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OA
Simulation study of plasma confinement performance under negative triangularity configuration on the HL-3 tokamak
探索先进磁约束位形,对实现稳态高增益的商用聚变堆而言至关重要.反三角位形因其兼顾较高的芯部约束性能、良好的功率排出功能且能有效缓解边缘局域模对装置壁材料造成的高热负荷等突出优势,被列为未来聚变堆装置潜在的运行模式之一.本文针对中国环流三号(HL-3)托卡马克磁约束聚变装置,利用OMFIT(one modeling framework for integrated tasks)集成模拟平台,研究了反三角双零偏滤器磁位形结构对等离子体约束性能的影响及机理.模拟结果表明,在相近的等离子体电流、环向磁场、辅助加热功率和线平均密度条件下,反三角位形低约束模式的约束性能可达到正三角位形高约束模式的约束水平:反三角位形的归一化比压βN是正三角位形的1.08倍,能量约束时间τE为正三角位形的1.18倍,能量约束因子H98是正三角位形的1.35倍,等离子体热储能Wth是正三角位形的1.20倍.进一步分析等离子体热输运发现,导致反三角位形能获得较好约束性能的主要原因是,在归一化小半径ρ ≈ 0.2-0.6区间内,反三角位形的总能量输运(包括电子通道和离子通道)低于正三角位形.通过对比总能量输运中的新经典输运和湍流引起的湍性输运可知,湍性输运水平比新经典输运水平高出 1-2个量级.虽然反三角位形的新经典能量输运通量与正三角位形相差不大,但其湍性输运低于正三角位形.对于在归一化小半径ρ=0.32位置处湍流模式的线性不稳定性分析表明,正三角位形中漂移波湍流不稳定性主要是电子温度梯度模和离子温度梯度模;反三角位形则是电子温度梯度模和捕获电子模不稳定性占主导,反三角位形下离子温度梯度模是致稳的.
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.
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
核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225中国聚变能源有限公司,聚变工程设计所,上海 201100中国聚变能源有限公司,聚变工程设计所,上海 201100核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225中国聚变能源有限公司,聚变工程设计所,上海 201100复旦大学现代物理研究所,核科学与技术系,上海 200433核工业西南物理研究院,聚变科学所,成都 610225核工业西南物理研究院,聚变科学所,成都 610225
托卡马克装置集成模拟反三角位形湍流输运TGLF
tokamakintegrated simulationnegative triangularity configurationturbulent transportTGLF
《物理学报》 2026 (12)
238-247,10
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).
评论