Heat flux mitigation characteristics in the radiative divertors with multi-peaks of heat flux in the large helical device

被引：0
作者：
Hayashi, Yuki [1 ]
Masuzaki, Suguru [2 ,3 ]
Kobayashi, Masahiro [2 ,3 ]
Kawamura, Gakushi [2 ,4 ]
Mukai, Kiyofumi [2 ,3 ]
Tanaka, Hirohiko [5 ]
Murase, Takanori [2 ]
机构：
[1] Univ Tokyo, Grad Sch Frontier Sci, Kashiwa 2778561, Japan
[2] Natl Inst Fus Sci, Natl Inst Nat Sci, Toki 5095292, Japan
[3] Grad Univ Adv Studies, SOKENDAI, Toki 5095292, Japan
[4] Natl Inst Quantum Sci & Technol, Rokkasho 0393212, Japan
[5] Nagoya Univ, Grad Sch Engn, Nagoya 4648603, Japan
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2025年 / 67卷 / 02期
关键词：
radiative divertor; impurity seeding; divertor thermography; EMC3-EIRENE; LHD; TRANSPORT; LHD;
D O I：
10.1088/1361-6587/ada1fc
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：
In this study, the effects of impurity seeding on the one- and two-dimensional heat flux profiles of the large helical device divertor with a multi-peaks of heat flux were investigated, focusing on the heat-flux-reduction characteristics at the two peaks. The divertor heat flux profile was reconstructed using finite element analysis based on the temperature distribution measured via infrared thermography. The divertor heat flux profiles were calculated using the EMC3-EIRENE code considering the impurity seeding. In general, the calculated results were consistent with the experimental observations, including the heat flux value and reduction via impurity seeding. The reduction in the divertor heat flux due to impurity seeding was almost similar at different heat flux peaks and exhibited little dependence on the heating power variance. The difference between the low- and high-heating-power cases is discussed by tracing the magnetic field lines from the divertor plate and considering the penetration depth of the impurity particles into the scrape-off layer plasma.
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页数：11
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