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Viser: Accurate Calibration of Raman Systems - At the Karlsruhe Tritium Neutrino Experiment
Accurate Calibration of Raman Systems
At the Karlsruhe Tritium Neutrino Experiment
Magnus Schlosser
(2016)
Sprog: Engelsk
Detaljer om varen
- Paperback
- Udgiver: Springer International Publishing AG (September 2016)
- ISBN: 9783319383453
This thesis reports major contributions to developing and implementing new laser-spectroscopic precision tools to continuously monitor the isotope content of the windowless gaseous tritium source of KATRIN. The method of choice, Raman spectroscopy, is ideally suited for in-situ monitoring of all six hydrogen isotopologues. In a series of beautiful experiments the author obtained two independent novel calibration methods, first based on a comparison of experimental Raman depolarization ratios with corresponding quantum-chemical calculations, and second on a gas sampling technique. Both methods yield consistent cross-calibration results and, as well as yielding improvements in precision, will be of major importance in reducing systematic effects in long-term neutrino mass measurements. The methods developed in this thesis also have great potential to further broaden the applications of Raman spectroscopy to study extended sources such as in atmospheric physics.