Accurate Calibration of Raman Systems

Dr. Magnus Schlösser is an experimental physicist with research interests in optical spectroscopy and astroparticle physics. He graduated at the Karlsruhe Institute of Technology in 2009 and was awarded a PhD with distinction in 2013. The PhD project was conducted at the interface of his research interests by developing, characterising and calibrating a Raman system for the accurate measurement of the isotopic purity of the gaseous tritium source at the Karlsruhe Tritium Neutrino Experiment. During the time of the PhD studies he contributed to more than 10 scientific publications and has presented his work at international and national scientific conferences, as well as to the public. Currently, he is investigating further applications of optical spectroscopy for tritium process technology and beyond, with the aim of enhanced sensitivity, high versatility and long-term stability.

Introduction.- The KATRIN Experiment.- Theory of Quantitative Raman spectroscopy.- Experimental Setup.- Calibration Based on Theoretical Intensities and Spectral Sensitivity.- Calibration Based on Accurate Gas Samples.- Comparison of Calibration Methods.- Summary and Outlook.- Appendix A Statistical Terms.- Appendix B Complete Derivation of Integration Formula for Depolarization Measurements.- Appendix C Jones Calculations for Polarization Aberrations in the Raman Collection System.- Appendix D Measurements of Polarization Aberrations in Raman Cell Windows.- Appendix D Error Estimation in Depolarization Ratio Measurements.- Appendix F Relation Between Experimental Error of Raman Intensities and Depolarization Ratios.- Appendix H Demonstration of Bootstrapping on HYDE Data.- Appendix I Publications.