München 2009 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 104: Niederenergie-Neutrinophysik & Suche nach dunkler Materie 5
T 104.5: Vortrag
Freitag, 13. März 2009, 15:05–15:20, A140
Tests with the second Differential Pumping Section for KATRIN — •Strahinja Lukic — Universität Karlsruhe, Institut für Experimentelle Kernphysik
The KArlsruhe TRItium Neutrino experiment (KATRIN) aims at determining electron-neutrino mass from the beta-decay of tritium with unprecedented sensitivity of 0.2 eV/c2. KATRIN comprises a Windowless Gaseous Tritium Source (WGTS), an electron-transport section, two high resolution electrostatic spectrometers and an electron detector. Along the electron-transport section, tritium will be pumped out for reprocessing and reinsertion into the source. Two stages of differential pumping followed by a cryogenic pumping system must reduce the tritium gas flow by a total factor of 1014 in order to avoid distortion of the electron energy spectrum and contamination of the spectrometers. In particular, the second Differential Pumping Section (DPS2-F) is constructed to reduce the flow of 10−2 mbar l/s at its input by at least a factor of 105. Beside that, DPS2-F will host devices for monitoring the concentration of ions produced in the WGTS and for their removal. In this talk a series of experiments will be described that aim at testing gas-flow reduction capabilities of the pumping section, as well as the performance of systems for ion-concentration measurement and for ion removal.
Supported by DFG in the framework of the SFB TR27.