Upgraded flowing liquid lithium limiter for improving Li coverage uniformity and erosion resistance in EAST device

Zuo, G. Z.; Hu, J. S.; Maingi, R.; Yang, Q. X.; Sun, Z.; Huang, M.; Chen, Y.; Yuan, X. L.; Meng, X. C.; Xu, W.; Gentile, C.; Carpe, A.; Diallo, A.; Lunsford, R.; Mansfield, D.; Osborne, T.; Tritz, K.; Li, J. G.

doi:10.1063/1.4997806

Title: Upgraded flowing liquid lithium limiter for improving Li coverage uniformity and erosion resistance in EAST device

Journal Article · Thu Dec 14 00:00:00 EST 2017 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4997806· OSTI ID:1437606

Zuo, G. Z. ^[1]; Hu, J. S. ^[1]; Maingi, R. ^[2]; Yang, Q. X. ^[1]; Sun, Z. ^[1]; Huang, M. ^[1]; Chen, Y. ^[1];

^[1]; Meng, X. C. ^[3]; Xu, W. ^[1]; Gentile, C. ^[2]; Carpe, A. ^[2]; Diallo, A. ^[2]; Lunsford, R. ^[2]; Mansfield, D. ^[2]; Osborne, T. ^[4]; Tritz, K. ^[5]; Li, J. G. ^[1]

Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Hunan Univ., Changsha (China). Dept. of Applied Physics
General Atomics, San Diego, CA (United States)
Johns Hopkins Univ., Baltimore, MD (United States)

In this paper, we report on design and technology improvements for a flowing liquid lithium (FLiLi) limiter inserted into auxiliary heated discharges in the experimental advanced superconducting tokamak device. In order to enhance Li coverage uniformity and erosion resistance, a new liquid Li distributor with homogenous channels was implemented. In addition, two independent electromagnetic pumps and a new horizontal capillary structure contributed to an improvement in the observed Li flow uniformity (from 30% in the previous FLiLi design to >80% in this FLiLi design). To improve limiter surface erosion resistance, hot isostatic press technology was applied, which improved the thermal contact between thin stainless steel protective layers covering the Cu heat sink. The thickness of the stainless steel layer was increased from 0.1 mm to 0.5 mm, which also helped macroscopic erosion resilience. Finally, despite the high auxiliary heating power up to 4.5 MW, no Li bursts were recorded from FLiLi, underscoring the improved performance of this new design.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Chinese Academy of Sciences (CAS), Hefei (China)

Sponsoring Organization:: USDOE; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Magnetic Confinement Fusion Science Program of China

Grant/Contract Number:: AC02-09CH11466; 2017YFA0402500; 11775261; 11625524; 11605246; 11075185; 11021565; 2013GB114004

OSTI ID:: 1437606

Journal Information:: Review of Scientific Instruments, Vol. 88, Issue 12; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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