Department of Physics and Astronomy: Publications and Other Research


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Machacek, J.R.; Hodgman, S.; Buckman, S.; Gay, T.J. A Method to Measure Positron Beam Polarization Using Optically Polarized Atoms. Atoms 2023, 11, 65. 10.3390/atoms11040065


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We outline an experimental technique for measuring the degree of polarization of a positron beam using an optically pumped, spin-polarized Rb target. The technique is based on the production and measurement of the ortho- and para-positronium fractions through positron collisions with the Rb atoms as a function of their polarization. Using realistic estimates for the cross sections and experimental parameters involved, we estimate that a polarization measurement with an uncertainty of 3% of the measured value can be achieved in an hour

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