SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 71: Exp. Methods AP, PMTs

T 71.6: Vortrag

Mittwoch, 22. März 2023, 17:05–17:20, POT/0081

Investigation of photomultiplier photocathodes with an ellipsometer — •Berit Schlüter and Alexander Kappes — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany

Photomultiplier tubes (PMTs) are a central component of today's neutrino telescopes such as IceCube and KM3NeT, and an accurate understanding and measurement of their properties is indispensable for further improvement of the detectors. In my talk I focus on the optical properties of the photocathode, which is only a few 10 nanometers thick and will be investigated using an ellipsometer. As part of my master's thesis, I set up the ellipsometer and used it to characterize flat samples. Currently, the setup is being extended for the measurement of curved photocathodes as part of my PhD thesis. This talk presents the idea of the measurement as well as the current status of the work.