Long radial coherence of electron temperature fluctuations in non-local transport in HL-2A plasmas  

作　　者：石中兵 方凯锐 李景春 邹晓岚 卢兆旸 闻杰 王占辉 丁玄同 陈伟 杨曾辰 蒋敏 季小全 佟瑞海 李永高 施陪万 钟武律 许敏 Zhongbing Shi;Kairui Fang;Jingchun Li;Xiaolan Zou;Zhaoyang Lu;Jie Wen;Zhanhui Wang;Xuantong Ding;Wei Chen;Zengchen Yang;Min Jiang;Xiaoquan Ji;Ruihai Tong;Yonggao Li;Peiwan Shi;Wulyv Zhong;Min Xu(Southwestern Institute of Physics,Chengdu 610041,China;Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen 518055,China;Shenzhen Key Laboratory of Nuclear and Radiation Safety,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;CEA,IRFM,Saint-Paul-lez-Durance 13108,France)

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,China [2]Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen 518055,China [3]Shenzhen Key Laboratory of Nuclear and Radiation Safety,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China [4]CEA,IRFM,Saint-Paul-lez-Durance 13108,France

出　　处：《Chinese Physics B》2024年第2期413-420,共8页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2017YFE0301203);the Innovation Program of Southwestern Institute of Physics(Grant No.202301XWCX001);the Sichuan Science and Technology Program(Grant Nos.2023ZYD0014 and 2021YFSY0044);the National Natural Science Foundation of China(Grant No.12175055);the Shenzhen Municipal Collaborative Innovation Technology Program-International Science and Technology Cooperation Project(Grant No.GJHZ20220913142609017)。

摘　　要：The dynamics of long-wavelength(kθ<1.4 cm^(-1)),broadband(20 kHz–200 kHz)electron temperature fluctuations(Te/Te)of plasmas in gas-puff experiments are observed for the first time in HL-2A tokamak.In a relatively low density(ne(0)■0.91×10^(19)m^(-3)–1.20×10^(19)m^(-3))scenario,after gas-puffing the core temperature increases and the edge temperature drops.On the contrary,temperature fluctuation drops at the core and increases at the edge.Analyses show the non-local emergence is accompanied with a long radial coherent length of turbulent fluctuations.While in a higher density(ne(0)?1.83×10^(19)m^(-3)–2.02×10^(19)m^(-3))scenario,the phenomena are not observed.Furthermore,compelling evidence indicates that E×B shear serves as a substantial contributor to this extensive radial interaction.This finding offers a direct explanatory link to the intriguing core-heating phenomenon witnessed within the realm of non-local transport.

关 键 词：nuclear fusion non-local transport TOKAMAK gas-puffing 

分 类 号：TL631.24[核科学技术—核技术及应用]