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Publication Citation: Atom numbers in magneto-optic traps with millimeter scale laser beams

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Author(s): Gregory W. Hoth; Elizabeth A. Donley; John E. Kitching;
Title: Atom numbers in magneto-optic traps with millimeter scale laser beams
Published: February 22, 2013
Abstract: We measure the number of atoms, N, that can be trapped in a conventional vapor cell MOT using beams that have a diameter d in the range 1-5 mm. We show that the N \propto d3.6 scaling law observed for larger MOTs is a robust approximation for optimized MOTs with beam diameters as small as $d\approx2$~mm. For smaller beams, the description of the scaling depends on how $d$ is defined. We suggest that to accurately describe the capture volume at high intensities, $d$ should be defined as the diameter where the intensity falls to $I=Isat . Using this definition, we find that $N$ scales as d6 for d<2.3~mm.
Citation: Optics Letters
Volume: 38
Issue: 5
Pages: pp. 661 - 663
Keywords: laser cooling and trapping;magneto-optical trap (MOT)
Research Areas: Physics