST divertor target power loading with enhanced wall carbon source and additional neon injection
复制标题
DOI：
10.1016/j.jnucmat.2007.01.012
复制
发表时间：
2007-06
影响因子：
3.1
通讯作者：
H. Guo;Sizheng Zhu;Junguo Li
中科院分区：
文献类型：
--
作者：
H. Guo;Sizheng Zhu;Junguo Li
对于EAST和未来的大功率稳态机器，如ITER，一个主要的关注是转流靶板的功率处理能力。利用B2/Eirene代码进行了详细的建模，以评估单空和双空配置下EAST导流器的目标功率负荷。一个值得注意的结果是，化学溅射增强的壁碳源可能导致等离子体边界的强辐射，显著减少靶板的热通量，在足够高的密度下，由于强大的分流器筛选，对核心等离子体的污染很小。为了进一步降低靶板的功率通量和主动控制功率负载时内外导流器的不对称，利用B2/Eirene研究了外导流器的局部氖气膨化。本文还介绍了这种高辐射杂质对目标功率负荷的影响以及对堆芯污染的后果。
A major concern for EAST and future high-powered steady-state machines such as ITER is the power handling capability of the divertor target plates. Detailed modeling using the B2/Eirene code is carried out to assess the target power loading of the EAST divertor with both single-null and double-null configurations. A remarkable output is that an enhanced wall carbon source from chemical sputtering may lead to strong radiation in the plasma boundary, significantly reducing heat fluxes to the target plates, with little contamination to the core plasma at sufficiently high densities due to strong divertor screening. As a means of further reducing the power fluxes to the target plates and actively controlling the inner/outer divertor asymmetry in power loading, localized neon gas puffing from the outer divertor is investigated using B2/Eirene. The effect of this highly radiating impurity on target power loading and the consequence for core contamination is also presented.