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Committee for collaboration of Czech Republic

with Joint Institute for Nuclear Research in Dubna Login
Calibration of high voltages at the ppm level by the difference of Kr-83m conversion electron lines at the KATRIN experiment

Author
Arenz M. University of Bonn, Germany
Kovalík Alojz, Ing. DrSc. Nuclear Physics Institute of the ASCR, JINR Dubna
Dragoun Otokar, Ing. DrSc.  Nuclear Physics Institute of the ASCR
Ryšavý  Miloš, RNDr. CSc.  Nuclear Physics Institute of the ASCR
Sentkerestiová  Jana , Ing. Ph.D. Nuclear Physics Institute of the ASCR
Suchopár Martin, Ing. Ph.D. Institute of Physics ASCR
Vénos Drahoslav, Mgr. CSc. Nuclear Physics Institute of the ASCR
et al.  Katrin collaboration

Year
2018

Scientific journal
European Physical Journal C, 78 (5), 368

Web


Abstract
The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at - 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage dividers were developed and built in cooperation with the German national metrology institute Physikalisch-Technische Bundesanstalt (PTB). Until now, regular absolute calibration of the voltage dividers required bringing the equipment to the specialised metrology laboratory. Here we present a new method based on measuring the energy difference of two Kr-83m conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN's commissioning measurements in July 2017. The measured scale factor M = 1972.449(10) of the high-voltage divider K35 is in agreement with the last PTB calibration 4 years ago. This result demonstrates the utility of the calibration method, as well as the long-term stability of the voltage divider.

Cite article as:
M. Arenz, A. Kovalík, O. Dragoun, M. Ryšavý , J. Sentkerestiová , M. Suchopár, D. Vénos, . et al., "Calibration of high voltages at the ppm level by the difference of Kr-83m conversion electron lines at the KATRIN experiment", European Physical Journal C, 78 (5), 368 (2018)