Evidence of vapor shielding effect on heat flux loaded on flowing liquid lithium limiter in EAST

Chenglong Li, Guizhong Zuo, R. Manigi, K. Tritz, D. Andruczyk, Bin Zhang, Ruirong Liang, D. Oliver, Zhen Sun, Wei Xu, Xiancai Meng, Ming Huang, Zhongliang Tang, Binfu Gao, Ning Yan, Jiansheng Hu

Research output: Contribution to journalArticlepeer-review


A lithium (Li) vapour layer was formed around a flowing liquid Li limiter to shield against the plasma incident power and reduce limiter heat flux in the EAST tokamak. The results revealed that after a plasma operation of a few seconds, the layer became clear, which indicated a strong Li emission with a decrease in the limiter surface temperature. This emission resulted in a dense vapour around the limiter, and Li ions moved along the magnetic field to form a green shielding layer on the limiter. The plasma heat flux loaded on the limiter, measured by the probe installed on the limiter, was approximately 52% lower than that detected by a fast-reciprocating probe at the same radial position without the limiter in EAST. Additionally, approximately 42% of the parallel heat flux was dissipated directly with the enhanced Li radiation in the discharge with the liquid metal infused trenches (LIMIT) limiter. This observation revealed that the Li vapour layer exhibited an excellent shielding effect to liquid Li on plasma heat flux, which is a possible benefit of liquid-plasma-facing components in future fusion devices.

Original languageEnglish (US)
Article number095104
JournalPlasma Science and Technology
Issue number9
StatePublished - Sep 1 2022
Externally publishedYes


  • EAST
  • Li vapor shielding
  • heat flux
  • liquid Li limiter

ASJC Scopus subject areas

  • Condensed Matter Physics


Dive into the research topics of 'Evidence of vapor shielding effect on heat flux loaded on flowing liquid lithium limiter in EAST'. Together they form a unique fingerprint.

Cite this