https://doi.org/10.1140/epja/s10050-022-00747-1
Regular Article - Experimental Physics
Ultracold neutron storage and transport at the PSI UCN source
1
Laboratory for Particle Physics, Paul Scherrer Institute, 5232, Villigen-PSI, Switzerland
2
Institute for Particle Physics, ETH Zürich, Zurich, Switzerland
3
Department of Chemistry-TRIGA Site, Johannes Gutenberg University Mainz, 55128, Mainz, Germany
d
bernhard.lauss@psi.ch
g
geza.zsigmond@psi.ch
Received:
25
October
2021
Accepted:
9
May
2022
Published online:
6
June
2022
Efficient neutron transport is a key ingredient to the performance of ultracold neutron (UCN) sources, important to meeting the challenges placed by high precision fundamental physics experiments. At the Paul Scherrer Institute’s UCN source we have been continuously improving our understanding of the UCN source parameters by performing a series of studies to characterize neutron production and moderation, and UCN production, extraction, and transport efficiency to the beamport. The present study on the absolute UCN transport efficiency completes our previous publications. We report on complementary measurements, namely one on the height-dependent UCN density and a second on the transmission of a calibrated quantity of UCN over a 
m long UCN guide section connecting one beamport via the source storage vessel to another beamport. These allow us quantifying and optimizing the performance of the guide system based on extensive Monte Carlo simulations.
© The Author(s) 2022
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