Divertor detachment with multi-species impurity seeding in LHD

被引：0
|
作者：
Mukai K. [1 ,2 ]
Masuzaki S. [1 ]
Hayashi Y. [1 ]
Oishi T. [1 ,2 ]
Suzuki C. [1 ]
Kobayashi M. [1 ,2 ]
Tanaka H. [3 ]
Peterson B.J. [1 ,2 ]
机构：
[1] National Institute for Fusion Science, National Institutes of Natural Sciences, Toki
[2] Graduate University for Advanced Studies, SOKENDAI, Toki
[3] Graduate School of Engineering, Nagoya University, Nagoya
来源：
Plasma and Fusion Research | 2020年 / 15卷
基金：
日本学术振兴会;
关键词：
Divertor detachment; Impurity seeding; Radiation profile; Stable; Superimposed seeding; Ustainment;
D O I：
10.1585/PFR.15.1402051
中图分类号：
学科分类号：
摘要：
Divertor detachment using higher-Z (Kr) and/or lower-Z (Ne) is investigated. Using Kr+Ne superimposed seeding, plasma radiation could be enhanced at the upstream region in the edge plasma with suppression of impurity accumulation toward the core plasma. Here, the pre-seeded Kr emission was drastically enhanced after the subsequent Ne seeding. Moreover, the detachment using Kr+Ne seeding could be stably sustained while the detachment using single species seeding is short-lived. Reduction of edge electron temperature due to Ne seeding can promote the Kr emission at the upstream region. It indicates the availability of multi-species impurity seeding with different cooling rate. © 2020 The Japan Society of Plasma Science and Nuclear Fusion Research.
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