A Method to Measure Positron Beam Polarization Using Optically Polarized Atoms

Authors

• Joshua Joshua Machacek, Australian National University
• Sean Hodgman, Australian National University
• Stephen Buckman, Australian National University, UCSI University
• T. J. Gay, University of Nebraska - LincolnFollow

Document Type

Article

Date of this Version

4-3-2023

Citation

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. https://doi.org/ 10.3390/atoms11040065

Comments

Open access.

Abstract

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