磁场位形对内交换模不稳定性影响的研究  

Research of the instability of internal interchange mode with different magnetic configurations

作　　者：高正坤 杨文军 龚学余[1] 钟翊君 GAO Zheng-kun;YANG Wen-jun;GONG Xue-yu;ZHONG Yi-jun(University of South China,School of Nuclear Science and Technology,Hengyang 421001;University of South China,School of Electrical Engineering,Hengyang 421001)

机构地区：[1]南华大学核科学技术学院,衡阳421001 [2]南华大学电气工程学院,衡阳421001

出　　处：《核聚变与等离子体物理》2025年第1期104-110,共7页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束核聚变能发展研究专项(2018YFE0309101);国家自然科学基金(12005100);湖南省国际合作基地项目(2018WK4009);衡阳市科学技术发展计划(衡阳市重点实验室2018KJ108)。

摘　　要：基于J-TEXT装置参数,采用VMEC程序,设计了4种等离子体电流分布与安全因子分布的磁场位形。使用Mercier判据来对不同磁场位形下的内交换模不稳定性进行判定,分析了4种磁剪切——正磁剪切、无磁剪切、反磁剪切和弱正剪切对Mercier判据的影响,发现正磁剪切抑制内交换模不稳定性的效果最好,而且正磁剪切越强烈,其对内交换模不稳定性的抑制作用越好。Four magnetic configurations with different plasma current and safety factor distributions based on the parameters of the J-TEXT tokamak were designed with the VMEC code.The Mercier criterion is used to figure out the instability of the internal interchange mode under different magnetic configurations,and the source of the instability is also analyzed.It is found that the magnetic shear term plays a dominant role in the Mercier criterion and the positive magnetic shear has the dominant effect on suppressing the instability of interchange modes.The stronger the positive magnetic shear is,the better the suppression effect on the instability of the interchange mode.

关 键 词：内交换模 磁场位形 理想磁流体不稳定性 

分 类 号：TL612[核科学技术—核技术及应用]