J-TEXT托卡马克装置间歇性爆发事件的实验研究  

Experimental Study on Intermittent Burst Events in J-TEXT Tokamak Device

作　　者：杨宇 赵开君 谢耀禹 陈志鹏 陈忠勇[2] 高丽[2] 王能超[2] 丁肖冠 胡莹欣 温思宇 YANG Yu;ZHAO Kaijun;XIE Yaoyu;CHEN Zhipeng;CHEN Zhongyong;GAO Li;WANG Nengchao;DING Xiaoguan;HU Yingxin;WEN Siyu(School of Nuclear Science and Engineer,East China University of Technology,Nanchang 330013,China;State Key Laboratory of Advanced Electromagnetic Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]东华理工大学核科学与工程学院,南昌330013 [2]华中科技大学电气与电子工程学院磁约束聚变与等离子体国际合作联合实验室,强电磁技术全国重点实验室,武汉430074

出　　处：《能源研究与管理》2024年第1期96-103,共8页Energy Research and Management

基　　金：国家自然科学基金项目(12075057);创新群体项目(51821005)。

摘　　要：为研究密度对J-TEXT托卡马克边缘湍流及间歇性爆发事件的影响,采用往复式朗缪尔静电探针测量边缘等离子体参数,采用概率分布函数以及条件平均等分析方法,详细比较了不同线积分密度情况下边缘等离子体电子温度、密度、电位和径向电场等径向分布及涨落特征。结果表明:随着等离子体密度的增加,边缘电子温度降低,在最后闭合磁面附近的E×B剪切流减弱;密度涨落在刮削层(SOL)具有更大的正偏度与峰度,涨落幅度>1.5倍标准差的气泡(blobs)所引起的粒子输运占总输运的占比从25%上升到45%;但blobs爆发的时间间隔不依赖于积分密度,保持在35μs左右。因此,随着密度增加,blobs对边缘输运的影响更大。Explore the effect of density on edge turbulence and intermittent burst events of the J-TEXT tokamak,a reciprocating Langmuir electrostatic probe was used to measure edge plasma parameters,and analytical methods such as probability distribution function and conditional average were used to compare the radial distribution and fluctuation characteristics of edge plasma electron temperature,density,potential,and radial electric field under different line integral densities.The results indicate that as the plasma density increases,edge electron temperature decreases,the E×B shear flow near the last closed flux surface weakens,and the density fluctuations have greater positive skewness and kurtosis in the scrape off layer(SOL).The proportion of particle transportation caused by blobs with fluctuations greater than 1.5 times the standard deviation has increased from 25%to 45%of the total transportation.However,the time interval of blobs bursts does not depend on density and remains around 35μs.Therefore,blobs have a greater effect on edge transport as density increases.

关 键 词：托卡马克 BLOBS 径向输运 剪切流 静电探针 

分 类 号：TL631.24[核科学技术—核技术及应用]