Speaker
Description
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 ∆a/a ≈ 3 × 10$^{−4}$ from the beta-decay of the free neutron. To achieve Nab’s precision goal, it is required that there is near-zero polarization of the neutron beam. To measure any residual polarization, 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 2×10$^{−5}$. Here, I will discuss the initial characterization efforts of the Nab spin flipper as well as the plans for further testing and its ultimate role once installed on the Fundamental neutron Physics Beamline (FnPB).
*This work has been supported by DOE Award Number: DE-FG02-03ER41258
