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25 April 2024

» arxiv » 2009.10403

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Neutral tritium gas reduction in the KATRIN differential pumping sections
Alexander Marsteller ; Beate Bornschein ; Lutz Bornschein ; Guido Drexlin ; Fabian Friedel ; Rainer Gehring ; Steffen Grohmann ; Rainer Gumbsheimer ; Moritz Hackenjos ; Alexander Jansen ; Andreas Kosmider ; Luisa LaCascio ; Steffen Lichter ; Klaus Müller ; Florian Priester ; Rolf Rinderspacher ; Marco Röllig ; Carsten Röttele ; Felix Sharipov ; Michael Sturm ; Stefan Welte ; Joachim Wolf ;
Date:	22 Sep 2020
Abstract:	The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the effective electron anti-neutrino mass with an unprecedented sensitivity of $0.2,mathrm{eV}/mathrm{c}^2$, using $eta$-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.
Source:	arXiv, 2009.10403
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