Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumps.

Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumps.
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DOI:
10.1038/s41598-020-73605-z
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发表时间:
2020-10-06
期刊:
影响因子:
4.6
通讯作者:
Kitching J
Kitching J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Boudot R;McGilligan JP;Moore KR;Maurice V;Martinez GD;Hansen A;de Clercq E;Kitching J

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我们表明,微加工的非蒸散型吸气剂泵(NEGs)可以延长的时间,激光冷却的原子可以产生在磁光阱(MOT),在没有其他真空抽气机制。在第一项研究中,我们将一个硅玻璃微加工超高真空(UHV)细胞与硅蚀刻NEG腔和铝硅酸盐玻璃(ASG)窗口,并证明了一个重复加载MOT超过10分钟的时间内观察到一个单一的激光激活NEG。在第二项研究中,在含有五个NEG片的硼硅酸盐玻璃吹制比色皿中进一步研究了激光激活NEG材料的被动泵浦能力。在该细胞中,在没有任何外部主动泵送系统的情况下,MOT保持可见超过4天。这个MOT观测时间超过了在无NEG情况下获得的观测时间几乎五个数量级。电池的可扩展性和潜在的真空寿命可能与NEG材料在未来的小型化冷原子仪器的发展。
We show that micro-machined non-evaporable getter pumps (NEGs) can extend the time over which laser cooled atoms can be produced in a magneto-optical trap (MOT), in the absence of other vacuum pumping mechanisms. In a first study, we incorporate a silicon-glass microfabricated ultra-high vacuum (UHV) cell with silicon etched NEG cavities and alumino–silicate glass (ASG) windows and demonstrate the observation of a repeatedly-loading MOT over a 10 min period with a single laser-activated NEG. In a second study, the capacity of passive pumping with laser activated NEG materials is further investigated in a borosilicate glass-blown cuvette cell containing five NEG tablets. In this cell, the MOT remained visible for over 4 days without any external active pumping system. This MOT observation time exceeds the one obtained in the no-NEG scenario by almost five orders of magnitude. The cell scalability and potential vacuum longevity made possible with NEG materials may enable in the future the development of miniaturized cold-atom instruments.
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