A solenoidal electron spectrometer for a precision measurement of the neutron $\beta$-asymmetry with ultracold neutrons
B. Plaster, R. Carr, B.W. Filippone, D. Harrison, J. Hsiao, T.M. Ito,, J. Liu, J.W. Martin, B. Tipton, J. Yuan
TL;DR
This paper presents a specialized electron spectrometer designed for high-precision measurement of neutron beta asymmetry using ultracold neutrons, featuring a 1.0 Tesla solenoidal field and advanced detection components.
Contribution
The paper introduces a novel spectrometer design optimized for neutron beta asymmetry measurements with ultracold neutrons, including detailed performance evaluations.
Findings
Successful calibration with sources demonstrating spectrometer performance
Effective magnetic field configuration for electron detection
Potential for high-precision neutron decay measurements
Abstract
We describe an electron spectrometer designed for a precision measurement of the neutron -asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-Tesla solenoidal field with two identical multiwire proportional chamber and plastic scintillator electron detector packages situated within 0.6-Tesla field-expansion regions. Select results from performance studies of the spectrometer with calibration sources are reported.
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