摘要
离子阱是一种常用于光谱研究的装置,低温超高真空环境是其工作的基本条件。介绍了一套由真空腔体、真空抽气系统、温度监测及控制系统、脉管制冷机等组成的离子阱低温超高真空系统。在三种不同条件下对真空腔体进行抽真空对比试验,分析了影响真空系统极限真空的关键因素。采用超高真空获得方法与工艺,真空系统在常温和低温状态下分别获得了1.9×10-8Pa和5.0×10-10Pa的真空度,在高真空绝热条件下,离子阱最低温度达到3.9 K。文章最后对该系统的研制过程以及结果进行总结,提出了适用于同类低温超高真空系统设计与研制的相关结论。
Ion-trap is a device usually used in spectroscopic studies and it only works in cryogenic ultra high vacuum envi ronment. A set of cryogenic ultra high vacuum system of ion-trap is introduced in this paper. The system is composed of vac uum chamber, vacuum pumping system, temperature monitoring and control system, pulse tube refrigerator, etc. This paper analyzes the key factors which affect ultimate pressure of the vacuum system through vacuum-pumping comparative tests under three different conditions. Adopting ultra high vacuum obtaining method and technics ~ the vacuum system obtains vacuum de- gree of 1.9~10-8 Pa and 5. OxlO-~~ Pa under room temperature and cryogenic environment separately. And the minimum temperature of ion trap reaches 3.9 K under high vacuum adiabatic conditions. The development process as well as the re- sults of the system is summarized at the end of the paper and the design and development method which is applicable to simi- lar cryogenic ultra high vacuum system is proposed also.
出处
《真空与低温》
2012年第4期215-218,共4页
Vacuum and Cryogenics
关键词
超高真空
低温
脉管制冷机
离子阱
Uhra high vacuum
Cryogenic
Pulse tube refrigerator
Ion-trap
