Münster 2017 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 34: Instrumentation VIII and Accelerators
HK 34.6: Talk
Wednesday, March 29, 2017, 18:15–18:30, F 073
Absolute calibration of reference dividers for the KATRIN experiment — •Patrik Herud for the KATRIN collaboration — Institut für Kernphysik, Westfälische-Wilhelms-Universität, Münster
The goal of the KATRIN (KArlsruhe TRItium Neutrino) experiment is to search for the neutrino mass with a sensitivity of 200 meV/c2
by measuring the endpoint region of the tritium β-decay spectrum.
This sub-eV sensitivity is achieved by using a MAC-E-filter as the electron spectrometer. The precision of the retarding potential of the MAC-E-filter (up to −35 kV) has to be monitored with an uncertainty of 60 mV at the endpoint region (18.6 keV).
To measure the retarding potential we had build custom-made high precision voltage dividers in coorperation with the Physikalisch-Technische Bundesanstalt Braunschweig. To ensure the required stability, regular high precision calibrations are needed. For the complicated calibrations an absolute calibration of voltages up to 1 kV by commercially available voltage dividers (FLUKE 752A) is required.
In this talk we will present a new absolute calibration method for these 1 kV dviders and show first calibration tests.