兰州重离子冷却储存环(HIRFL-CSR)超高真空系统  

Ultra High Vacuum System of HIRFL-CSR

作　　者：杨晓天[1] 张新俊[1] 张军辉[1] 吴慧敏[1] 牛志伟[1] 侯生军[1] 蒙峻[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《真空》2000年第2期20-25,共6页Vacuum

摘　　要：为了减少真空系统中残余气体分子对离子束造成的损失 ,要求重离子冷却储存环的平均工作真空度达到 3× 10 -9Pa( N2 等效压力 )。在大系统中达到如此高的真空度在我国尚属首例。围绕如何达到这个设计指标的问题 ,本文从真空系统布局、真空室材料、结构及加工焊接要求、降低材料表面出气率的措施、真空系统配置、烘烤系统设计、真空系统控制要求。To minimize the beam loss due to charge exchange of very heavy ions with the residual gas moleculae, ultra high vacuum of 3×10 9 Pa is required for the HIRFL CSR facility. This is the first time to require so high vacuum in a large equipment. In this article we describe:(1)design and layout of the vacuum system; (2)material selection, vacuum structure design, vacuum processing and welding; (3)the measure of reducing the outgassing rate of the materials; (4)the equipment for the vacuum system; (5)the design for the bake out system; (6)the requirement for vacuum control; (7)the distribution of the vacuum pressure.

关 键 词：超高真空系统 重离子冷却储存环 加速器 

分 类 号：TL503.7[核科学技术—核技术及应用] TB753.3[一般工业技术—真空技术]