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

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

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The dynamics of long-wavelength(kθ＜1.4 cm-1),broadband(20 kHz-200 kHz)electron temperature fluctuations((T)e/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 × 1019m-3-1.20 × 1019m-3)scenario,after gas-puffing the core temperature increases and the edge tem-perature 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 × 1019 m-3-2.02 × 1019 m-3)scenario,the phenomena are not observed.Furthermore,compelling evidence indicates that E x 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.

nuclear fusionnon-local transporttokamakgas-puffing

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

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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

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National Key Research and Development Program of ChinaInnovation Program of Southwestern Institute of PhysicsSichuan science and Technology ProgramSichuan science and Technology ProgramNational Natural Science Foundation of ChinaShenzhen Municipal Collaborative Innovation Technology Program-International Science and Technology Cooperation Project

2017YFE0301203202301XWCX0012023ZYD00142021YFSY004412175055GJHZ20220913142609017

2024

10.1088/1674-1056/ad1093

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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