发射冷原子的单脉冲磁聚焦
Single-impulse magnetic focusing of launched cold atoms
摘要：
我们从理论上研究了发射的冷原子云的聚焦。随时间变化的空间变化的磁场被用来施加脉冲，导致发射的云的三维焦点。我们讨论了一种新的聚焦机制可能的线圈安排：原子与单脉冲磁透镜的各向同性3D聚焦。我们研究聚焦像差，并发现，对于典型的实验参数，广泛使用的纯谐波透镜的假设往往是不准确的。棒球透镜提供了在3D中各向同性聚焦一团寻找弱场的原子的最佳可能性。
英文摘要：
We have theoretically investigated the focusing of a launched cloud of cold atoms. Time-dependent spatially-varying magnetic fields are used to impart impulses leading to a three-dimensional focus of the launched cloud. We discuss possible coil arrangements for a new focusing regime: isotropic 3D focusing of atoms with a single-impulse magnetic lens. We investigate focusing aberrations and find that, for typical experimental parameters, the widely used assumption of a purely harmonic lens is often inaccurate. The baseball lens offers the best possibility for isotropically focusing a cloud of weak-field-seeking atoms in 3D.
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