Berlin 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 7: Experimental Techniques 1
MO 7.7: Vortrag
Dienstag, 18. März 2014, 12:00–12:15, BEBEL SR144
Data Analysis for the TApIR Experiment — •Alexander Kraus, Robin Größle, and Sebastian Mirz — Karlsruhe Institute of Technology (KIT), Institute of Technical Physics (ITEP), Tritium Laboratory Karlsruhe (TLK)
Nuclear fusion reactors like ITER and DEMO require a fuel cycle with infrastructure for gas recycling. Part of this infrastructure is a facility that separates the six hydrogen isotopologues (Q2) by cryogenic distillation. For this system, an inline, non-invasive method for real-time monitoring of the Q2 concentrations is needed. The Tritium Absorption Infrared Spectroscopy (TApIR) experiment was deployed at the TLK in order to test the suitability of IR spectroscopy for this purpose.
With the experimental setup, Fourier Transform Infrared (FTIR) interferograms can be measured. Those interferograms are then processed by a software that applies a Discrete Fourier Transform (DFT). Results of the conventional data analysis in FTIR spectroscopy include transmission functions with a baseline different from one. For this reason, a Rolling Circle Filter (RCF) is included into the analysis procedure and optimized to remove this effect. From the resulting sample transmission functions, calibration quantities, like integrated absorbances, are then calculated. These can be used for a calibration with Q2 concentrations, which are measured externally by an independet laser raman system, or, if a calibration exists, for the determination of Q2 concentrations in unknown sample mixtures. In this talk, the different analysis steps will be presented and compared to the conventional analysis procedure in infrared spectroscopy.