I'm working in the DESY group MSL, which performs R&D for super-conducting radio frequency (SRF) cavities. One of my key responsibilities is the coordination of vertical performance tests for these SRF cavities. During these tests parameters like accelerating gradient and quality factor are deduced.
I'm also responsible for the second sound system for quench spot localization. It is part of our diagnostic tools used during vertical tests and I have been supervising several students, who investigate systematics of second sound measurements, establish an analysis framework and develop a calibration tool for the second sound measurements. Another student, I take care of, is developing a magentic field mapping system, which will also be applied during vertical cavity testing.
An additonal aspect of my work is the organization of a two year training at DESY for chinese scientists from the SHINE project in Shanghai. This work is done in the scope of the CHILFEL program of the Helmholtz Association as well as the production supervision by DESY experts for 4 large grain cavties ordered by SHINE.
I'm also heavily involved in medium temperature treatment studies, which aim for better cavity performances. Such cavities with enlarged quality factor and simultanously remaining high accelerating gradients are needed for an envisaged continous wave upgrade for the European XFEL. A surface engineering by interstitial Oxygen via medium temperature treatments seems to be possible, hence such processes at about 300°C are implemented, analyzed and improved at the moment.
