SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Instrumentation V
HK 13.5: Vortrag
Dienstag, 31. August 2021, 17:45–18:00, H2
The filling process in the neutron lifetime experiment τSPECT — •Kim Ulrike Ross for the tauSPECT collaboration — Department of Chemistry, Johannes Gutenberg University, Mainz
The τSPECT experiment aims to measure the neutron lifetime τn using a 3D magnetic storage technique with spin flip loading. Due to the neutron’s magnetic moment, very low-energetic neutrons (ultracold neutrons, UCN) with a maximum energy of ≈ 50 neV can be stored in the magnetic trap with a volume of ≈ 10 L. Counting surviving UCN after varying storage times, the neutron lifetime can be extracted from an exponential fit. The target uncertainty in the neutron lifetime is Δ τn=1.0 s in phase I of the experiment.
The overall measurement duration to achieve this goal is currently limited by UCN statistics, so an optimised filling process is crucial. Two filling techniques have been investigated so far, which are using either one or two adiabatic fast passage spin flippers.
This talk will give a short introduction into spin flipping UCN in τSPECT as well as the current status of the filling optimisation process.