Collision kernels from velocity-selective optical pumping with magnetic depolarization
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Bhamre-2013-Collision kernels from.pdf
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Author(s)
Bhamre, T.
Kominis, I. K.
McGuyer, B. H.
Happer, W.
Marsland, Robert Alvin
Date Issued
April 2013
Journal
Physical Review A
Publisher
American Physical Society
Citation
Bhamre, T., R. Marsland, I. Kominis, B. McGuyer, and W. Happer. "Collision kernels from velocity-selective optical pumping with magnetic depolarization." Phys. Rev. A 87, 043412 (April 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We experimentally demonstrate how magnetic depolarization of velocity-selective optical pumping can be used to single out the collisional cusp kernel best describing spin- and velocity-relaxing collisions between potassium atoms and low-pressure helium. The range of pressures and transverse fields used simulate the optical pumping regime pertinent to sodium guidestars employed in adaptive optics. We measure the precession of spin-velocity modes under the application of transverse magnetic fields, simulating the natural configuration of mesospheric sodium optical pumping in the geomagnetic field. We also provide a full theoretical account of the experimental data using the recently developed cusp kernels, which realistically quantify velocity damping collisions in this optical pumping regime. A single cusp kernel with a sharpness s = 13 ± 2 provides a global fit to the K-He data.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.87.043412
