Stuttgart 2012 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 5: Experimental Techniques
MO 5.5: Vortrag
Montag, 12. März 2012, 17:30–17:45, V38.02
Accurate depolarization measurements of all six hydrogen isotopologues — •Magnus Schlösser1, Tim M. James2, Sebastian Fischer1, Richard J. Lewis3, Helmut H. Telle2, and Beate Bornschein1 — 1Tritium Laboratory Karlsruhe, Institute for Technicial Physics, Karlsruhe Insitute of Technology, GER — 2Department of Physics, Swansea University, UK — 3Instituto Pluridisciplinar, Universidad Complutense de Madrid, ES
The calibration of the Laser Raman system (LARA) of the KArlsruhe TRItium Neutrino experiment (KATRIN) is required for the accurate accountancy of the tritium gas in the source tube. In the current approach for the quantitative analysis of the LARA system, the experimentally measured spectrum will be compared to a theoretically calculated spectrum. The intensities of the theoretical spectra can be calculated from quantum mechanical matrix elements. However, these theoretical matrix elements, which can be found in literature, need experimental verification before they can be employed for the LARA analysis.
One elegant way to verify these matrix elements are the so-called depolarization measurements. In this presentation we show a novel methodology for these measurements and their analysis. This takes into account laser-polarisation related effects in optical components and considers the experimental geometry. Finally, the resulting depolarisation ratios of all hydrogen isotopologues (T2, DT, D2, HT, HD, H2) are presented.