Divertor Detachment with Multi-Species Impurity Seeding in LHD

被引：8
|
作者：
Mukai, Kiyofumi [1 ,2 ]
Masuzaki, Suguru [1 ]
Hayashi, Yuki [1 ]
Oishi, Tetsutaro [1 ,2 ]
Suzuki, Chihiro [1 ]
Kobayashi, Masahiro [1 ,2 ]
Tanaka, Hirohiko [3 ]
Peterson, Byron J. [1 ,2 ]
机构：
[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan
[2] Grad Univ Adv Studies, SOKENDAI, Toki, Gifu 5095292, Japan
[3] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan
来源：
PLASMA AND FUSION RESEARCH | 2020年 / 15卷
关键词：
divertor detachment; impurity seeding; stable sustainment; superimposed seeding; radiation profile; HEAT;
D O I：
10.1585/pfr.15.1402051
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
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.
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收藏
页数：5
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