Physics of fundamental Symmetries and Interactions - PSI2025

Monte Carlo simulation framework for the neutron lifetime experiment τSPECT

9 Sept 2025, 17:10

1m

Outside Auditorium and Tent

Poster presentation Poster Session and BBQ

Speaker

Niklas Pfeifer (Johannes Gutenberg University Mainz)

Description

The $\tau$SPECT experiment aims to measure the free neutron lifetime
with an uncertainty goal of sub-second by storing ultra-cold neutrons (UCNs)
in a fully magnetic bottle using a spin-flip loading technique. Monte Carlo (MC) simulations of neutron dynamics in the experiment are a key element to study and understand systematic effects, reduce uncertainties, and improve the experimental design. Based on pre-existing MC UCN software packages, we significantly enhanced their capabilities and set up a comprehensive simulation framework for our experiment. We accurately simulate the production, transport, storage, and detection of UCNs in $\tau$SPECT.

This poster presents the simulation framework as well as the latest simulation results.