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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.; Corona, T. J.; ... mehr

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 2 ... mehr

Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Institut für Kernphysik (IKP)
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 Art. Nr. P04011
Schlagworte Gas systems and purification, Neutrino detectors, Spectrometers, Vacuum-based detectors
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