HT-7超导托卡马克装置真空系统参数的标定及分析  

Calibration and Analysis of HT-7 Vacuum System

作　　者：胡建生[1] 辜学茂[1] 王小明[1] 罗南昌[1] HT-7真空组 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《真空科学与技术学报》2004年第2期149-153,共5页Chinese Journal of Vacuum Science and Technology

摘　　要：主要介绍HT 7超导托卡马克装置真空系统参数的标定和分析。在有无低温泵工作条件下 ,分别测量了HT 7真空系统对氢气、氘气、氦气和氮气的抽速曲线。分析包括器壁吸附等因素对HT 7真空系统不同气体抽速的影响。同时简单分析了在不同情况下 ,装置真空分布情况 ,为实现HT 7装置气体平衡提供参考。讨论和测量如何利用质谱计来分氦和氘。Calibration and analysis of the vacuum system of HT 7 superconductor Tokamak were discussed.Pumping speeds of various gases,including hydrogen,deuterium,helium and nitrogen with or without cryogenic pumps,were measured,respectively.Influence of gases adsorption on their specific pumping speeds,such as hydrogen and deuterium adsorbed by solid surfaces of the walls and the graphite spacers in HT 7 inner vacuum system,was analyzed.The variations in the base pressure in different situations,at different locations of the whole vacuum system were tentatively evaluated to achieve better equilibrium of the gases for the HT 7 system.The feasibility of using quadropole mass spectroscopy to differentiate helium and deuterium was discussed.The total volume of HT 7 can be precisely measured when the gases reach equilibrium.

关 键 词：HT-7 超导托卡马克装置 真空系统 参数标定 抽速曲线 质谱计 气体平衡 

分 类 号：TB753[一般工业技术—真空技术] TB771