Ultracold neutron storage and transport at the PSI UCN source

Abstract

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 ~16 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.

31 pages, 18 figures, submitted to Eur. Phys. J. A

References in corpus (5)

• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• Measurement of the permanent electric dipole moment of the neutron
• The design of the n2EDM experiment
• The PanEDM Neutron Electric Dipole Moment Experiment at the ILL
• Optimizing neutron moderators for a spallation-driven ultracold-neutron source at TRIUMF

Cited by in corpus (6)

• The design of the n2EDM experiment
• Time-of-flight spectroscopy of ultracold neutrons at the PSI UCN source
• A diffuse scattering model of ultracold neutrons on wavy surfaces
• Characterization of ultracold neutron production in thin solid deuterium films at the PSI Ultracold Neutron source
• Simulation and optimization of the Active Magnetic Shield of the n2EDM experiment
• Ultra-cold neutron simulation framework for the free neutron lifetime experiment $\tau$SPECT