Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 39: Astroparticle Physics
HK 39.3: Talk
Tuesday, March 17, 2009, 17:15–17:30, H-ZO 70
A photelectron-gun for the investigation of MAC-E filters — •Marcus Beck1, Kathrin Valerius1, Christian Weinheimer1, Sebastian Streubel1, Henrik Arlinghaus1, Hendrik Hein1, Hans-Werner Ortjohann1, Helmut Baumeister1, Miroslav Zboril1, Beatrix Ostrick1,2, and Jochen Bonn2 — 1Institut für Kernphysik, WWU Münster, Wilhelm-Klemm Str. 9, 48149 Münster — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz
The KATRIN experiment will measure the energy spectrum of electrons from the beta decay of Tritium close to its endpoint to search for the mass of the electron neutrino down to 0.2eV/c2. For the energy analysis a MAC-E type filter is used. In order to investigate transmission and response of this filter we developed a pulsed, monoenergetic single electron source based on photoelectrons created with modern UV-LEDs. The emission of these electrons can be restricted to small angle intervals. This electron gun opens up the possibility to investigate the properties of MAC-E filters via time-of-flight studies and for defined emission angles.
We will present the experimental principle and results of measurements at the MAC-E filter at the former Mainz neutrino mass experiment, including a time-of-flight measurement of the transmission function.
This project is supported by BMBF under contract number 05A08PM1.