Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 71: Niederenergie Neutrinophysik V
T 71.2: Vortrag
Mittwoch, 11. März 2015, 17:05–17:20, I.13.70 (HS 27)
Commissioning of the KATRIN Raman system for monitoring of the WGTS gas composition — •Sebastian Fischer1, Beate Bornschein1, Timothy M. James1, Andreas Off1, Simone Rupp1, Magnus Schlösser2,1, Hendrik Seitz-Moskaliuk1, Michael Sturm1, Helmut H. Telle2, and Matthias Wecker1 — 1Karlsruhe Institute of Technology, Germany — 2Universidad Complutense de Madrid, Spain
The Karlsruhe Tritium Neutrino (KATRIN) Experiment aims at determining the neutrino mass by the investigation of the endpoint energy-region of the tritium β-spectrum. Tritium in its molecular form (3H2) is injected into the Windowless Gaseous Tritium Source (WGTS) of KATRIN, and thus molecular effects, e.g. ro-vibrational excitations levels, have to be considered in the neutrino mass analysis in order to reach the design sensitivity of 200 meV/c2 (90% C.L.). As the source gas also contains impurities of the other hydrogen isotopes protium and deuterium - giving rise to different molecular excitation levels - continuous and precise monitoring of the source gas composition is required. Raman spectroscopy is the method of choice for this task as it is an inline and non-contact analysis method.
In this talk, results from the recently performed commissioning phase of the KATRIN Raman system will be presented: over the course of more than 50 days, consecutive Raman spectra (recorded with acquisition times of 60 s) of circulating tritium gas were acquired and analysed in real-time. In addition, valuable information on the system performance during long-term operation was gained.