Experimental research on the deeply detached X-point radiator regime on EAST
Abstract Radiative divertor detachment with impurity seeding is considered one of the most promising means for mitigating particle and heat fluxes on the divertor target. To measure the impurity radiation distribution, a tangentially viewing camera system for lower divertor plasma observation has been developed and installed on EAST. A reconstructed 2D distribution of N II line radiation is obtained based on Phillips–Tikhonov regularization, revealing the electron temperature region in the range of 6–10 eV during a nitrogen (N 2 ) seeding experiment. With N 2 seeding, the deep detachment with the stable X-point radiator (XPR) has been achieved on EAST with a tungsten divertor and metal first wall components. The profiles of T et and q t with a distance to the strike point larger than 6 cm ( ρ ∼ 1.06) are radially flat on the outer divertor target in the deeply detached state. The XPR contributes to the effective divertor protection with mitigation of heat/particle fluxes and suppression of divertor target sputtering.
Authors
- B.-L. Zhang
- Lin Yu (ORCID: https://orcid.org/0000-0002-0185-7407)
- Qiuyang Zhang (ORCID: https://orcid.org/0009-0003-6636-8094)
- Pengfei Zhou (ORCID: https://orcid.org/0000-0001-6335-7769)
- Kedong Li (ORCID: https://orcid.org/0000-0003-0486-7368)
- Xin Lin (ORCID: https://orcid.org/0000-0003-4540-3017)
- L.Y. Meng (ORCID: https://orcid.org/0000-0002-8633-5383)
- Kangning Geng (ORCID: https://orcid.org/0000-0001-7808-0192)
- Yanmin Duan (ORCID: https://orcid.org/0000-0001-8606-3560)
- Yifei Jin (ORCID: https://orcid.org/0000-0002-3061-6709)
- Rong Yan (ORCID: https://orcid.org/0000-0002-8648-0636)
- Tao Zhang (ORCID: https://orcid.org/0000-0002-1555-6226)
- Bin Zhang (ORCID: https://orcid.org/0000-0003-0304-2372)
- Chunyu He (ORCID: https://orcid.org/0000-0002-6211-6506)
- Fudi Wang (ORCID: https://orcid.org/0000-0002-2462-7145)
- W. Kai (ORCID: https://orcid.org/0000-0001-8791-7775)
- Yang Wang (ORCID: https://orcid.org/0000-0002-5442-6723)
- Rui Ding (ORCID: https://orcid.org/0000-0003-2880-9736)
- Jianhua Yang
- Baoguo Wang (ORCID: https://orcid.org/0000-0001-8299-283X)
- Junling Chen
- Hailin Zhao (ORCID: https://orcid.org/0000-0002-4736-5897)
- Dahuan Zhu (ORCID: https://orcid.org/0000-0001-6655-1372)
- Binfu Gao (ORCID: https://orcid.org/0000-0003-3477-5229)
- Liang Wang (ORCID: https://orcid.org/0000-0002-8373-117X)
- Jinju Yang
Institutions
- University of Science and Technology of China (CN)
- Donghua University (CN)
- Chinese Academy of Sciences (CN)
- Institute of Plasma Physics (CN)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2025-06-16
- DOI
- https://doi.org/10.1088/1741-4326/ade4da
- Citations
- 3
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 5.61
Funders
- National Natural Science Foundation of China
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Natural Science Foundation of Anhui Province
- National Key Research and Development Program of China