Hamburg 2016 – scientific programme
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T: Fachverband Teilchenphysik
T 98: Experimentelle Methoden III
T 98.6: Talk
Thursday, March 3, 2016, 18:10–18:25, VMP8 SR 105
Design of a tritium compatible spectroscopy experiment for hydrogen istopologues for temperatures between 15-293 K — •Sebastian Mirz, Tim Brunst, Robin Größle, and Bennet Krasch — Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP), Tritium Laboratory Karlsruhe (TLK)
The Karlsruhe Tritium Neutrino Experiment (KATRIN) investigates the energy spectrum of the tritium β decay near its energetic endpoint in order to determine the electron anti-neutrino mass with a sensitivity of 200 meV/c2 (90% C.L.). Therefore, molecular tritium gas is decaying in a windowless gaseous tritium source (WGTS). The physical properties of the gas in the WGTS, like composition, ortho/para ratio or rotational population, need to be stabilised on a 10−3 level due to their direct impact on the initial state distribution of the investigated β decay. The new experiment T2ApIR is designed to be fully tritium compatible to perform IR and Raman spectroscopic measurements on all six hydrogen isotopologues under conditions similar to the KATRIN WGTS. Therefore, T2ApIR will provide a combination of a chemical and a coolable ortho/para catalyst, in order to produce isotope mixtures with non-equilibrium chemical and ortho-para compositions. The produced gas mixtures are examined with a second Raman analysis system, able to simultaneously determine the chemical and ortho/para composition in the gas phase. This contribution presents the design of the new T2ApIR experiment with the focus on the investigation of molecular processes, as e.g. the formation of van-der-Waals clusters.