Calibration of high voltages at the ppm level by the difference of Kr-83m conversion electron lines at the KATRIN experiment
- Authors: Arenz M; Baek WJ; Beck M; Beglarian A; Behrens J; Bergmann T; Berlev A; Besserer U; Blaum K; Bode T; Bornschein B; Bornschein L; Brunst T; Buzinsky N; Chilingaryan S; Choi WQ; Deffert M; Doe PJ; Dragoun O; Drexlin G; Dyba S; Edzards F; Eitel K; Ellinger E; Engel R; Enomoto S; Erhard M; Eversheim D; Fedkevych M; Fischer S; Formaggio JA; Frankle FM; Franklin GB; Friedel F; Fulst A; Gil W; Gluck F; Urena AG; Grohmann S; Grossle R; Gumbsheimer R; Hackenjos M; Hannen V; Harms F; Haussmann N; Heizmann F; Helbing K; Herz W; Hickford S; Hilk D; Hillesheimer D; Howe MA; Huber A; Jansen A; Kellerer J; Kernert N; Kippenbrock L; Kleesiek M; Klein M; Kopmann A; Korzeczek M; Kovalik A; Krasch B; Kraus M; Kuckert L; Lasserre T; Lebeda O; Letnev J; Lokhov A; Machatschek M; Marsteller A; Martin EL; Mertens S; Mirz S; Monreal B; Neumann H; Niemes S; Off A; Osipowicz A; Otten E; Parno DS; Pollithy A; Poon AWP; Priester F; Ranitzsch PCO; Rest O; Robertson RGH; Roccati F; Rodenbeck C; Rollig M; Rottele C; Rysavy M; Sack R; Saenz A; Schimpf L; Schlosser K; Schlosser M; Schonung K; Schrank M; Seitz-Moskaliuk H; Sentkerestiova J; Sibille V; Slezak M; Steidl M; Steinbrink N; Sturm M; Suchopar M; Suesser M; Telle HH; Thorne LA; Thummler T; Titov N; Tkachev I; Trost N; Valerius K; Venos D; Vianden R; Hernandez APV; Weber M; Weinheimer C; Weiss C; Welte S; Wendel J; Wilkerson JF; Wolf J; Wustling S; Zadoroghny S
- Publication year: 2018
- Type: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/676347
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 conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN’s commissioning measurements in July 2017. The measured scale factor 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.