David A Smith et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 125302 doi:10.1088/0953-4075/41/12/125302
David A Smith1, Aidan S Arnold2, Matthew J Pritchard1 and Ifan G Hughes1
Show affiliationsSingle-impulse three-dimensional magnetic focusing of vertically launched cold atoms has been observed. Four different configurations of the lens were used to vary the relative radial and axial focusing properties. Compact focused clouds of 85Rb were seen for all four configurations. It is shown that an atom-optical ray matrix approach for describing the lensing action is insufficient. Numerical simulation using a full approximation to the lens's magnetic field shows very good agreement with the radial focusing properties of the lens. However, the axial (vertical direction) focusing properties are less well described and the reasons for this are discussed.
42.30.-d Imaging and optical processing
41.85.Lc Particle beam focusing and bending magnets, wiggler magnets, and quadrupoles
Issue 12 (28 June 2008)
Received 4 April 2008, in final form 9 May 2008
Published 9 June 2008
David A Smith et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 125302
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