Fundamental Research (Sep 2022)
Recent advances in high-βN experiments and magnetohydrodynamic instabilities with hybrid scenarios in the HL-2A Tokamak
- Wei Chen,
- Liming Yu,
- Min Xu,
- Xiaoquan Ji,
- Zhongbing Shi,
- Xiaoxue He,
- Zhengji Li,
- Yonggao Li,
- Tianbo Wang,
- Min Jiang,
- Shaobo Gong,
- Jie Wen,
- Peiwan Shi,
- Zengchen Yang,
- Kairui Fang,
- Jia Li,
- Lai Wei,
- Wulv Zhong,
- Aiping Sun,
- Jianyong Cao,
- Xingyu Bai,
- Jiquan Li,
- Xuantong Ding,
- Jiaqi Dong,
- Qingwei Yang,
- Yi Liu,
- Longwen Yan,
- Zhengxiong Wang,
- Xuanru Duan
Affiliations
- Wei Chen
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China; Corresponding author.
- Liming Yu
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Min Xu
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Xiaoquan Ji
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Zhongbing Shi
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Xiaoxue He
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Zhengji Li
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Yonggao Li
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Tianbo Wang
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Min Jiang
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Shaobo Gong
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Jie Wen
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Peiwan Shi
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Zengchen Yang
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Kairui Fang
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Jia Li
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Lai Wei
- Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China
- Wulv Zhong
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Aiping Sun
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Jianyong Cao
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Xingyu Bai
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Jiquan Li
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Xuantong Ding
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Jiaqi Dong
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Qingwei Yang
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Yi Liu
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Longwen Yan
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Zhengxiong Wang
- Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China
- Xuanru Duan
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
- Journal volume & issue
-
Vol. 2,
no. 5
pp. 667 – 673
Abstract
Over the past several years, high-βN experiments have been carried out on HL-2A. The high-βN is realized using double transport barriers (DTBs) with hybrid scenarios. A stationary high-βN (>2) scenario was obtained by pure neutral-beam injection (NBI) heating. Transient high performance was also achieved, corresponding to βN≥3, ne/neG∼0.6, H98∼1.5, fbs∼30%, q95∼4.0, and G∼0.4. The high-βN scenario was successfully modeled using integrated simulation codes, that is, the one modeling framework for integrated tasks (OMFIT). In high-βN plasmas, magnetohydrodynamic (MHD) instabilities are abundant, including low-frequency global MHD oscillation with n = 1, high-frequency coherent mode (HCM) at the edge, and neoclassical tearing mode (NTM) and Alfvénic modes in the core. In some high-βN discharges, it is observed that the NTMs with m/n=3/2 limit the growth of the plasma energy and decrease βN. The low-n global MHD oscillation is consistent with the coupling of destabilized internal (m/n = 1/1) and external (m/n = 3/1 or 4/1) modes, and plays a crucial role in triggering the onset of ELMs. Achieving high-βN on HL-2A suggests that core-edge interplay is key to the plasma confinement enhancement mechanism. Experiments to enhance βN will contribute to future plasma operation, such as international thermonuclear experimental reactor .
