Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Astroteilchenphysik

HK 35.4: Vortrag

Mittwoch, 19. März 2014, 17:15–17:30, HZ 9

Main Spectrometer and Detector Commissioning Measurements by Time-of-Flight at the KATRIN experiment — •Nicholas Steinbrink, Volker Hannen, Jan Behrens und Christian Weinheimer für die KATRIN Kollaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 9, 48149 Münster

The KATRIN experiment aims to measure the electron neutrino mass with a sensitivity of < 0.2 eV at 90% confidence level. The measurement is accomplished by scanning the endpoint of the tritium beta decay spectrum with an electrostatic high pass filter, based on the MAC-E-Filter (magnetic adiabatic collimation with an electrostatic filter) principle. The filtering takes place in the main spectrometer of KATRIN while the count-rate as a function of the filter energy is measured with the focal plane detector (FPD).

The whole spectrometer and detector system (SDS) has undergone successful commissioning measurements in 2013. For that purpose, a mono-energetic angular selective electron gun has been used as calibration source. As the electron gun is driven in a pulsed mode, the time-of-flight (TOF) of electrons through the main spectrometer can be measured as well. That allows to obtain further information about the performance and functionality of the setup. In this talk results from the TOF measurements are presented. Particular emphasis will be put on the integrity of the wire electrode, which can be probed by TOF data.

This work is supported by BMBF under 05A11PM2.