Cold ion–neutral collisions in a hybrid trap
Cold ion–neutral collisions in a hybrid trap
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混合陷阱中的冷离子-中性碰撞
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Jian Lin
中科院分区：
文献类型：
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作者：
W. Smith;O. P. Makarov;Jian Lin
建立了一个双混合离子-中性阱，用于研究超冷原子云与少量共阱原子或分子离子在一个共同体积中的碰撞。利用单模稳频环形染料激光器，在再泵浦条件下，将超冷钠原子囚禁在汽室磁光阱中。线性rf四极Paul离子阱，以MOT为中心，共同捕获选定的原子或分子离子，例如Ca+。初始离子温度的控制涉及通过397 nm处的共振夫琅和费K线激光冷却Ca+离子。结果表明，射频离子阱可以在不破坏超冷原子云的情况下与MOT同时工作。目标是研究离子中性交感冷却的物理学，通过中性分子离子（例如Na 2+（v*，J*））的冷却，以及在0 K附近观察其他离子中性过程，在天体物理学中具有潜在的兴趣。
A dual hybrid ion–neutral trap has been built to study collisions between a cloud of ultracold atoms and small numbers of co-trapped atomic or molecular ions, in a common volume. Ultracold Na atoms are trapped in a vapour-cell magneto-optical trap (MOT), via a single-mode frequency-stabilized ring-dye laser, with repumping. A linear rf quadrupole Paul ion trap, centred on the MOT, co-traps selected atomic or molecular ions, for example Ca+. Control of the initial ion temperature involves laser cooling Ca+ ions via the resonant Fraunhofer K line at 397 nm. We showed the rf ion trap can operate simultaneously with the MOT without destroying the ultracold atom cloud. The goal is to investigate the physics of ion–neutral sympathetic cooling, the cooling by neutrals of translationally cold and vibrorotationally hot molecular ions (e.g. Na2 +(v*, J*)), and the observation of other ion–neutral processes near 0 K, of potential interest in astrophysics.