Bochum 2018 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentation IX
HK 27.1: Group Report
Tuesday, February 27, 2018, 16:30–17:00, Audimax H1
Status of the KATRIN experiment and preparation for tritium measurements — •Jan David Behrens — Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen
The KArlsruhe TRItium Neutrino experiment aims to determine the mass of the electron antineutrino with a sensitivity of 0.2 eV/c2 (90% C.L.). The measurement of the shape of the tritium β-spectrum facilitates a model-independent investigation of the absolute neutrino mass scale. The setup consists of a 70 m long beam line that magnetically guides electrons from a gaseous, windowless tritium source to a silicon detector. The energy analysis of the electrons takes place in an electrostatic spectrometer (MAC-E filter) with an energy resolution of about 1 eV. In preparation for tritium data-taking, a measurement campaign was carried out with gaseous and condensed 83mKr sources in the main beam line. Due to its narrow conversion electron lines this krypton isotope is ideally suited to investigate the performance of the MAC-E filter and overall system stability. These measurements allow us to investigate the experiment’s reponse function, the beam line alignment and simulation models which are vital analysis ingredients.
The talk gives an overview about the current status of the experiment, focusing on the results of the recent data-taking period with gaseous and condensed krypton sources. This project is supported by BMBF project 05A17VK2, the Helmholtz Society and the Young Investigators Group (YIG) VH-NG-1055.