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arXiv quant-ph/0011113quant-ph
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磁阱的连续加载

Continuous loading of a magnetic trap

J. Stuhler, P. O. Schmidt, S. Hensler, J. Werner, J. Mlynek, T. Pfau

摘要:

我们实现了一种磁阱连续加载的方案。^{52}Cr原子在磁光阱(MOT)中被连续捕获和冷却。光抽运到一个亚稳态使原子从冷却的光中分离出来。由于它们的高磁矩(6玻尔磁子),低场寻求亚稳原子被困在由MOT提供的磁四极场。受MOT和MT中原子之间的非弹性碰撞的限制,我们以10^8原子/秒的速率将10^8个亚稳态原子加载到MT中,低于100微开尔文。加载后,我们可以进行光再泵浦,实现基态铬原子的MT。

英文摘要:

We have realized a scheme for continuous loading of a magnetic trap (MT). ^{52}Cr atoms are continuously captured and cooled in a magneto-optical trap (MOT). Optical pumping to a metastable state decouples atoms from the cooling light. Due to their high magnetic moment (6 Bohr magnetons), low-field seeking metastable atoms are trapped in the magnetic quadrupole field provided by the MOT. Limited by inelastic collisions between atoms in the MOT and in the MT, we load 10^8 metastable atoms at a rate of 10^8 atoms/s below 100 microkelvin into the MT. After loading we can perform optical repumping to realize a MT of ground state chromium atoms.

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