Calibration of high voltages at the ppm level by the difference of [superscript 83m]Kr conversion electron lines at the KATRIN experiment
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10052_2018_Article_5832.pdf
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Author(s)
Arenz, M.
Baek, W.-J.
Beck, M.
Beglarian, A.
Behrens, J.
Bergmann, T.
Berlev, A.
Besserer, U.
Blaum, K.
Bode, T.
Date Issued
May 2018
Journal
The European Physical Journal C
Publisher
Springer Berlin Heidelberg
Citation
Arenz, M., et al. “Calibration of High Voltages at the Ppm Level by the Difference of [superscript 83m] Kr Conversion Electron Lines at the KATRIN Experiment.” The European Physical Journal C, vol. 78, no. 5, May 2018. © 2018 The Authors
Version
Final published version
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 [superscript 83m]Kr 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-018-5832-y
