HL-2A 托卡马克边界湍流涡旋结构的测量及其统计参数特征

doi:10.16568/j.0254-6086.202503013

核聚变与等离子体物理 ›› 2025, Vol. 45 ›› Issue (3): 342-348.DOI: 10.16568/j.0254-6086.202503013

HL-2A 托卡马克边界湍流涡旋结构的测量及其统计参数特征

聂林，许敏，柯锐，龙婷，吴婷，王占辉，黄治辉，HL-2A 实验团队

(核工业西南物理研究院，成都 610041)

收稿日期:2025-05-07 修回日期:2025-06-24 出版日期:2025-09-15 发布日期:2025-09-29
作者简介:聂林(1985-)，男，广西人，副研究员，硕士生导师，博士，从事等离子体诊断研发和等离子体输运物理研究。
基金资助:
国家磁约束核聚变能发展研究专项(2019YFE03030003)

The turbulence eddy structure measurement and statistical parameter characteristics in the edge of HL-2A tokamak

NIE Lin, XU Min, KE Rui, LONG Ting, WU Ting, WANG Zhan-hui, HUANG Zhi-hui, HL-2A Experimental Team#br#

(Southwestern Institute of Physics, Chengdu 610041)

Received:2025-05-07 Revised:2025-06-24 Online:2025-09-15 Published:2025-09-29

摘要/Abstract

摘要：

基于结构动力学理论和条件平均方法，采用3×4 阵列探针系统对HL-2A 装置边缘等离子体中的涡旋结构开展了系统性实验研究。首先通过探针信号相关性分析验证了该阵列对等离子体涡旋特征尺度的测量可行性，并采用全悬浮电位测量电路，成功实现了边缘等离子体中正/负极性涡旋旋转速度场的测量，其结果表现出良好的自洽性。实验进一步结合双探针诊断技术，获得了涡旋中心区域的温度、密度及速度分布特性。结果表明，正负涡旋结构中密度与温度扰动、径向速度与极向速度之间均存在显著耦合效应。这一发现为理解涡旋结构在等离子体输运过程中的作用机制提供了重要实验依据，提示涡旋结构可能对边缘等离子体的粒子、能量及动量输运具有重要贡献。

关键词: 湍流, 涡旋结构, 输运, 条件平均

Abstract:

A systematic experimental investigation of eddy structures in the edge plasma of the HL-2A tokamak was developed based on structural kinetic theory and conditional averaging methods, utilizing a 3×4 array probe system. Firstly, the correlation analysis of probe signals verified the feasibility of the array for measuring the characteristic scales of plasma vortices. By employing a fully floating potential measurement circuit, the rotation velocity fields of both positive and negative polarity vortices in the edge plasma were successfully measured, demonstrating good self-consistency in the results. The experiment further integrated double-probe diagnostic techniques to obtain the temperature, density, and velocity distribution characteristics in the eddy central regions. The results reveal significant coupling effects between density and temperature fluctuations as well as between radial and poloidal velocities in both positive and negative eddy structures. This discovery provides crucial experimental evidence for understanding the role of eddy structures in plasma transport processes, suggesting that vortices structures may contribute substantially to the particle, energy and momentum transport in edge plasmas.

Key words: Turbulence, Eddy structures, Transport, Condition average

中图分类号:

O533

聂林, 许敏, 柯锐, 龙婷, 吴婷, 王占辉, 黄治辉, HL-A 实验团队. HL-2A 托卡马克边界湍流涡旋结构的测量及其统计参数特征[J]. 核聚变与等离子体物理, 2025, 45(3): 342-348.

NIE Lin, XU Min, KE Rui, LONG Ting, WU Ting, WANG Zhan-hui, HUANG Zhi-hui, HL-A Experimental Team. The turbulence eddy structure measurement and statistical parameter characteristics in the edge of HL-2A tokamak[J]. Nuclear Fusion and Plasma Physics, 2025, 45(3): 342-348.

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HL-2A 托卡马克边界湍流涡旋结构的测量及其统计参数特征

The turbulence eddy structure measurement and statistical parameter characteristics in the edge of HL-2A tokamak

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