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Výbor pro spolupráci ČR se Spojeným ústavem jaderných výzkumů Přihlášení
Calibration of high voltages at the ppm level by the difference of Kr-83m conversion electron lines at the KATRIN experiment

Autor
Arenz M. University of Bonn, Germany
Kovalík Alojz, Ing. DrSc. Ústav jaderné fyziky AV ČR, SÚJV Dubna
Dragoun Otokar, Ing. DrSc.  Ústav jaderné fyziky AV ČR
Ryšavý  Miloš, RNDr. CSc.  Ústav jaderné fyziky AV ČR
Sentkerestiová  Jana , Ing. Ph.D. Ústav jaderné fyziky AV ČR
Suchopár Martin, Ing. Ph.D. Ústav jaderné fyziky AV ČR
Vénos Drahoslav, Mgr. CSc. Ústav jaderné fyziky AV ČR
et al.  Katrin collaboration

Rok
2018

Časopis
European Physical Journal C, 78 (5), 368

Web


Obsah
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.

Příklad citace článku:
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)