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Commissioning of the vacuum system of the KATRIN Main Spectrometer

KATRIN Collaboration; Arenz, M.; Babutzka, M.; Bahr, M.; Barrett, J. P.; Bauer, S.; Beck, M.; Beglarian, A.; Behrens, J.; Bergmann, T.; Besserer, U.; Bluemer, J.; Bodine, L. I.; Bokeloh, K.; Bonn, J.; Bornschein, B.; Bornschein, L.; Buesch, S.; Burritt, T. H.; Chilingaryan, S.; ... mehr

Abstract (englisch): Abstract: The KATRIN experiment will probe the neutrino mass by measuring the -electron energy spectrum near the endpoint of tritium -decay. An integral energy analysis will be performed by an electro-static spectrometer (“Main Spectrometer”), an ultra-high vacuum vessel with a length of 23.2 m, a volume of 1240m3, and a complex inner electrode system with about 120 000 individual parts. The strong magnetic field that guides the -electrons is provided by super-conducting solenoids at both ends of the spectrometer. Its influence on turbo-molecular pumps and vacuum gauges had to be considered. A system consisting of 6 turbo-molecular pumps and 3 km of non-evaporable getter strips has been deployed and was tested during the commissioning of the spectrometer. In this paper the configuration, the commissioning with bake-out at 300 C, and the performance of this system are presented in detail. The vacuum system has to maintain a pressure in the 10􀀀11 mbar range. It is demonstrated that the performance of the system is already close to these stringent functional requirements for the KATRIN experiment, which will start at the end of 2016.

Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Institut für Technische Physik (ITEP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1088/1748-0221/11/04/P04011
ISSN: 1748-0221
URN: urn:nbn:de:swb:90-552918
KITopen ID: 1000055291
HGF-Programm 51.54.01; LK 01
Erschienen in Journal of Instrumentation
Band 11
Seiten P04011
Schlagworte Gas systems and purification, Neutrino detectors, Spectrometers, Vacuum-based detectors
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