Characterizing the AFP Spin Flipper for the Nab Experiment
R. Godri*,
R. Alarcon,
S. Baeßler,
L.J. Broussard,
S. Clymer,
C.B. Crawford,
G.W. Dodson, J. Fry, N. Fomin, F.M. Gonzalez, J. Hamblen, C. Hendrus, C. Jiang, C. Landgraf, A. Nelsen, N. Macsai, R. Mammei, P.E. Mueller, J.H. Pate, S. Penttilä, J. Pierce, D. Počanić, H. Rahangdale, J.C. Ramsey, L. Richburg, A. Saunders and I. Wallaceet al. (click to show)*: corresponding author
Pre-published on:
May 27, 2025
Published on:
—
Abstract
The Nab experiment at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) aims to yield a precise measurement of the electron-neutrino correlation parameter, $a$, to $\frac{\Delta a}{a}=1\times10^{-3}$ from the beta-decay of the free neutron. To achieve Nab’s precision goal, polarization of the neutron beam must be near-zero. A polarizer/analyzer combination, neutron monitors, and an Adiabatic Fast Passage (AFP) spin flipper will be used to determine a beam polarization effectively less than $2\times10^{-5}$. Here, I will discuss the initial characterization efforts of the Nab spin flipper as well as plans for further testing.
*This work has been supported by DOE Award Number: DE-FG02-03ER41258
DOI: https://doi.org/10.22323/1.472.0067
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