Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 55: Neutrinophysik VII
T 55.7: Vortrag
Mittwoch, 21. März 2018, 18:00–18:15, Z6 - HS 0.001
High voltage monitoring and calibration at the KATRIN experiment — •Caroline Rodenbeck and KATRIN Collaboration for the KATRIN collaboration — Karlsruhe Institute of Technology (KIT), ETP, Postfach 3640, 76021 Karlsruhe; Institut für Kernphysik, Westfälische Wilhelms-Universität Münster
The Karlsruhe Tritium Neutrino experiment (KATRIN) aims to measure the rest mass of the electron-antineutrinos with a sensitivity of 0.2 eV/c2 (90% C.L.). For this the tritium beta spectrum is measured in the endpoint region with an integrating spectrometer using the MAC-E-filter principle. To reach this high sensitivity the voltage which is used to create the electrostatic energy barrier for the beta electrons, needs to be precisely set and known. The KATRIN high voltage system meets these requirements with high precision power supplies and high precision monitoring using purpose-built high voltage dividers.
For reliable high voltage monitoring, calibrations need to be performed on a regular basis. The reliability of the high voltage monitoring system has been thoroughly tested and verified in the last years e.g. during commissioning measurements with conversion electrons of Krypton-83m. This talk will present the performance of the high voltage system over the last years and especially with regard to the requirements needed for the neutrino mass measurements.
This work was supported by BMBF (05A17VK2) and the HGF.