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

G. Z. Zuo, J. S. Hu, R. Maingi, C. L. Li, X. C. Meng, Z. Sun, M. Huang, W. Xu, Y. Z. Qian, D. Andruczyk, K. Tritz, X. Z. Gong, J. G. Li

Research output: Contribution to journalConference article

Abstract

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.

Original languageEnglish (US)
Article number014008
JournalPhysica Scripta
Volume2020
Issue numberT171
DOIs
StatePublished - Jan 1 2020
Event17th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2019 - Eindhoven, Netherlands
Duration: May 20 2019May 24 2019

Keywords

  • East
  • Flowing liquid li
  • Li surface coverage
  • Plasma performance
  • Surface erosion

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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    Zuo, G. Z., Hu, J. S., Maingi, R., Li, C. L., Meng, X. C., Sun, Z., Huang, M., Xu, W., Qian, Y. Z., Andruczyk, D., Tritz, K., Gong, X. Z., & Li, J. G. (2020). Improvement on the plasma performances via application of flowing lithium limiters in EAST tokamak. Physica Scripta, 2020(T171), [014008]. https://doi.org/10.1088/1402-4896/ab3bed