摘要
利用程序ORBIT和TRANSP/NUBEAM模拟研究全超导托卡马克实验装置(EAST)等离子体位形和杂质的特征参数Z_(eff)(有效电荷数)对束离子约束和加热的影响。结果表明:在等离子体位形中,随着最后一个封闭通量表面与中面外容器壁之间的距离(gapout)和环向磁场强度的增加,快离子的损失(包含瞬时损失和波纹损失)也随之减少,因此中性束的加热效率随着gapout的增加而提高。此外,随着背景等离子体杂质的增加(即Zeff的增加),增加了束损失,导致最后束加热效率降低。选择合适的磁位形,同时降低背景的杂质含量可以增强快离子约束,提高束的加热效率。
Effects of plasma configuration and effective ion charge(Z_(eff))with neutral beam heating on EAST are studied with guiding center codes ORBIT and TRANSP/NUBEAM.The resultes show that the fast-ion loss(including prompt and ripple losses)decreases as the distance between the last closed flux surface and the outer vessel wall in the mid-plane(gapout)and the toroidal magnetic field increases in the magnetic configuration.As a result the beam-ion confinement are enhanced and the heating efficiency is increased.Moreover,as the background plasma impurities increase,i.e.,Zeff increases the beam-ion loss increases,resulting in the reduction of beam-ion heating efficiency.Thus,choosing appropriate magnetic configuration and reducing the background impurity content enhance the fast-ion confinement and improve the beam heating efficiency.
作者
刘源煜
向东
龚学余
路兴强
LIU Yuanyu;XIANG Dong;GONG Xueyu;LU Xingqiang(School of Nuclear Science and Technology,University of South China,Hengyang,Hunan 421001,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;College of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai,Shandong 264005,China)
出处
《计算物理》
CSCD
北大核心
2023年第3期282-290,共9页
Chinese Journal of Computational Physics
基金
国家重点研发计划(2017YFE0300404)
国家自然科学基金(12175272)
湖南省自然科学基金(2020JJ4075)资助项目。
关键词
中性束注入
磁位形
有效电荷数
快离子约束
快离子损失
neutral beam injection
magnetic configuration
effective ion charge
fast-ion confinement
fast-ion loss
