HL-2A托卡马克上slide-away放电特征研究  

Characteristics of slide-away discharges in the HL-2A Tokamak

作　　者：竹锦霞[1,2] 王光琼 李强 ZHU Jinxia;WANG Guangqiong;LI Qiang(Institute of Innovation and Development Research,Sichuan University of Arts and Science,Dazhou Sichuan 635000;School of Intelligent Manufacturing,Sichuan University of Arts and Science,Dazhou Sichuan 635000)

机构地区：[1]四川文理学院智能制造产业技术研究院,四川达州635000 [2]四川文理学院智能制造学院,四川达州635000

出　　处：《首都师范大学学报（自然科学版）》2023年第3期23-27,共5页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金项目(11775068);国家磁约束核聚变能发展研究专项项目(2019YFE03010001)。

摘　　要：托卡马克装置上等离子体不稳定性会被非麦克斯韦分布的逃逸电子激发。逃逸电子在特定条件下会与不稳定性发生反常多普勒共振,此共振结果将降低逃逸电子的能量,减小对装置造成的危害。本文利用电子回旋辐射(ECE)等诊断系统分析了HL-2A上slide-away放电中反常多普勒共振特征。实验结果表明:slide-away放电模式下ECE信号主要有台阶型、指数型、指数-台阶型和双波型4类波形。统计显示不稳定性阈值与等离子体电流以及磁场强度值无线性关系。反常多普勒不稳定性阈值(ωpe/ωce)统计分布范围约为0.17~0.80,其中最高值分布范围为0.35~0.40。The plasma instability can be excited by the runaway electrons with non-Maxwell distribution in Tokamak.Under certain conditions,the runaway electrons will have abnormal Doppler resonance with instability,which will reduce the energy of runaway electrons and reduce the harm caused by the runaway electrons to the device.In terms of electron cyclotron emission(ECE)and related diagnosis systems,characteristics of slide-away discharges with the anomalous Doppler resonance have been investigated in the HL-2A Tokamak.The experimental results show that ECE signals in slide-away discharge mode mainly have four kinds of waveforms:step type,exponential type,exponential step type and double wave type.The statistical results show that the instability threshold has a wireless relationship with plasma current and magnetic field intensity.The statistical distribution of abnormal Doppler instability threshold(ωpe/ωce)was 0.17 to 0.80,of which the highest value ranges was 0.35 to 0.40.

关 键 词：托卡马克 slide-away放电 逃逸电子 反常多普勒共振 阈值 

分 类 号：O53[理学—等离子体物理]