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Title: EAST steady-state long pulse H-mode with core-edge integration for CFETR

Abstract

Recent EAST experiment has successfully demonstrated long pulse steady-state high plasma performance scenario and core-edge integration since the last IAEA in 2018. A discharge with a duration over 60s with βP ~2.0, βN ~1.6, H98y2~1.3 and internal transport barrier on electron temperature channel is obtained with multi-RF power heating and current drive. A higher βNN~1.8, βp~2.0, H98y2~1.3, ne/nGW~0.75) with a duration of 20s is achieved by using the modulated neutral beam and multi-RF power, where several normalized parameters are close or even higher than the phase III 1GW scenario of CFETR steady-state. High-Z impurity accumulation in the plasma core is well controlled in a low level by using the on-axis ECH. Modelling shows that the strong diffusion of TEM turbulence in the central region prevents tungsten impurity to accumulate. More recently, EAST has demonstrated compatible core-edge integration discharges in the high βp scenario: high confinement H98y2>1.2 with high βP~2.5/βN~2.0 and fbs~50% is sustained with reduced divertor heat flux at high density ne/nGW~0.7 and moderate q95~6.7. By combining active impurity seeding through radiative divertor feedback control and strike point splitting induced by resonant perturbation coil, the peak heat flux is reduced by 20-30% on the ITER-like tungsten divertor, here amore » mixture of 50% neon and 50% D2 is applied.« less

Authors:
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  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. General Atomics, San Diego, CA (United States)
  3. Alternative Energies and Atomic Energy Commission (CEA), Saint Paul-lez-Durance (France)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National MCF Energy R&D Program; National Natural Science Foundation of China (NSFC); Anhui Provincial Natural Science Foundation; Chinese Academy of Sciences
OSTI Identifier:
1855250
Grant/Contract Number:  
SC0010685; 2019YFE03040000; 2019YFE03020004; 11975274; 12005262; 11975276; 2021HSC-UE018; 2020HSC-UE011; 116134KYSB20180035; 2108085J06; 2008085J04; DSJJ-2021-04
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 62; Journal Issue: 7; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Gong, Xianzu, Garofalo, Andrea M., Huang, Juan, Qian, Jinping, Ekedahl, Annika, Maingi, Rajesh, Holcomb, Chris T., Liu, Fukun, Zhao, Yanping, Xiao, Bingjia, Hu, Jiansheng, Hu, Chundong, Hu, Liqun, Wang, Mao, Xu, Handong, Li, Erzhong, Zeng, Long, Zang, Qing, Liu, Haiqing, Lyu, Bo, Yuan, Q. P., Li, Kedong, Zhang, Bin, Zhang, Jiayuan, Jia, Tianqi, Wu, Muquan, Chen, Jiale, Zhu, Xiang, Li, Miaohui, Zhang, Xinjun, Zhang, Ling, Duan, Yanmin, Wang, Liang, Ding, Rui, Sun, Youwen, Xu, Guo Sheng, Liang, Yunfeng, Xiang, Nong, Wan, Baonian, and Li, Jiangang. EAST steady-state long pulse H-mode with core-edge integration for CFETR. United States: N. p., 2022. Web. doi:10.1088/1741-4326/ac49ad.
Gong, Xianzu, Garofalo, Andrea M., Huang, Juan, Qian, Jinping, Ekedahl, Annika, Maingi, Rajesh, Holcomb, Chris T., Liu, Fukun, Zhao, Yanping, Xiao, Bingjia, Hu, Jiansheng, Hu, Chundong, Hu, Liqun, Wang, Mao, Xu, Handong, Li, Erzhong, Zeng, Long, Zang, Qing, Liu, Haiqing, Lyu, Bo, Yuan, Q. P., Li, Kedong, Zhang, Bin, Zhang, Jiayuan, Jia, Tianqi, Wu, Muquan, Chen, Jiale, Zhu, Xiang, Li, Miaohui, Zhang, Xinjun, Zhang, Ling, Duan, Yanmin, Wang, Liang, Ding, Rui, Sun, Youwen, Xu, Guo Sheng, Liang, Yunfeng, Xiang, Nong, Wan, Baonian, & Li, Jiangang. EAST steady-state long pulse H-mode with core-edge integration for CFETR. United States. https://doi.org/10.1088/1741-4326/ac49ad
Gong, Xianzu, Garofalo, Andrea M., Huang, Juan, Qian, Jinping, Ekedahl, Annika, Maingi, Rajesh, Holcomb, Chris T., Liu, Fukun, Zhao, Yanping, Xiao, Bingjia, Hu, Jiansheng, Hu, Chundong, Hu, Liqun, Wang, Mao, Xu, Handong, Li, Erzhong, Zeng, Long, Zang, Qing, Liu, Haiqing, Lyu, Bo, Yuan, Q. P., Li, Kedong, Zhang, Bin, Zhang, Jiayuan, Jia, Tianqi, Wu, Muquan, Chen, Jiale, Zhu, Xiang, Li, Miaohui, Zhang, Xinjun, Zhang, Ling, Duan, Yanmin, Wang, Liang, Ding, Rui, Sun, Youwen, Xu, Guo Sheng, Liang, Yunfeng, Xiang, Nong, Wan, Baonian, and Li, Jiangang. Tue . "EAST steady-state long pulse H-mode with core-edge integration for CFETR". United States. https://doi.org/10.1088/1741-4326/ac49ad. https://www.osti.gov/servlets/purl/1855250.
@article{osti_1855250,
title = {EAST steady-state long pulse H-mode with core-edge integration for CFETR},
author = {Gong, Xianzu and Garofalo, Andrea M. and Huang, Juan and Qian, Jinping and Ekedahl, Annika and Maingi, Rajesh and Holcomb, Chris T. and Liu, Fukun and Zhao, Yanping and Xiao, Bingjia and Hu, Jiansheng and Hu, Chundong and Hu, Liqun and Wang, Mao and Xu, Handong and Li, Erzhong and Zeng, Long and Zang, Qing and Liu, Haiqing and Lyu, Bo and Yuan, Q. P. and Li, Kedong and Zhang, Bin and Zhang, Jiayuan and Jia, Tianqi and Wu, Muquan and Chen, Jiale and Zhu, Xiang and Li, Miaohui and Zhang, Xinjun and Zhang, Ling and Duan, Yanmin and Wang, Liang and Ding, Rui and Sun, Youwen and Xu, Guo Sheng and Liang, Yunfeng and Xiang, Nong and Wan, Baonian and Li, Jiangang},
abstractNote = {Recent EAST experiment has successfully demonstrated long pulse steady-state high plasma performance scenario and core-edge integration since the last IAEA in 2018. A discharge with a duration over 60s with βP ~2.0, βN ~1.6, H98y2~1.3 and internal transport barrier on electron temperature channel is obtained with multi-RF power heating and current drive. A higher βN (βN~1.8, βp~2.0, H98y2~1.3, ne/nGW~0.75) with a duration of 20s is achieved by using the modulated neutral beam and multi-RF power, where several normalized parameters are close or even higher than the phase III 1GW scenario of CFETR steady-state. High-Z impurity accumulation in the plasma core is well controlled in a low level by using the on-axis ECH. Modelling shows that the strong diffusion of TEM turbulence in the central region prevents tungsten impurity to accumulate. More recently, EAST has demonstrated compatible core-edge integration discharges in the high βp scenario: high confinement H98y2>1.2 with high βP~2.5/βN~2.0 and fbs~50% is sustained with reduced divertor heat flux at high density ne/nGW~0.7 and moderate q95~6.7. By combining active impurity seeding through radiative divertor feedback control and strike point splitting induced by resonant perturbation coil, the peak heat flux is reduced by 20-30% on the ITER-like tungsten divertor, here a mixture of 50% neon and 50% D2 is applied.},
doi = {10.1088/1741-4326/ac49ad},
journal = {Nuclear Fusion},
number = 7,
volume = 62,
place = {United States},
year = {Tue Apr 26 00:00:00 EDT 2022},
month = {Tue Apr 26 00:00:00 EDT 2022}
}

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