Berlin 2018 – wissenschaftliches Programm
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VA: Fachverband Vakuumphysik und Vakuumtechnik
VA 2: Vacuum Generation and Measurement
VA 2.2: Vortrag
Montag, 12. März 2018, 11:00–11:30, A 060
In-situ calibration of vacuum gauges in the KATRIN spectrometer system — Philipp Triebskorn, •Joachim Wolf, and KATRIN Collaboration — Karlsruhe Institute of Technology (KIT), ETP, Postfach 3640, 76021 Karlsruhe
The Karlsruhe Tritium Neutrino (KATRIN) experiment uses the kinematics of electrons from the tritium β-decay to determine the effective neutrino mass with a sensitivity of mν= 200 meV/c2 (90% C.L.). The energy of the β-electrons, produced in the windowless gaseous tritium source (WGTS), is measured in the Spectrometer section at a pressure in the range of 10−11 mbar. The spectrometer section consists of the Pre-Spectrometer (8.5 m3), the huge Main Spectrometer (1240 m3), and the detector section, where electrons that pass the electrostatic filter of the Main Spectrometer, are counted. For to the low pressure regime in the KATRIN spectrometers the vacuum gauges (Inv. Magnetron, Extractor, RGA) are calibrated regularly in-situ at pressures between 10−10 and 10−7 mbar, using various constant gas flows of Ar, He, H2, and N2. Here we describe the calibration system and procedure. We acknowledge the support by KSETA, BMBF (05A17VK2), HAP and the Helmholtz association.