Dresden 2017 – wissenschaftliches Programm
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VA: Fachverband Vakuumphysik und Vakuumtechnik
VA 4: Poster Session
VA 4.4: Poster
Montag, 20. März 2017, 14:45–16:00, P2-OG3
Time dependent TPMC simulation of the KATRIN cryogenic pumping section — •Fabian Friedel and KATRIN Collaboration — Karlsruhe Institute of Technology (KIT), IEKP, Postfach 3640, 76021 Karlsruhe
The aim of the Karlsruhe Tritium Neutrino (KATRIN) experiment is to determine the effective mass of the electron antineutrino with a sensitivity of 200 meV/c2 (90% C.L.). This will be achieved by measuring the β-spectrum of tritium close to the kinematic endpoint at 18.6 keV. One main component of the experiment is the transport section which magnetically guides the beta electrons from the windowless gaseous tritium source to the spectrometer for energy measurement. An important part of the transport section is the Cryogenic Pumping Section (CPS) which has been designed to reduce the tritium flow by at least 7 orders of magnitude. The inner surface of the beam tubes is covered by a layer of 3-K-cold argon frost, cryosorbing the tritium. In order to confirm that this stringent requirement, the pumping performance of the CPS is currently tested with deuterium. In addition many TPMC simulations with MolFlow+ have been performed and an algorithm was developed to describe the time dependent evolution of the tritium reduction factor. This work has been supported by BMBF (05A14VK2), KSETA and the Helmholtz Association.