Neutron optics of the PSI ultracold neutron source: characterization and simulation

Abstract

The ultracold neutron (UCN) source at the Paul Scherrer Institute serves mainly experiments in fundamental physics. High UCN intensities are the key for progress and success in such experiments. A detailed understanding of all source parameters is required for future improvements. Here we present the UCN source components, elements of the neutron optics, the characterization of important related parameters like emptying times, storage times or transmission probabilities of UCN which are ultimately defining the UCN intensity delivered at the beamports. We also introduce a detailed simulation model of the PSI UCN source, used to analyze the measurements and to extract surface parameters.

References in corpus (16)

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• A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
• Improved Determination of the Neutron Lifetime
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• Comparison of ultracold neutron sources for fundamental physics measurements
• The n2EDM experiment at the Paul Scherrer Institute
• Startup of the High-Intensity Ultracold Neutron Source at the Paul Scherrer Institute
• Solid deuterium surface degradation at ultracold neutron sources
• The MCUCN simulation code for ultracold neutron physics
• Neutron production and thermal moderation at the PSI UCN source
• Upgrade of the ultracold neutron source at the pulsed reactor TRIGA Mainz
• A prestorage method to measure neutron transmission of ultracold neutron guides
• nEDM experiment at PSI: data-taking strategy and sensitivity of the dataset

Cited by in corpus (14)

• Measurement of the permanent electric dipole moment of the neutron
• The design of the n2EDM experiment
• A search for neutron to mirror-neutron oscillations
• The `n2EDM MSR' -- a very large magnetically shielded room with an exceptional performance for fundamental physics measurements
• Ultracold neutron storage and transport at the PSI UCN source
• Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
• Characterization of electroless nickel-phosphorus plating for ultracold-neutron storage
• Time-of-flight spectroscopy of ultracold neutrons at the PSI UCN source
• Search for an interaction mediated by axion-like particles with ultracold neutrons at the PSI
• Johnson-Nyquist Noise Effects in Neutron Electric-Dipole-Moment Experiments
• Data blinding for the nEDM experiment at PSI
• 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
• Fundamental Neutron Physics: a White Paper on Progress and Prospects in the US