| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
Prev
Next
|
|
|
Study on divertor plasma behavior through sweeping strike point in new lower divertor on EAST |
| Yu-Qiang Tao(陶余强)1,2, Guo-Sheng Xu(徐国盛)1,†, Ling-Yi Meng(孟令义)1,2, Rui-Rong Liang(梁瑞荣)1,2, Lin Yu(余林)1,2, Xiang Liu(刘祥)1, Ning Yan(颜宁)1, Qing-Quan Yang(杨清泉)1, Xin Lin(林新)1, and Liang Wang(王亮)1,3,‡ |
1 Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
2 University of Science and Technology of China, Hefei 230026, China;
3 Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China |
|
|
|
|
Abstract A series of L-mode discharges have been conducted in the new ‘corner slot’ divertor on the Experimental Advanced Superconducting Tokamak (EAST) to study the divertor plasma behavior through sweeping strike point. The plasma control system controls the strike point sweeping from the horizontal target to the vertical target through poloidal field coils, with keeping the main plasma stability. The surface temperature of the divertor target cools down as the strike point moves away, indicating that sweeping strike point mitigates the heat load. To avoid the negative effect of probe tip damage, a method based on sweeping strike point is used to get the normalized profile and study the decay length of particle and heat flux on the divertor target λjs, λq. In the discharges with high radio-frequency (RF) heating power, electron temperature Te is lower and λjs is larger when the strike point locates on the horizontal target compared to the vertical target, probably due to the corner effect. In the Ohmic discharges, λjs, λq are much larger compared to the discharges with high RF heating power, which may be attributed to lower edge Te.
|
Received: 28 October 2021
Revised: 07 January 2022
Accepted manuscript online: 12 January 2022
|
|
PACS:
|
52.55.Ez
|
(Theta pinch)
|
| |
52.55.Rk
|
(Power exhaust; divertors)
|
| |
52.40.-w
|
(Plasma interactions (nonlaser))
|
|
| Fund: The authors would like to acknowledge collaboration of the EAST team. Project supported by the National Key Research and Development Program of China (Grant No. 2017YFE0301300), the National Natural Science Foundation of China (Grant Nos. 12005257, 12005004, 11905143, and 11922513), the Fund from the Institute of Energy, Hefei Comprehensive National Science Center (Grant No. GXXT-2020-004), the CASHIPS Director's Fund (Grant Nos. BJPY2019A01 and YZJJ2020QN13), the Special Research Assistant Funding of CAS and China Postdoctoral Science Foundation (Grant No. 2020M671913), and Anhui Provincial Natural Science Foundation (Grant No. 2008085QA38). |
Corresponding Authors:
Guo-Sheng Xu, Liang Wang
E-mail: gsxu@ipp.ac.cn;lwang@ipp.ac.cn
|
Cite this article:
Yu-Qiang Tao(陶余强), Guo-Sheng Xu(徐国盛), Ling-Yi Meng(孟令义), Rui-Rong Liang(梁瑞荣), Lin Yu(余林), Xiang Liu(刘祥), Ning Yan(颜宁), Qing-Quan Yang(杨清泉), Xin Lin(林新), and Liang Wang(王亮) Study on divertor plasma behavior through sweeping strike point in new lower divertor on EAST 2022 Chin. Phys. B 31 065204
|
[1] Xu G S, Wang L, Yao D M, Jia G Z, Sang C F, Liu X J, Chen Y P, Si H, Yang Z S, Guo H Y, et al. 2021 Nucl. Fusion 61 126070
[2] Ryutov D D and Soukhanovskii V A 2015 Phys. Plasmas 22 110901
[3] Valanju P M, Kotschenreuther M and Mahajan S M 2009 Phys. Plasmas 16 056110
[4] Guo H Y, Wang H Q, Watkins J G, Casali L, Covele B, Moser A L, Osborne T, Samuell C M, Shafer M W and Stangeby P C 2019 Nucl. Fusion 59 086054
[5] Silburn S A, Matthews G F, Challis C D, Frigione D, Graves J P, Mantsinen M J, Belonohy E, Hobirk J, Iglesias D and Keeling D L 2017 Phys. Scr. 2017 014040
[6] Zhang X D et al. Fishtail divertor: a new divertor concept on east for active control of heat load on divertor plate, 2016 26th IAEA Fusion Energy Conference, 17-22 Kyoto, Japan
[7] Zhang Y et al. Development of Fishtail Divertor for active control of heat load on EAST tokamak, 2021 24th International Conference on Plasma-Surface Interaction in Controlled Fusion Devices, 24-29, Jeju, Korea
[8] Maviglia F, Federici G, Strohmayer G, Wenninger R, Bachmann C, Albanese R, Ambrosino R, Li M, Loschiavo V P, You J H and Zani L 2016 Fusion Eng. Des. 109 1067
[9] Jaervinen A E, Allen S L, Eldon D, Fenstermacher M E, Groth M, Hill D N, Leonard A W, Mclean A G, Porter G D, Rognlien T D, Samuell C M and Wang H Q 2018 Phys. Rev. Lett. 121 075001
[10] Liu J B, Guo H Y, Wang L, Xu G S, Wang H Q, Liu S C, Feng W, Xu J C, Deng G Z, Yang Q Q and Ling B L 2015 Fusion Eng. Des. 100 301
[11] Wang L, Guo H Y, Xu G S, Liu S C, Gan K F, Wang H Q, Gong X Z, Liang Y, Zou X L, Hu J S, et al. 2014 Nucl. Fusion 54 114002
[12] Liu X, Nielsen A H, Rasmussen J J, Naulin V, Olsen J, Xia T Y, Wang L, Deng G Z, Wu X Q, Liu Y, Wang Y M, Li Y Y, Zang Q, Xu G S and Li J 2019 Phys. Plasmas 26 042509
[13] Chen M W, Yang X F, Gong X Z, Gan K F, Zhang B and Yang Z D 2020 Fusion Eng. Des. 150 111415
[14] Meng L Y, Xu J C, Liu J B, Wang L, Qian X Y, Chen L, Liu X, Xu G S, Liang R R, Huang J, el al. 2021 Nucl. Mater. Energy 27 100996
[15] Xu J C, Wang L, Xu G S, Luo G N, Yao D M, Li Q, Cao L, Chen L, Zhang W, Liu S C, et al. 2016 Rev. Sci. Instrum. 87 083504
[16] Eich T, Leonard A W, Pitts R A, Fundamenski W, Goldston R J, Gray T K, Herrmann A, KirK A, Kallenbach A, Kardaun O, et al. 2013 Nucl Fusion 53 093031
[17] Liu X, Naulin V, Xu J C, Deng G Z, Rasmussen J J, Liu J B, Nielsen A H, Goldston R J, Maingi R and Liu Y 2019 Plasma Phys. Control. Fusion 61 045001
[18] Sieglin B, Eich T, Faitsch M, Herrmann A, Scarabosio A and the ASDEX Upgrade Team 2016 Plasma Phys. Control. Fusion 58 055015 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
