Double-impulse magnetic focusing of launched cold atoms
arXiv:physics/0512151 · doi:10.1088/1367-2630/8/4/053
Abstract
We have theoretically investigated 3D focusing of a launched cloud of cold atoms using a pair of magnetic lens pulses (the alternate-gradient method). Individual lenses focus radially and defocus axially or vice-versa. The performance of the two possible pulse sequences are compared and found to be ideal for loading both 'pancake' and 'sausage' shaped magnetic/optical microtraps. It is shown that focusing aberrations are considerably smaller for double-impulse magnetic lenses compared to single-impulse magnetic lenses. An analysis of the clouds focused by double-impulse technique is presented.
arXiv comment14 pages, 6 figures. Accepted for publication in New Journal of Physics
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