München 2009 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 104: Niederenergie-Neutrinophysik & Suche nach dunkler Materie 5

T 104.6: Vortrag

Freitag, 13. März 2009, 15:20–15:35, A140

Calibration setup for testing vacuum-capabilities of the DPS2-F for KATRIN — •Aleksandra Gotsova — Universität Karlsruhe (TH), Institut für Experimentelle Kernphysik

The Karlsruhe Tritium Neutrino experiment (KATRIN) aims to determine the neutrino mass from the tritium β-decay with 0.2eV sensitivity. The KATRIN setup consists of a tritium source, a transport system with differential (DPS) and a cryogenic pumping sections, a pre- and main spectrometer and a detector. The determination of the neutrino mass relies on the precise investigation of the high energy end of the tritium β spectrum using a high energy resolution electrostatic spectrometer with adiabatic magnetic collimation. The main objectives for the STS are: providing a windowless gaseous tritium source for the β-decay suppressing the tritium flow to the spectrometer by 14 orders of magnitude; preventing penetration of low energy ions to the spectrometer. The main differential pumping system (DPS2-F) consists of 5 beam tube sections separated by pumping chambers pumped by TMPs. Its tritium flow reduction factor (TRF) is expected to be 10e5. Inside the DPS2-F β-electrons are guided by SC solenoids with B = 5.6T. To measure the gas amounts being transferred through the DPS and to verify the TRF between the inlet and outlet part of the DPS2-F an injection-collection system (ICS) was built up as a test experiment. This talk reports on the complete test and calibration procedures of the ICS. In part supported by BMBF project 05CK5VKA/5 and by DFG in SFB/TR27 TP A1.