J-TEXT装置泰勒放电清洗实验研究  

Experimental Study of Taylor Discharge Cleaning for J-TEXT Device

作　　者：巴为刚 陈志鹏 赵乾丞 郝志刚 丁永华[1] 潘垣[1] BA Wei-gang;CHEN Zhi-peng;ZHAO Qian-cheng;HAO Zhi-gang;DING Yong-hua;PAN Yuan(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院磁约束聚变与等离子体国际合作联合实验室,湖北武汉430074

出　　处：《真空》2022年第6期65-72,共8页Vacuum

基　　金：磁约束核聚变能发展研究专项(2018YFE0310300);国家自然科学基金(51821005)。

摘　　要：托卡马克真空室中存在着杂质所产生的线辐射,这会引起等离子体能量损失和氢气燃料浓度降低。因此,为了提高聚变三重积,需要在放电开始前将托卡马克真空室内的轻杂质含量降至较低水平。轻杂质元素主要吸附在装置第一壁上,现阶段主要使用放电清洗手段解吸第一壁上吸附的杂质。本文建立了一套差分抽气质谱分析系统,可在J-TEXT托卡马克装置进行泰勒放电清洗时工作。其可以将主真空室内较高压力的气体引入到配有差分抽气系统的质谱室中进行分析,从而得到清洗过程中各气体分压强的变化,用于监测放电清洗效果。同时,结合磁测量、静电探针、Hα辐射以及CⅢ辐射等诊断系统,测量了清洗过程中等离子体电流、电压、温度、密度和辐射等参数随不同放电清洗参数的变化,为J-TEXT氢气泰勒放电清洗参数优化提供参考。Due to the line radiation generated by light impurities in the Tokamak vacuum chamber,plasma energy is lost and hydrogen fuel concentration is reduced.Therefore,in order to improve the triple product of fusion,it is necessary to reduce the content of light impurities in the Tokamak vacuum chamber to a low level before the discharge starts.Light impurity elements are mainly adsorbed on the first wall of the device.At present,the impurities adsorbed on the first wall are desorbed mainly by means of discharge cleaning.In this paper,a set of differential pumping mass spectrometer analysis system is established,which can be used in Taylor discharge cleaning of J-TEXT Tokamak device.The higher pressure gas in the main vacuum chamber is introduced into the mass spectrometer chamber equipped with differential pumping system for analysis,so as to obtain the change of partial pressure of each gas in the cleaning process,which can be used to monitor the discharge cleaning effect.At the same time,by combining with several diagnostic systems such as magnetic measurement,electrostatic probe,Hαradiation and CⅢradiation,the changes of plasma current,voltage,temperature,density and radiation in the discharge cleaning process are measured when changing the discharge cleaning parameters,providing reference for the optimization of J-TEXT hydrogen Taylor discharge cleaning parameters.

关 键 词：泰勒放电清洗 差分抽气 质谱分析 参数优化 

分 类 号：TL6[核科学技术—核技术及应用] O657.6[理学—分析化学]