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HK: Fachverband Physik der Hadronen und Kerne
HK 51: Instrumentation XIII
HK 51.2: Vortrag
Mittwoch, 13. März 2024, 17:45–18:00, HBR 19: C 2
Simulations of adiabatic fast passage spin flippers for the neutron lifetime experiment τSPECT — •Niklas Pfeifer1, Martin Fertl1, and Dieter Ries2 for the tauSPECT collaboration — 1Institute of Physics, Johannes Gutenberg University Mainz, Mainz, Germany — 2Paul Scherrer Institute, Villigen PSI, Switzerland
The τSPECT experiment aims to measure the free neutron lifetime with an uncertainity goal of sub second by storing ultra-cold neutrons in a fully magnetic bottle. A key element of the experiment is the adiabatic fast passage spin flipper. It is used to convert the neutrons into the storable, low-field-seeking spin state by applying a radiofrequency field in a magnetic field gradient region. To study and understand systematic effects and reduce uncertainties of the current design, simulations of neutron dynamics during the spin flip process are needed. Based on the PENTrack software we developed a simulation framework to accurately simulate the trajectories as well as the spin dynamics of ultra-cold neutrons in complex electromagnetic fields.
This talk will present the underlying theory, latest results and challenges of neutrons spin-flipping simulations for τSPECT as well as possible future optimizations and performance improvements.