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Time-dependent simulation of the flow reduction of D2 and T2 in the KATRIN experiment

Friedel, F.; Röttele, C.; Schimpf, L.; Wolf, J.; Drexlin, G.; Hackenjos, M.; Jansen, A.; Steidl, M.; Valerius, K.

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the effective electron anti-neutrino mass with an unprecedented sensitivity of 0.2 eV/c², using β-electrons from tritium decay. Superconducting magnets will guide the electrons through a vacuum beamline from the windowless gaseous tritium source through differential and cryogenic pumping sections to a high resolution spectrometer. 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 at least 14 orders of magnitude. This paper describes various simulation methods in the molecular flow regime used to determine the expected gas flow reduction in the pumping sections for deuterium (commissioning runs) and for radioactive tritium. Simulations with MolFlow+ and with an analytical model are compared with each other, and with the stringent requirements of the KATRIN experiment.

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Verlagsausgabe §
DOI: 10.5445/IR/1000087598
Veröffentlicht am 22.01.2019
Seitenaufrufe: 19
seit 30.01.2019
Downloads: 19
seit 09.02.2019
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 0042-207X, 1879-2715
KITopen-ID: 1000087598
HGF-Programm 51.03.01 (POF III, LK 01)
Erschienen in Vacuum
Band 159
Seiten 161-172
Schlagworte KATRIN experiment, Cryogenic pump, Pumping speed, Tritium, TPMC simulation
Nachgewiesen in Web of Science
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