Transport analysis of the EHL-2 spherical torus in a high-ion-temperature scenario  

作　　者：Xueyun WANG Wenjun LIU Danke YANG Guang YANG Muzhi TAN Xinchen JIANG Huasheng XIE Yuejiang SHI Hanyue ZHAO Yumin WANG Yunfeng LIANG Jiaqi DONG Bin WU Chengyue LIU the EHL-2 Team 王雪韵;刘文军;杨丹可;杨光;谭沐芝;姜欣辰;谢华生;石跃江;赵寒月;王嵎民;梁云峰;董家齐;吴斌;刘成岳;the EHL-2 Team(Hebei Key Laboratory of Compact Fusion,Langfang 065001,People’s Republic of China;ENN Science and Technology Development Co.,Ltd.,Langfang 065001,People’s Republic of China;Forschungszentrum Jülich GmbH,Institute of Fusion Energy and Nuclear Waste Management-Plasmaphysik,Jülich 52425,Germany;Southwestern Institute of Physics,Chengdu 610225,People’s Republic of China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230026,People’s Republic of China;School of Physics,Hefei University of Technology,Hefei 230009,People’s Republic of China)

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]Forschungszentrum Jülich GmbH,Institute of Fusion Energy and Nuclear Waste Management-Plasmaphysik,Jülich 52425,Germany [4]Southwestern Institute of Physics,Chengdu 610225,People’s Republic of China [5]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230026,People’s Republic of China [6]School of Physics,Hefei University of Technology,Hefei 230009,People’s Republic of China

出　　处：《Plasma Science and Technology》2025年第2期75-86,共12页等离子体科学和技术(英文版)

基　　金：supported by the ENN Group and ENN Energy Research Institute;supported by National Natural Science Foundation of China(No.12475210).

摘　　要：EHL-2 is an ENN second-generation device aimed at studying proton-boron(p-11B)fusion reactions in a spherical torus.The design parameters are Ti0~30 keV,Ti/Te>2,n_(e0)~1×10^(20)m^(-3),I_(p)~3 MA,B_(t)~3 T,andτ_(E)~0.5 s.High ion temperature is one of the standard operation scenarios of EHL-2,aiming to reduce bremsstrahlung radiation while enhancing plasma parameters by elevating the ion to electron temperature ratio.In order to achieve high ion temperature,neutral beam injection is considered the primary heating method during the flat-top phase.The neutral beam system for EHL-2 comprises 3-5 beams with energy/power ranging from 60 keV/4 MW,80-100 keV/10 MW,to 200 keV/3 MW.This work conducts predictive analysis on core transport during the flat-top phase of EHL-2’s high-ion-temperature scenario utilizing ASTRA.The study delineates the potential operating range of core temperature and other parameters given the designed heating capacity.Specifically,the study presents predictive simulations based on CDBM,GLF23,Bohm-gyro-Bohm,and IFSPPPL transport models,evaluating the steady-state power balance,energy confinement time,and impact of various parameters such as plasma density and NBI power on core ion temperature.The simulations demonstrate that the design parameters of the EHL-2 high-Ti scenario,although sensitive to varying transport models,are hopefully attainable as long as adequate ion heating and controlled ion transport levels are ensured.

关 键 词：TRANSPORT ASTRA hot-ion mode spherical torus 

分 类 号：F42[经济管理—产业经济]