Loading of a Rb magneto-optic trap from a getter source
Loading of a Rb magneto-optic trap from a getter source
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从吸气源加载铷磁光陷阱
DOI：
10.1103/physreva.64.023402
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发表时间：
2001
影响因子：
2.9
通讯作者：
V. Natarajan
中科院分区：
文献类型：
--
作者：
U. Rapol;A. Wasan;V. Natarajan
研究了商用吸气源加载Rb磁光阱的特性。该源为陷阱提供了大量的原子通量，并具有快速关闭的能力，这是获得长陷阱寿命所必需的。我们研究了两种不同背景压力下的陷阱载荷，确定了Rb-N2碰撞的截面为3.5(4)310214 cm2， Rb-Rb碰撞的截面为3310213 cm2。在1.331029 torr的背景压力下，我们以3.3 s的时间常数将超过108个原子装入陷阱。被困原子的1/e寿命为13秒，仅受背景碰撞的限制。
We study the properties of a Rb magneto-optic trap loaded from a commercial getter source. The source provides a large flux of atoms for the trap along with the capability of rapid turn off necessary for obtaining long trap lifetimes. We have studied the trap loading at two different values of background pressure to determine the cross section for Rb-N2 collisions to be 3.5(4)310214 cm2 and that for Rb-Rb collisions to be of order 3310213 cm2. At a background pressure of 1.331029 torr, we load more than 108 atoms into the trap with a time constant of 3.3 s. The 1/e lifetime of trapped atoms is 13 s limited only by background collisions.