Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 63: Astroteilchenphysik
HK 63.2: Talk
Friday, March 23, 2012, 14:15–14:30, RW 3
Superconducting magnet system for PERC — •Carmen Drescher — Physikalisches Institut, Universität Heidelberg
The new PERC (Proton Electron Radiation Channel) instrument will be an extremely bright and versatile source of neutron decay products. It will feed several novel precision experiments of spectra and correlation measurements in neutron decay. Its main component is a more than 11 m long superconducting magnet system. The neutron decay volume is located inside an 8 m long neutron guide in a strong longitudinal magnetic field of 1.5T. A variable magnetic barrier of 3T to 6T serves to precisely limit the phase space of the emerging electrons and protons to control systematic errors on the 10−4level. The instrument is currently under development and will be installed at the neutron-beamline Mephisto at the FRM II, Garching. In this talk we give an overview on the special characteristics and advantages of PERC‘s field design. We will show that with our design we can prevent magnetic traps in magnetic field and achieve a clean separation of neutrons and decay-products.