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Chen W, Yu L, Xu M, Ji X, Shi Z, He X, Li Z, Li Y, Wang T, Jiang M, Gong S, Wen J, Shi P, Yang Z, Fang K, Li J, Wei L, Zhong W, Sun A, Cao J, Bai X, Li J, Ding X, Dong J, Yang Q, Liu Y, Yan L, Wang Z, Duan X. Recent advances in high- β N experiments and magnetohydrodynamic instabilities with hybrid scenarios in the HL-2A Tokamak. FUNDAMENTAL RESEARCH 2022; 2:667-673. [PMID: 38933129 PMCID: PMC11197780 DOI: 10.1016/j.fmre.2021.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/25/2021] [Accepted: 12/28/2021] [Indexed: 10/19/2022] Open
Abstract
Over the past several years, high- β N experiments have been carried out on HL-2A. The high- β N is realized using double transport barriers (DTBs) with hybrid scenarios. A stationary high- β N ( > 2 ) scenario was obtained by pure neutral-beam injection (NBI) heating. Transient high performance was also achieved, corresponding toβ N ≥ 3 , n e / n e G ∼ 0.6 ,H 98 ∼ 1.5 ,f b s ∼ 30 % ,q 95 ∼ 4.0 , and G ∼ 0.4 . The high- β N scenario was successfully modeled using integrated simulation codes, that is, the one modeling framework for integrated tasks (OMFIT). In high- β N 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- β N discharges, it is observed that the NTMs with m / n = 3 / 2 limit the growth of the plasma energy and decrease β N . 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- β N on HL-2A suggests that core-edge interplay is key to the plasma confinement enhancement mechanism. Experiments to enhance β N will contribute to future plasma operation, such as international thermonuclear experimental reactor .
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Affiliation(s)
- Wei Chen
- Joint Laboratory for Fusion Product and Energetic Particle, Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
| | - 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
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