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Neutral tritium gas reduction in the KATRIN differential pumping sections

KATRIN Collaboration; Marsteller, A.; Bornschein, B.; Bornschein, L.; Drexlin, G.; Friedel, F.; Gehring, R.; Grohmann, S.; Gumbsheimer, R.; Hackenjos, M.; Jansen, A.; Kosmider, A.; LaCascio, L.; Lichter, S.; Müller, K.; Priester, F.; Rinderspacher, R.; Röllig, M.; Röttele, C.; Sharipov, F.; Sturm, M.; ... mehr

Abstract (englisch):
The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the effective electron anti-neutrino mass with an unprecedented sensitivity of 0.2 eV/c$^{2}$, using $\beta$-electrons from tritium decay.
The electrons are guided magnetically by a system of superconducting magnets through a vacuum beamline from the windowless gaseous tritium source through differential and cryogenic pumping sections to a high resolution spectrometer and a segmented silicon pin detector.
At the same time tritium gas has to be prevented from entering the spectrometer.
Therefore, the pumping sections have to reduce the tritium flow by more than 14 orders of magnitude.
This paper describes the measurement of the reduction factor of the differential pumping section performed with high purity tritium gas during the first measurement campaigns of the KATRIN experiment.
The reduction factor results are compared with previously performed simulations, as well as the stringent requirements of the KATRIN experiment.

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Verlagsausgabe §
DOI: 10.5445/IR/1000127397
Veröffentlicht am 07.01.2021
Originalveröffentlichung
DOI: 10.1016/j.vacuum.2020.109979
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Institut für Astroteilchenphysik (IAP)
Institut für Technische Thermodynamik und Kältetechnik (ITTK)
Institut für Technische Physik (ITEP)
Institut für Kernphysik (IKP)
KIT-Zentrum Elementarteilchen- und Astroteilchenphysik (KCETA)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0042-207X
KITopen-ID: 1000127397
Erschienen in Vacuum
Verlag Elsevier
Band 184
Seiten Art.-Nr.: 109979
Vorab online veröffentlicht am 08.12.2020
Schlagwörter KATRIN experiment, Vacuum measurement, Tritium, Gas flow, Pumping speed, TPMC simulation
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