Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Postersession
HK 45.30: Poster
Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24
Calibration of the precision high voltage dividers of the KATRIN experiment — •Oliver Rest for the KATRIN collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster
The KATRIN (KArlsruhe TRItium Neutrino) experiment will measure the endpoint region of the tritium β decay spectrum to determine the neutrino mass with a sensitivity of 200meV/c2. To achieve this sub-eV sensitivity the energy of the decay electrons will be analyzed using a MAC-E type spectrometer.
The retarding potential of the MAC-E-filter (up to −35kV) has to be monitored with a relative precision of 3· 10−6.
For this purpose the potential will be measured directly via two custom made precision high voltage dividers, which were developed and constructed in cooperation with the Physikalisch-Technische Bundesanstalt Braunschweig.
In order to determine the absolute values and the stability of the scale factors of the voltage dividers, regular calibration measurements are essential. Such measurements have been performed during the last years using several different methods.
The poster will give an overview of the methods and results of the calibration of the precision high voltage dividers.
This project is supported by BMBF under contract number 05A11PM2.