Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 46: Laser Applications: Laser Spectroscopy
Q 46.6: Vortrag
Mittwoch, 25. März 2015, 15:45–16:00, K/HS2
Laser Raman spectroscopy a tool for tritium analytics: an overview — •Timothy M. James1, Sebastian Fischer1, Simone Rupp1, Andreas Off1, Hendrik Seitz-Moskaliuk1, Matthias Wecker1, Michael Sturm1, Magnus Schloesser2, Helmut H. Telle2, and Beate Bornschein1 for the KATRIN collaboration — 1Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Univesidad Complutense de Madrid, Madrid, Spain
Laser Raman spectroscopy is a non-contact, non-destructive, multi-species analysis method, which can provide accurate and quantifiable composition information. Our laser Raman system has been developed such that it can be used to monitor inline the source gas composition of the Karlsruhe Tritium Neutrino Experiment and as a standard gas processing system at the Tritium Laboratory Karlsruhe (TLK).
In this presentation we give an overview of the recent research activities on the various aspects of Raman spectroscopy in gas analytics at the TLK. A stable and precise (<0.1%) composition with a high calibration accuracy of better than 3% is obtained from the system. Recent long term measurements with acquisition times of the order of 60s over periods of several weeks verify the usability of the system for real-time, inline and accurate gas analysis. During longer term operation laser induced contamination of optical components has been observed which reduces the Raman intensity over the run period. Potential solutions to this problem will be summarised. Finally, new approaches are also pursued at the TLK to further enhance the sensitivity of Raman spectroscopy for gas analytics. These techniques will be summarised.