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Calibration of high voltages at the ppm level by the difference of $$^{83{\mathrm{m}}}$$ 83m Kr conversion electron lines at the KATRIN experiment
- Source :
- European Physical Journal C: Particles and Fields, Vol 78, Iss 5, Pp 1-7 (2018), European Physical Journal
- Publication Year :
- 2018
- Publisher :
- SpringerOpen, 2018.
-
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 $$^{83{\mathrm{m}}}$$ 83m Kr conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN’s commissioning measurements in July 2017. The measured scale factor $$M=1972.449(10)$$ 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.
Details
- Language :
- English
- ISSN :
- 14346052 and 14346044
- Volume :
- 78
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- European Physical Journal C: Particles and Fields
- Accession number :
- edsair.dedup.wf.001..a24bd34c7e301ed71023f1502de0fd43