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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 3: Instrumentation and Methods for Micro- and Nanoanalysis (joint session KFM/CPP)

KFM 3.2: Talk

Monday, March 27, 2023, 14:50–15:10, POT 106

Novel techniques for low-energy positron beam diagnostics. — •Francesco Guatieri, Michael Berghold, and Michael Zimmermann — Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748 Garching, Germany

Modern surface analysis techniques based on low-energy positron annihilation require the use of a stable, focused and intense particle beam. Although several techniques are available to beam scientists to measure position, shape and intensity of a positron beam, each comes with its own limitations either in terms of precision, cost or measurement time. We will present two innovative techniques to detect low-energy positrons with the goal of performing beam optimization, each of which improves onto the previous state of the art.