An ultracold neutron storage bottle for UCN density measurements

TL;DR

This paper presents the design and construction of a robust, mobile storage bottle for ultracold neutrons, enabling precise UCN density measurements at PSI's UCN source for fundamental physics experiments.

Contribution

It introduces a novel, portable UCN storage bottle with a volume suitable for high-precision density measurements, advancing experimental capabilities.

Findings

Successfully measured UCN density at PSI beamports

Demonstrated the storage bottle's robustness and mobility

Enabled improved UCN density assessments for neutron experiments

Abstract

We have developed a storage bottle for ultracold neutrons (UCN) in order to measure the UCN density at the beamports of the Paul Scherrer Institute's (PSI) UCN source. This paper describes the design, construction and commissioning of the robust and mobile storage bottle with a volume comparable to typical storage experiments 32 liter e.g. searching for an electric dipole moment of the neutron.