Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST
Abstract
Significant engineering and physic progress was made by the upgrade of a flowing liquid lithium limiter (FLiLi) inserted into EAST H-mode discharges in 2016. The progress includes an improvement of liquid Li coverage uniformity, no macroscopic surface erosion by plasma materials interaction, effective removal of 55% of the discharge heat flux using high pressure He cooling during ohmic discharges, and the demonstrated ability to restart Li flow for a second experiment performed a week after the first. With increasing Li flow rate, fuel particle recycling and Fe impurity radiation gradually decreased, and plasma performance slightly improved, but there was no impact on the edge tungsten influx. No obvious Li bursts appeared during operation with up to about 4.5 MW auxiliary heating power with peak heat flux reaching ~4 MW m–2 on FLiLi. In addition, a gradual mitigation of edge localized mode (ELM) activity was observed with FLiLi operation. Lastly, short-lived ELM-free phases were observed for the first time in EAST during FLiLi insertion, with increasing τ E and transient H98(y, 2) < 2.
- Authors:
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[4];
[1];
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- Chinese Academy of Sciences, Anhui (China)
- Chinese Academy of Sciences, Anhui (China); CAS key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei (China)
- Princeton Univ., Princeton, NJ (United States)
- Chinese Academy of Sciences, Anhui (China); Princeton Univ., Princeton, NJ (United States)
- Chinese Academy of Sciences, Anhui (China); Shenzhen Univ., Shenzhen (China)
- Hefei Univ. of Technology, Hefei (China)
- Johns Hopkins Univ., Baltimore, MD (United States)
- Univ. of Chinese Academy of Sciences, Beijing (China)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- Contributing Org.:
- EAST team
- OSTI Identifier:
- 1512785
- Grant/Contract Number:
- 2017YFA0402500; 2017YFE0301100; 2017YFE0301300; AC02-09CH11466; 11775261; 11625524; 11605246; 11075185; 1102156
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 59; Journal Issue: 1; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; liquid Li; Li uniformity; heat flux; high power plasma; edge localized mode
Citation Formats
Zuo, G. Z., Hu, J. S., Maingi, R., Sun, Z., Yang, Q. X., Huang, M., Meng, X. C., Xu, W., Qian, Y. Z., Li, C. L., Bi, H. L., Chen, Y., Yuan, X. L., Han, X. F., Zhu, X., Wang, Y. F., Zhang, L., Liu, H. Q., Wang, L., Gong, X. Z., Tritz, K., Diallo, A., Lunsford, R., Ni, M. J., and Li, J. G. Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST. United States: N. p., 2018.
Web. doi:10.1088/1741-4326/aaedcb.
Zuo, G. Z., Hu, J. S., Maingi, R., Sun, Z., Yang, Q. X., Huang, M., Meng, X. C., Xu, W., Qian, Y. Z., Li, C. L., Bi, H. L., Chen, Y., Yuan, X. L., Han, X. F., Zhu, X., Wang, Y. F., Zhang, L., Liu, H. Q., Wang, L., Gong, X. Z., Tritz, K., Diallo, A., Lunsford, R., Ni, M. J., & Li, J. G. Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST. United States. https://doi.org/10.1088/1741-4326/aaedcb
Zuo, G. Z., Hu, J. S., Maingi, R., Sun, Z., Yang, Q. X., Huang, M., Meng, X. C., Xu, W., Qian, Y. Z., Li, C. L., Bi, H. L., Chen, Y., Yuan, X. L., Han, X. F., Zhu, X., Wang, Y. F., Zhang, L., Liu, H. Q., Wang, L., Gong, X. Z., Tritz, K., Diallo, A., Lunsford, R., Ni, M. J., and Li, J. G. Tue .
"Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST". United States. https://doi.org/10.1088/1741-4326/aaedcb. https://www.osti.gov/servlets/purl/1512785.
@article{osti_1512785,
title = {Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST},
author = {Zuo, G. Z. and Hu, J. S. and Maingi, R. and Sun, Z. and Yang, Q. X. and Huang, M. and Meng, X. C. and Xu, W. and Qian, Y. Z. and Li, C. L. and Bi, H. L. and Chen, Y. and Yuan, X. L. and Han, X. F. and Zhu, X. and Wang, Y. F. and Zhang, L. and Liu, H. Q. and Wang, L. and Gong, X. Z. and Tritz, K. and Diallo, A. and Lunsford, R. and Ni, M. J. and Li, J. G.},
abstractNote = {Significant engineering and physic progress was made by the upgrade of a flowing liquid lithium limiter (FLiLi) inserted into EAST H-mode discharges in 2016. The progress includes an improvement of liquid Li coverage uniformity, no macroscopic surface erosion by plasma materials interaction, effective removal of 55% of the discharge heat flux using high pressure He cooling during ohmic discharges, and the demonstrated ability to restart Li flow for a second experiment performed a week after the first. With increasing Li flow rate, fuel particle recycling and Fe impurity radiation gradually decreased, and plasma performance slightly improved, but there was no impact on the edge tungsten influx. No obvious Li bursts appeared during operation with up to about 4.5 MW auxiliary heating power with peak heat flux reaching ~4 MW m–2 on FLiLi. In addition, a gradual mitigation of edge localized mode (ELM) activity was observed with FLiLi operation. Lastly, short-lived ELM-free phases were observed for the first time in EAST during FLiLi insertion, with increasing τ E and transient H98(y, 2) < 2.},
doi = {10.1088/1741-4326/aaedcb},
journal = {Nuclear Fusion},
number = 1,
volume = 59,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}
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