Single-impulse magnetic focusing of launched cold atoms

Details Single-impulse magnetic focusing of launched cold atoms Single-impulse magnetic focusing of launched cold atoms

2005-12-15

arxiv.org/abs/physics/0512141v1

J. Phys. B, 37 4435 (2004)

Physics

Atomic Physics

16 pages, 7 figures

Scientific paper

10.1088/0953-4075/37/22/004

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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