Overview of recent experimental results on the EAST Tokamak
X.Z. Gong, on behalf of EAST Team and Collaborators, The EAST Team:, Yuntao Song, Baonian Wan, Jiangang Li, Yuanxi Wan, Xinchao Wu, Fukun Liu, Junling Chen, Jiansheng Hu, Guosheng Xu, Kun Lü, Xianzu Gong, Bingjia Xiao, Yu Wu, Xiang Gao, Damao Yao, Nong Xiang, Liqun Hu, Chundong Hu, J. Wu, Biao Shen, Ge Gao, Yiyun Huang, Liuwei Xu, Qiyong Zhang, Cheonho Bae, Bin Cao, Lei Cao, Jiafeng Chang, Dalong Chen, Ran Chen, Xiaojiao Chen, Yebin Chen, Yue Chen, Yunxin Cheng, Yong Cheng, Bojiang Ding, Fang Ding, Rui Ding, Shijun Du, Yanmin Duan, Jia Fu, Daming Gao, Wei Gao, Yongqi Gu, Bin Guo, Fei Guo, Yong Guo, Xiaofeng Han, Shiying He, Ailan Hu, Chang Hu, Guanghai Hu, Huaichuan Hu, Qingsheng Hu, Yanlan Hu, Zhenhua Hu, J. Huang, Liansheng Huang, Ming Huang, Ronglin Huang, Xiang Ji, Hua Jia, Caichao Jiang, Yinxian Jie, Songqing Ju, Defeng Kong, Erzhong Li, Guoqiang Li, Jiahong Li, Junjun Li, Miaohui Li, Pan Li, Kedong Li, Li Shi, Yadong Li, Lizhen Liang, Yanchuan Liao, Shiyao Lin, Xin Lin, Bili Ling, Haiqing Liu, Huajun Liu, Jianwen Liu, L. Liu, Shaocheng Liu, Sheng Liu, Wenbin Liu, Xiaoju Liu, Xiaoyan Liu, Yong Liu, Zhihong Liu, Zhimin Liu, Jianhua Lu, Zhengping Luo, Dengkui Ma, Huafeng Mao, Wendong Ma
Abstract
Abstract Since the last IAEA-FEC in 2021, significant progress on the development of long pulse steady state scenario and its related key physics and technologies have been achieved, including the reproducible 403 s long-pulse steady-state H-mode plasma with pure radio frequency (RF) power heating. A thousand-second time scale (∼1056 s) fully non-inductive plasma with high injected energy up to 1.73 GJ has also been achieved. The EAST operational regime of high β P has been significantly extended ( H 98y2 > 1.3, β P ∼ 4.0, β N ∼ 2.4 and n e / n GW ∼ 1.0) using RF and neutral beam injection (NBI). The full edge localized mode suppression using the n = 4 resonant magnetic perturbations has been achieved in ITER-like standard type-I ELMy H-mode plasmas with q 95 ≈ 3.1 on EAST, extrapolating favorably to the ITER baseline scenario. The sustained large ELM control and stable partial detachment have been achieved with Ne seeding. The underlying physics of plasma-beta effect for error field penetration, where toroidal effect dominates, is disclosed by comparing the results in cylindrical theory and MARS-Q simulation in EAST. Breakdown and plasma initiation at low toroidal electric fields (<0.3 V m −1 ) with EC pre-ionization is developed. A beneficial role on the lower hybrid wave injection to control the tungsten concentration in the NBI discharge is observed for the first time in EAST suggesting a potential way toward steady-state H-mode NBI operation.