EAST托卡马克实验中的L模和H模电子尺度湍流的特征  

Characteristics of electron-scale turbulence in L-mode and H-mode on of EAST Tokamak experiment

作　　者：耿靖森 李亚东 GENG Jingsen;LI Yadong(Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,安徽合肥230601 [2]中国科学院合肥物质科学研究院等离子体物理研究所,安徽合肥230031

出　　处：《安徽大学学报（自然科学版）》2023年第3期44-49,共6页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11875286)。

摘　　要：湍流是托卡马克等离子体反常输运的原因,可能对低约束模式(L-mode)和高约束模式(H-mode)的输运产生重要影响.通过集体汤姆逊散射诊断系统研究EAST(experimental advanced superconducting Tokamak)托卡马克实验中的L模和H模电子尺度湍流的特征.结果表明:第75286号炮放电中的H模的粒子输运得到很大改善而热输运改善不大;等离子体由L模进入H模后,梯度区湍流强度的下降比芯区湍流强度的下降更明显,不同空间区域的湍流强度变化存在差异;H模粒子输运和热输运的差异可能是TEM和ETG波数范围湍流的光谱差异导致的.Turbulence is considered to be responsible for plasma anomalous transport in Tokamak,and it may have an important effect on transport in low confinement mode(L-mode)and high confinement mode(H-mode).The characteristics of electron-scale turbulence in L-mode and H-mode on EAST(experimental advanced superconducting Tokamak)were investigated by the collective Thomson scattering diagnosis system.The results showed that the particle transport of H-mode in the shot number 75286 discharge was greatly improved while the heat transport was not.When the plasma evolved from L-mode to H-mode,the turbulence intensity in the gradient region decreased more obviously than that in the core region,and the variation of turbulence intensity in different spatial regions was different.The differences in particle transport and heat transport in H-mode might be caused by spectral differences in TEM and ETG turbulence wavenumber range.

关 键 词：电子尺度湍流 L模和H模 等离子体输运 集体汤姆逊散射诊断 

分 类 号：O533[理学—等离子体物理]