HL-3托卡马克反三角位形对等离子体约束性能影响的模拟研究
Simulation study of plasma confinement performance under negative triangularity configuration on the HL-3 tokamak
摘要
Abstract
Exploring advanced magnetic confinement configurations is crucial for achieving high-gain,steady-state commercial fusion reactors.The negative triangularity(NT)configuration has been identified as a potential scenario for future fusion devices due to its advantages,including high core confinement performance,effective power exhaust capability,and the mitigation of high heat loads on device wall materials caused by edge localized modes.In this study,OMFIT is used to investigate the influence and mechanism of the negative triangularity double-null divertor magnetic configuration on plasma confinement performance on HL-3 tokamak.Under matched plasma parameters(current,toroidal field,auxiliary heating,and line-averaged density),simulations reveal that NT L-mode confinement reaches the level of positive triangularity(PT)H-mode.Specifically,key figures of merit—βN,H98,τE,Wth,Wth,e,and Wth,i-under NT are 1.08,1.35,1.18,1.20,1.02,and 1.49 times those of the PT,respectively.Further analysis of plasma thermal transport reveals that the primary reason for the improved confinement performance under the NT configuration is that,within the normalized minor radius range of ρ ≈ 0.2-0.6,the total energy transport(including both electron and ion channels)under the NT configuration is lower than that under the PT configuration.By comparing neoclassical and turbulent transport in total energy transport,it is found that the level of turbulent transport exceeds that of neoclassical transport by 1-2 orders of magnitude.Although the neoclassical energy flux shows little variation between the two configurations,turbulent transport is significantly lower under the NT configuration.Analysis of the linear instability of turbulence modes at ρ=0.32 indicates that under PT,drift wave turbulence is predominantly driven by the ion temperature gradient(ITG)mode and the electron temperature gradient(ETG)mode.Under the NT configuration,drift wave turbulence instabilities are dominated by ETG and trapped electron mode(TEM),which primarily drive electron thermal transport.Meanwhile,the ITG mode is stabilized under this configuration,which likely explains the reduced turbulent energy transport in the ion channel under negative triangularity.关键词
托卡马克装置/集成模拟/反三角位形/湍流输运/TGLFKey words
tokamak/integrated simulation/negative triangularity configuration/turbulent transport/TGLF引用本文复制引用
王哲,肖国梁,郝广周,宋啸,薛雷,龙婷,孙爱萍,李正吉,王卓,李佳鲜,许敏,张毅,石中兵..HL-3托卡马克反三角位形对等离子体约束性能影响的模拟研究[J].物理学报,2026,75(12):238-247,10.基金项目
国家磁约束核聚变能发展研究专项(批准号:2024YFE03190000,2022YFE03100004,2024YFE03180001,2019YFE03040004)、国家自然科学基金(批准号:12575237,12305238)、核技术研发科研项目(批准号:HJSYF2024(02))、四川省自然科学基金(批准号:2025ZNSFSC0059)、中核集团青年英才项目(批准号:2024-QNYC-01)和西物创新项目(批准号:202301XWCX001-01,202301XWCX001-02)资助的课题. Project supported by the National Magnetic Confinement Fusion Energy R&D Program of China(Grant Nos.2024YFE03190000,2022YFE03100004,2024YFE03180001,2019YFE03040004),the National Natural Science Foundation of China(Grant Nos.12575237,12305238),the Nuclear Technology R&D Program(Grant No.HJSYF2024(02)),the Natural Science Foundation of Sichuan Province,China(Grant No.2025ZNSFSC0059),the Youth Talent Program of China National Nuclear Corporation(Grant No.2024-QNYC-01),and the Innovation Program of Southwestern Institute of Physics(Grant Nos.202301XWCX001-01,202301XWCX001-02). （批准号:2024YFE03190000,2022YFE03100004,2024YFE03180001,2019YFE03040004）
