Precision Møller polarimetry for PREX-2 and CREX

D. E. King; D. C. Jones; C. Gal; D. Gaskell; W. Henry; A. D. Kaplan; J. Napolitano; S. Park; K. D. Paschke; R. Pomatsalyuk; P. A. Souder

doi:10.1016/j.nima.2022.167506

Precision Møller polarimetry for PREX-2 and CREX

D. E. King, D. C. Jones, C. Gal, D. Gaskell, W. Henry, A. D. Kaplan, J. Napolitano, S. Park, K. D. Paschke, R. Pomatsalyuk, P. A. Souder

Department of Physics

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The PREX-2 and CREX experiments in Hall A at Jefferson Lab are precision measurements of parity violating elastic electron scattering from complex nuclei. One requirement was that the incident electron beam polarization, typically ≈90%, be known with 1% precision. We commissioned and operated a Møller polarimeter on the beam line that exceeds this requirement, achieving a precision of 0.89% for PREX-2, and 0.85% for CREX. The uncertainty is purely systematic, accumulated from several different sources, but dominated by our knowledge of the target polarization. Our analysis also demonstrates the need for accurate atomic wave functions in order to correct for the Levchuk Effect. We describe the details of the polarimeter operation and analysis, as well as (for CREX) a comparison to results from a different polarimeter based on Compton scattering.

Original language	English (US)
Article number	167506
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1045
DOIs	https://doi.org/10.1016/j.nima.2022.167506
State	Published - Jan 1 2023

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Elsevier
LaTeX
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Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2022.167506

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King, D. E., Jones, D. C., Gal, C., Gaskell, D., Henry, W., Kaplan, A. D., Napolitano, J., Park, S., Paschke, K. D., Pomatsalyuk, R., & Souder, P. A. (2023). Precision Møller polarimetry for PREX-2 and CREX. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1045, Article 167506. https://doi.org/10.1016/j.nima.2022.167506

King, DE, Jones, DC, Gal, C, Gaskell, D, Henry, W, Kaplan, AD, Napolitano, J, Park, S, Paschke, KD, Pomatsalyuk, R & Souder, PA 2023, 'Precision Møller polarimetry for PREX-2 and CREX', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1045, 167506. https://doi.org/10.1016/j.nima.2022.167506

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AU - Napolitano, J.

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Precision Møller polarimetry for PREX-2 and CREX

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