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The neutron decay retardation spectrometer aSPECT: Electromagnetic design and systematic effects
journal contribution
posted on 2023-06-08, 00:28 authored by F Glück, S Baeßler, J Byrne, Maurits G D Van Der Grinten, F J Hartmann, W Heil, I Konorov, G Petzoldt, Yu Sobolev, O ZimmerThe apparatus described here, aSPECT, will be used for a measurement of the neutrino-electron angular correlation coefficient a in the decay of free neutrons. The idea of the aSPECT spectrometer is to measure the integrated proton energy spectrum very accurately using an energy filter by electrostatic retardation and magnetic adiabatic collimation. The main ideas of the spectrometer are presented, followed by an explanation of the adiabatic transmission function. Details of the superconducting coil and of the electrode system are given, as well as a discussion of the most important systematic effects: magnetic field and electrostatic potential inhomogeneities, deviation from adiabatic motion, scattering in the residual gas, background, Doppler effect, edge effect, and detector efficiency. Using this spectrometer, the parameter a is planned to be measured with an absolute experimental uncertainty of da ˜ 3 . 10-4, from which the axial vector to vector coupling constant ratio ? can be determined with an accuracy of d? ˜ 0.001.
History
Publication status
- Published
Journal
The European Physical Journal A: Hadrons and NucleiISSN
1434-6001Publisher
Springer VerlagExternal DOI
Issue
1Volume
23Page range
135 - 146Pages
11.0Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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