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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