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Title: Improvement on the plasma performances via application of flowing lithium limiters in EAST tokamak

Journal Article · · Physica Scripta
 [1];  [1];  [2];  [3];  [4]; ORCiD logo [5];  [1];  [4];  [6];  [7];  [8];  [1];  [1]
  1. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics ; Univ. of Science and Technology of China, Hefei (China)
  4. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Shenzhen Univ. (China)
  5. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics ; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  6. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
  7. Univ. of Illinois at Urbana-Champaign, IL (United States)
  8. Johns Hopkins Univ., Baltimore, MD (United States)

Three generation of flowing liquid lithium (FLiLi) limiters have been developed and successfully tested in EAST since 2014. It was confirmed that liquid Li could be driven by an innovative in-vessel DC electromagnetic J × B pump to form a recirculating loop. The FLiLi design was continuously upgraded, resulting in improvement of the liquid Li surface coverage (>80%), elimination of surface erosion, and the increase of heat exhaust capability. Promising results are obtained during FLiLi operations, including a reduction of impurities and recycling to improve plasma confinement, and a mitigation of ELM activity in H-mode plasmas. The FLiLi limiter program has shown basic compatibility with H-mode discharges with auxiliary heating power up to 8.3 MW. These efforts will expand to flowing liquid Li PFC in high heat flux zones, e.g. near the divertor strike point in reactors.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09CH11466; 11775261; 11625524; and 11605246; 2017YFE0301100; 2017YFA0402500
OSTI ID:
1619053
Journal Information:
Physica Scripta, Vol. T171; ISSN 0031-8949
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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