By Magnus Schlösser
This thesis reviews significant contributions to constructing and enforcing new laser-spectroscopic precision instruments to continually computer screen the isotope content material of the windowless gaseous tritium resource of KATRIN. the strategy of selection, Raman spectroscopy, is excellent for in-situ tracking of all six hydrogen isotopologues. In a chain of gorgeous experiments the writer bought autonomous novel calibration tools, first in accordance with a comparability of experimental Raman depolarization ratios with corresponding quantum-chemical calculations, and moment on a gasoline sampling method. either tools yield constant cross-calibration effects and, in addition to yielding advancements in precision, could be of significant value in decreasing systematic results in long term neutrino mass measurements. The equipment constructed during this thesis even have nice capability to additional increase the functions of Raman spectroscopy to review prolonged assets akin to in atmospheric physics.
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