Thermal Analysis and Optimization for Cryopanel of NBI Cryocondensation Pump  

作　　者：胡纯栋 谢远来 欧阳峥嵘 

机构地区：[1]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

出　　处：《Plasma Science and Technology》2008年第1期117-120,共4页等离子体科学和技术（英文版）

基　　金：National Natural Science Foundation of China(No.10575105)

摘　　要：Excellent vacuum performance ensures a high beam transmission efficiency of the neutral beam injector （NBI）. The vacuum performance is mainly determined by the cryoperformance of the cryopanel of the cryocondensation pumps which are the main vacuum pumps of NBI. In order to optimize the cryoperformance, the requirements for the temperature distribution and the heat load of the cryopanel are analysed and the factors that affect the cryopanel＇s temperature distribution are studied. The results indicate that the temperature difference of the cryopanel can be reduced by fabricating the cryopanel with high thermal conductivity material, increasing its thickness and cutting the distance between the two upward cooling pipes. The results may be applied to a cryopanel cooled by forced flow liquid helium.Excellent vacuum performance ensures a high beam transmission efficiency of the neutral beam injector （NBI）. The vacuum performance is mainly determined by the cryoperformance of the cryopanel of the cryocondensation pumps which are the main vacuum pumps of NBI. In order to optimize the cryoperformance, the requirements for the temperature distribution and the heat load of the cryopanel are analysed and the factors that affect the cryopanel＇s temperature distribution are studied. The results indicate that the temperature difference of the cryopanel can be reduced by fabricating the cryopanel with high thermal conductivity material, increasing its thickness and cutting the distance between the two upward cooling pipes. The results may be applied to a cryopanel cooled by forced flow liquid helium.

关 键 词：thermal analysis cryoperformance cryocondensa tion pump NBI vacuum system 

分 类 号：TB61[一般工业技术—制冷工程]