Strategy and experimental progress of the EXL-50U spherical torus in support of the EHL-2 project  

作　　者：Yuejiang SHI Xianming SONG Dong GUO Xinchen JIANG Xiang GU Lili DONG Xueyun WANG Tiantian SUN Muzhi TAN Zhengyuan CHEN Guang YANG Danke YANG Huasheng XIE Hanyue ZHAO Yong LIU Renyi TAO Jia LI Songjian LI Fan GAO Yihang ZHAO Yupeng ZHANG Cong ZHANG Hongda HE Enwu YANG Yuanming YANG Yu WANG Shaodong SONG Lei HAN Bo XING Pengmin LI Zhenxing WANG Peihai ZHOU Wenwu LUO Yumin WANG Bing LIU Chao WU Xin ZHAO Yunfeng LIANG Jiaqi DONG Baoshan YUAN Y-K Martin PENG Minsheng LIU the EXL-50U Team 石跃江;宋显明;郭栋;姜欣辰;顾翔;董力立;王雪韵;孙恬恬;谭沐芝;陈正元;杨光;杨丹可;谢华生;赵寒月;刘勇;陶仁义;李佳;李松建;高凡;赵毅航;张宇鹏;张聪;何宏达;杨恩武;杨圆明;王宇;宋绍栋;韩磊;邢博;李鹏敏;王振兴;周培海;罗文武;王嵎民;刘兵;吴超;赵鑫;梁云峰;董家齐;袁保山;彭元凯;刘敏胜;the EXL-50U Team

机构地区：[1]Hebei Key Laboratory of Compact Fusion,Langfang 065001,People’s Republic of China [2]ENN Science and Technology Development Co.Ltd.,Langfang 065001,People’s Republic of China [3]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China [4]Forschungszentrum Jülich GmbH,Institute of Fusion Energy and Nuclear Waste Management-Plasmaphysik,Jülich 52425,Germany

出　　处：《Plasma Science and Technology》2025年第2期34-44,共11页等离子体科学和技术(英文版)

基　　金：supported by ENN Group and ENN Energy Research Institute.

摘　　要：The EXL-50U is China’s first large spherical torus device with a toroidal field reaching 1 T.The major radius of the EXL-50U ranges from 0.6 m to 0.8 m,with an aspect ratio of 1.4−1.8.The goal of plasma current in the first experimental phase is 500 kA,and in the future second phase,the goal of plasma current is 1 MA.On the EXL-50U project,the ENN fusion team expeditiously accomplished a series of comprehensive tasks including physical and engineering design,main component construction installation,and system commissioning,all within a mere eighteen-month timeframe.In the experiments of 2024,the EXL-50U achieved a 500 kA limiter configuration discharge using ECRH(Electron Cyclotron Resonance Heating)for non-inductive current start-up and a current ramp-up with the synergetic effect of ECRH and central solenoid(CS).Preliminary divertor configuration plasmas were also obtained under 200 kA plasma current.The core ion temperature of 1 keV was achieved with low-power NBI heating,and the energy confinement time of 30 ms was reached with Ohmic heating in the flat-top phase.The current and future experiments of EXL-50U will strongly support the physical design and operational scenarios of EHL-2 in the areas of current drive,high ion temperature exploration,energy transport and confinement,and hydrogen-boron physical characteristics.At the same time,the experience in the design,construction,and commissioning of the engineering,heating,and diagnostics systems on EXL-50U is also very beneficial for enhancing the feasibility of the engineering design for EHL-2.

关 键 词：EXL-50U EHL-2 spherical torus 

分 类 号：TL631.24[核科学技术—核技术及应用]