Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 63: Astroteilchenphysik

HK 63.1: Vortrag

Freitag, 23. März 2012, 14:00–14:15, RW 3

PERC, a clean, bright and versatile source of neutron decay products — •Bastian Märkisch — Physikalisches Institut, Universität Heidelberg

Within the Standard Model of particle physics, neutron β-decay is described by only three parameters, whereas there are many more observables accessible to experiments. Precision measurements on neutron decay observables make it therefore an ideal candidate in the search for physics beyond the SM.

We present the new facility PERC (Proton Electron Radiation Channel), a novel source of neutron decay products. PERC will be installed at the Forschungs-Neutronenquelle Heinz Maier-Leibnitz. Decay rate is largely increased compared to existing instruments like e.g. Perkeo III by using the inside of an 8 m long neutron guide as active decay volume. Electrons and protons are extracted from this volume and separated from the neutron beam by a strong magnetic field. A magnetic filter of up to 6 T serves to precisely define the phase space of the emerging decay particles. Spectra and angular distributions will be distortion-free on the level of 10^-4. We give an overview on the concept of the PERC instrument, observables accessible and its present status.