Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 70: Instrumentation XX
HK 70.1: Gruppenbericht
Freitag, 18. März 2016, 14:00–14:30, S1/01 A3
The neutron lifetime experiment PENeLOPE — •Wolfgang Schreyer1, Dominic Gaisbauer1, Joachim Hartmann1, Igor Konorov1, Stephan Paul1, Rüdiger Picker2, Dominik Steffen3, Rainer Stoepler1, and Christian Tietze1 — 1Technische Universität München, Garching, Germany — 2TRIUMF, Vancouver, Canada — 3CERN, Geneva, Switzerland
The neutron lifetime τn = 880.3 ± 1.1 s is an important parameter in the Standard Model of particle physics and in Big Bang cosmology. Several systematic corrections of previously published results reduced the PDG world average by several σ in the last years and call for a new experiment with complementary systematics.
The experiment PENeLOPE, currently under construction at the Physik-Department of Technische Universität München, aims to determine the neutron lifetime with a precision of 0.1 s. It will trap ultra-cold neutrons in a magneto-gravitational trap using a large superconducting magnet and will measure their lifetime by both neutron counting and online proton detection.
This presentation will give an overview over the latest developments of the experiment, especially magnet construction, the ultra-cold neutron polarization system, and the proton detector.
The project is supported by the Maier-Leibnitz-Laboratorium (Garching), the Deutsche Forschungsgemeinschaft, and the Excellence Cluster "Origin and Structure of the Universe".