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T: Fachverband Teilchenphysik
T 50: Neutrinomasse II
T 50.2: Vortrag
Dienstag, 1. März 2016, 17:00–17:15, VMP5 SR 0079
Status of the Cryogenic Pumping Section of the KATRIN Experiment — •Carsten Röttele for the KATRIN collaboration — Institut für Kernphysik (IKP), Karlsruhe Institute of Technology (KIT)
The Karlsruhe Tritium Neutrino (KATRIN) experiment uses the kinematics of tritium β-decay to determine the electron antineutrino mass with a sensitivity of mν=200 meV/c2 (90 % C.L.).
In order to measure the decay electrons it is important to guide them adiabatically from the source to the spectrometer.
In addition the diffusion of tritium into the spectrometers from the source has to be reduced by 14 magnitudes of order as tritium inside the spectrometers would induce additional background.
For these two tasks the transport and pumping section were constructed.
The last part of this section is the Cryogenic Pumping Section (CPS), which aims to reduce the residual gas flow by not less than seven orders of magnitude.
For this a 3 K cold argon frost area (surface ≈ 2 m2) will be prepared to adsorb the incoming tritium molecules.
This talk will present the milestones which were reached since the CPS arrived on 30th July 2015 on KIT.
Amongst others the calculations of the magnetic flux tube through the CPS based on as-built measurements of the coil geometries are presented.