Simple, reliable, and nondestructive method for the measurement of vacuum pressure without specialized equipment

被引：21
|
作者：
Yuan, Jin-Peng [1 ]
Ji, Zhong-Hua [1 ]
Zhao, Yan-Ting [1 ]
Chang, Xue-Fang [1 ]
Xiao, Lian-Tuan [1 ]
Jia, Suo-Tang [1 ]
机构：
[1] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China
来源：
APPLIED OPTICS | 2013年 / 52卷 / 25期
基金：
对外科技合作项目（国际科技项目）; 中国国家自然科学基金;
关键词：
COLLISIONAL LOSS RATE; SODIUM ATOMS; MAGNETOOPTICAL TRAP; COLD;
D O I：
10.1364/AO.52.006195
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a simple, reliable, and nondestructive method for the measurement of vacuum pressure in a magneto-optical trap. The vacuum pressure is verified to be proportional to the collision rate constant between cold atoms and the background gas with a coefficient k, which can be calculated by means of the simple ideal gas law. The rate constant for loss due to collisions with all background gases can be derived from the total collision loss rate by a series of loading curves of cold atoms under different trapping laser intensities. The presented method is also applicable for other cold atomic systems and meets the miniaturization requirement of commercial applications. (C) 2013 Optical Society of America
引用
收藏
页码：6195 / 6200
页数：6
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