【摘要】 介绍一种磁光阱用超高真空系统。该系统全部采用国产材料和设备，其极限真空度可以达到＜6×1018Pa（或＜5×10－10托）。用此系统已经观测到冷原子云实验现象，证明系统可靠实用，同时也为进一步的原子喷泉实验做好了准备。更多还原

【Abstract】 An ultra high vacuum system which is fully made of homemade material and deviceswas developed and applied to the magnetic optical trap experiment in March, 1996. Usingthis vacuum system, ultra cold cesium atoms were found and trapped in China for the firsttime in a magnetic optical trap at the ultimate vacuum below 6×10-8Pa (or below 5×10-10Torr). The system proves very useful and reliable. In addition, the system creates afavorable condition for the experiments of atom fountain. Beijing Research and Development Center of Scientific Instruments, Chinese Academyof Sciences (KYKY) is one of the major bases for cacuum production in China. Our system consists of KYKY’s sputter ion pumps, turbomolecular pumps and sorption pumps.KYKY’s ion pumps are of good quality, performance and reliability, FB- 110A turbomolecular pumps can fast start up and have the advantages of low vibration, noiselessnessand long service life. It is important that the pump can be installed either vertically or horizontally and run at a high speed. XB-1 sorption pumps can be used as forepumps of oilless system. Efficiently pumping has been achieved through the molecular sieves which canabsorb gas molecules in large amounts at LN2 temperature.更多还原