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Experiments with strontium in a vapor cell magneto-optic trap

机译:蒸气池磁光阱中锶的实验

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Abstract: In a ceramic vapor cell we have created a robust Sr magneto- optical trap that stores about 10$+8$/ atoms with lifetimes $GRT 200 ms. We eliminate the 5p $+1$/P$-1$/ $YLD 4d$+1$/D$- 2$/ $YLD 5p $+3$/P$-2$/ leak and achieve a 10-fold improvement in trap lifetime by re-pumping the 5p $+3$/P$- 0,2$/ dark states with 679 nm and 707 nm light. The observed lifetime is now limited by cold collision losses, and we have preliminary measurements of the 2-body loss rate. Direct readout of the trap velocity distribution is possible using the narrow 5s$+2$/ $+1$/S$-0$/ $YLD 5p $+3$/P$-1$/ intercombination line at 689 nm. We can also cool with this narrow transition and have achieved a 40-fold 1D velocity compression for about 5 percent of the trapped atoms by applying this second-stage cooling. !17
机译:摘要:在陶瓷蒸气电池中,我们创建了一个坚固的Sr磁光阱,该阱存储约10 $ + 8 $ /个原子,寿命$ GRT 200毫秒。我们消除了5p $ + 1 $ / P $ -1 $ / $ YLD 4d $ + 1 $ / D $-2 $ / $ YLD 5p $ + 3 $ / P $ -2 $ /的泄漏量并达到10倍通过用679 nm和707 nm的光重新泵浦5p $ + 3 $ / P $-0,2 $ /暗态来改善陷阱寿命。现在,观察到的寿命受到冷碰撞损失的限制,我们对2体损失率进行了初步测量。使用狭窄的5s $ + 2 $ / $ + 1 $ / S $ -0 $ / $ YLD 5p $ + 3 $ / P $ -1 $ / 689nm处的复合线可以直接读取阱速度分布。我们还可以通过这种狭窄的过渡进行冷却,并且通过应用此第二阶段冷却,可以对大约5%的捕获原子实现40倍的1D速度压缩。 !17

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