Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 67: Instrumentation XVII
HK 67.2: Talk
Thursday, March 31, 2022, 16:30–16:45, HK-H3
Status of 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. 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 our magnetic trap after double spin flip loading. UCN which are produced in pulses at the TRIGA research reactor Mainz are trapped for varying storage times and afterwards remaining neutrons are counted. The neutron lifetime can then be extracted from an exponential fit. In contrast to previous lifetime experiments employing material walls, systematic effects are reduced significantly by the magnetic confinement of UCN. The target uncertainty in the measured neutron lifetime is Δ τn=1.0 s in phase I of the experiment.
This talk will give an overview of the status of the τSPECT experiment including the magnetic field configuration, as well as the filling and measurement procedure.