EAST-NBI主低温冷凝泵防辐射挡板的传输几率计算  

Calculation of the transmission probability for the radiation baffle of EAST-NBI primary cryo-condensation pump

作　　者：程斌[1] 胡纯栋[1] 谢远来[1] 崔奎[1] 马长城[1,2] 杨思皓 邑伟 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031 [2]中国科学技术大学,合肥230039

出　　处：《低温与超导》2016年第8期8-10,共3页Cryogenics and Superconductivity

基　　金：国家自然科学基金(11575240);中国科学院等离子体物理研究所基金(DSJJ-15-GC02);中国科学院等离子体物理研究所基金(DSJJ-14-JC07)

摘　　要：采用低温冷凝泵来实现束生成与传输所需的真空环境是兆瓦级中性束注入器研制中的合理选择。低温冷凝泵由防辐射挡板和低温冷凝板两部分组成。防辐射挡板的传输几率是影响主低温冷凝泵性能的重要参数。通过蒙特卡洛法模拟气体分子运动过程,分析计算了主低温冷凝泵防辐射挡板的传输几率,以及主低温冷凝泵的抽速,为防辐射挡板的优化设计提供了理论指导。In the development of the MW- scale neutral beam injector （NBI） , it is a rational approach to adopt a cryo - condensation pump to ensure the vacuum required for beam generation and transmission. The cryo - condensation pump comprises radiation shield baffle and cryo - condensation plate. The transmission probability of the radiation shield baffle is one of the im- portant parameters that impact the performance of the primary cryo - condensation pump. The Monte Carlo method was employed to simulate the movements of the gas molecules and to calculate the transmission probability of the radiation shield baffle as well as the pumping speed of the primary cryo - condensation pump. The results will provide theoretical elements to optimize the radi- ation shield baftle.

关 键 词：主低温冷凝泵 防辐射挡板 传输几率 蒙特卡洛 

分 类 号：TL629[核科学技术—核技术及应用]