Fuel recycling control in long pulse operation with full tungsten divertors in EAST tokamak

Yu, Yaowei; Zhou, Deze; Sakamoto, Mizuki; Cao, Bin; Zuo, Guizhong; Hu, Jiansheng

doi:10.1016/j.nme.2022.101333

Fuel recycling control in long pulse operation with full tungsten divertors in EAST tokamak

Journal Article · Fri Dec 02 00:00:00 EST 2022 · Nuclear Materials and Energy

DOI:https://doi.org/10.1016/j.nme.2022.101333· OSTI ID:2420547

Yu, Yaowei ^[1]; Zhou, Deze ^[2]; Sakamoto, Mizuki ^[3]; Cao, Bin ^[2]; Zuo, Guizhong ^[2]; Hu, Jiansheng ^[2]

Chinese Academy of Sciences (CAS), Hefei (China). Institute of Plasma Physics, Hefei Institute of Physical Science; Chinese Academy of Sciences (China)
Chinese Academy of Sciences (CAS), Hefei (China). Institute of Plasma Physics, Hefei Institute of Physical Science
Univ. of Tsukuba (Japan)

Fuel recycling control in long pulse discharges is studied in EAST tokamak with tungsten divertors by particle balance. Double null configuration, proper Resonant Magnetic Perturbation (RMP), divertor cryopumps and realtime lithium injection, are all very effective for recycling control. High heating power discharge leads to low recycling due to the enhancement of particle exhausting. High external gas injection is required in a low fuel recycling discharge to keep a constant density, and Dα emission is increased by external injection, therefore a higher Dα emission may indicate low fuel recycling for the same plasma density. Reproducible long pulse discharges of over 100 s with core electron temperature >10 keV, and 1056 s discharge with ~1.5 MW heating power were obtained in the EAST 2021 campaign, fuel recycling was well controlled by divertor cryopumps and realtime lithium injection. The results provide a valuable reference for the high power and long pulse operation in future fusion reactors, such as ITER and CFETR.

View Accepted Manuscript (DOE)

Research Organization:: Johns Hopkins Univ., Baltimore, MD (United States); Princeton Univ., NJ (United States)

Sponsoring Organization:: Chinese Postdoctoral Science Foundation; National Nature Science Foundation of China (NSFC); Nature Science Foundation of Anhui Province; Presidential Foundation of Hefei Institutes of Physical Science; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-09CH11466; SC0016553

OSTI ID:: 2420547

Journal Information:: Nuclear Materials and Energy, Journal Name: Nuclear Materials and Energy Journal Issue: C Vol. 34; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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Nuclear Science & Technology
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Fuel recycling control in long pulse operation with full tungsten divertors in EAST tokamak

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