高温等离子体中高Z金属杂质的观测及其行为研究  

Observation and Behavior of High Z Metal Impurities in High Temperature Plasma

作　　者：沈永才 何梁 SHEN Yongcai;HE Liang(School of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]合肥师范学院物理与材料工程学院,安徽合肥230601 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《安庆师范大学学报（自然科学版）》2022年第4期17-23,共7页Journal of Anqing Normal University(Natural Science Edition)

基　　金：安徽省自然科学基金(2008085QA39);安徽高校协同创新项目(GXXT-2021-029)。

摘　　要：国际热核聚变实验堆及中国聚变工程实验堆采用高Z金属杂质钨作为偏滤器材料,但以钨为主的金属材料由于溅射作用会进入等离子体,从而极易在等离子体芯部聚集。芯部过高的金属杂质含量会对等离子体放电带来极大负面影响,对高温等离子体中的金属杂质进行测量及其行为研究,并探索金属杂质含量控制对于实现高温等离子体的稳态运行至关重要。本文以东方超环托卡马克为例,介绍了高温等离子体芯部金属杂质的测量方法,研究了金属杂质在不同放电条件下的行为。采用基于平场光栅的软X射线和极紫外光谱诊断观测不同条件下的杂质辐射光谱,对金属杂质行为进行研究,并采用多种实验手段在一定程度上抑制了芯部金属杂质聚芯行为。Tungsten has been chosen as the material of divertor-plate of International Thermonuclear Experimental Reactor and China Fusion Engineering Experimental Reactor.As high-Z impurity,tungsten accumulation will occur with a high possibility,which resulting in great negative effects on plasma discharge parameters.It is very important to control high-Z impurity content and avoid impurity accumulation for the realization of steady-state high-performance operation in future nuclear devices.Taking the experimental advanced superconductor Tokamak as an example,this paper introduces the measurement method of metal impurities in the core of high temperature plasma,and the behavior of metal impurities under different discharge conditions is studied based on the measurement of metal impurities.For the impurities in the core plasma,soft X-ray and extreme ultraviolet spectroscopy based on the flat field grating is used to diagnose the impurities.The behavior of metal impurities was studied under different discharge conditions.And the results shows that the intensity of core area metal impurities can be suppressed to a certain extent by several methods.

关 键 词：等离子体 杂质测量 光谱诊断 杂质聚芯 

分 类 号：T161.1[一般工业技术]