Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST

G. Z. Zuo; J. S. Hu; R. Maingi; Z. Sun; Q. X. Yang; M. Huang; X. C. Meng; W. Xu; Y. Z. Qian; C. L. Li; H. L. Bi; Y. Chen; X. L. Yuan; X. F. Han; X. Zhu; Y. F. Wang; L. Zhang; H. Q. Liu; L. Wang; X. Z. Gong; K. Tritz; A. Diallo; R. Lunsford; M. J. Ni; J. G. Li

doi:10.1088/1741-4326/aaedcb

Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST

G. Z. Zuo
, J. S. Hu
, R. Maingi
, Z. Sun
, Q. X. Yang
, M. Huang
, X. C. Meng
, W. Xu
, Y. Z. Qian
, C. L. Li
, H. L. Bi
, Y. Chen
, X. L. Yuan
, X. F. Han
, X. Zhu
, Y. F. Wang
, L. Zhang
, H. Q. Liu
, L. Wang
, X. Z. Gong

K. Tritz, A. Diallo, R. Lunsford, M. J. Ni, J. G. Li

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

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. Finally, short-lived ELM-free phases were observed for the first time in EAST during FLiLi insertion, with increasing τ _E and transient H_{98(y, 2)} < 2.

Original language	English (US)
Article number	016009
Journal	Nuclear Fusion
Volume	59
Issue number	1
DOIs	https://doi.org/10.1088/1741-4326/aaedcb
State	Published - 2019

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Keywords

edge localized mode
heat flux
high power plasma
Li uniformity
liquid Li

Access to Document

10.1088/1741-4326/aaedcb

Cite this

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., ... Li, J. G. (2019). Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST. Nuclear Fusion, 59(1), Article 016009. https://doi.org/10.1088/1741-4326/aaedcb

@article{4bfb153ba1b548e39fa192c347a3815c,

title = "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. Finally, 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.",

keywords = "edge localized mode, heat flux, high power plasma, Li uniformity, liquid Li",

author = "Zuo, \{G. Z.\} and Hu, \{J. S.\} and R. Maingi and Z. Sun and Yang, \{Q. X.\} and M. Huang and Meng, \{X. C.\} and W. Xu and Qian, \{Y. Z.\} and Li, \{C. L.\} and Bi, \{H. L.\} and Y. Chen and Yuan, \{X. L.\} and Han, \{X. F.\} and X. Zhu and Wang, \{Y. F.\} and L. Zhang and Liu, \{H. Q.\} and L. Wang and Gong, \{X. Z.\} and K. Tritz and A. Diallo and R. Lunsford and Ni, \{M. J.\} and Li, \{J. G.\}",

note = "Publisher Copyright: {\textcopyright} 2018 IAEA, Vienna.",

year = "2019",

doi = "10.1088/1741-4326/aaedcb",

language = "English (US)",

volume = "59",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "1",

}

Zuo, GZ, Hu, JS, Maingi, R , Sun, Z, Yang, QX, Huang, M, Meng, XC, Xu, W, Qian, YZ, Li, CL, Bi, HL, Chen, Y, Yuan, XL, Han, XF, Zhu, X, Wang, YF, Zhang, L, Liu, HQ, Wang, L, Gong, XZ, Tritz, K, Diallo, A , Lunsford, R, Ni, MJ & Li, JG 2019, 'Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST', Nuclear Fusion, vol. 59, no. 1, 016009. https://doi.org/10.1088/1741-4326/aaedcb

TY - JOUR

T1 - Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST

AU - Zuo, G. Z.

AU - Hu, J. S.

AU - Maingi, R.

AU - Sun, Z.

AU - Yang, Q. X.

AU - Huang, M.

AU - Meng, X. C.

AU - Xu, W.

AU - Qian, Y. Z.

AU - Li, C. L.

AU - Bi, H. L.

AU - Chen, Y.

AU - Yuan, X. L.

AU - Han, X. F.

AU - Zhu, X.

AU - Wang, Y. F.

AU - Zhang, L.

AU - Liu, H. Q.

AU - Wang, L.

AU - Gong, X. Z.

AU - Tritz, K.

AU - Diallo, A.

AU - Lunsford, R.

AU - Ni, M. J.

AU - Li, J. G.

PY - 2019

Y1 - 2019

N2 - 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. Finally, 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.

AB - 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. Finally, 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.

KW - edge localized mode

KW - heat flux

KW - high power plasma

KW - Li uniformity

KW - liquid Li

UR - https://www.scopus.com/pages/publications/85063460268

UR - https://www.scopus.com/pages/publications/85063460268#tab=citedBy

U2 - 10.1088/1741-4326/aaedcb

DO - 10.1088/1741-4326/aaedcb

M3 - Article

AN - SCOPUS:85063460268

SN - 0029-5515

VL - 59

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 1

M1 - 016009

ER -

Results from an improved flowing liquid lithium limiter with increased flow uniformity in high power plasmas in EAST

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this