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T: Fachverband Teilchenphysik

T 55: Suche nach Dunkler Materie 2 (Direkter Nachweis)

T 55.8: Vortrag

Dienstag, 28. März 2017, 18:40–18:55, VSH 19

Production of Sputtered Tungsten TES for the CRESST III Experiment — •Tobias Ortmann, Xavier Defay, Jean-Côme Lanfranchi, Alexander Langenkämper, Erik Lindner, Elizabeth Mondragón, Andrea Münster, Corbinian Oppenheimer, Walter Potzel, Stefan Schönert, Hong Hanh Trinh Thi, Andreas Ulrich, Stephan Wawoczny, Michael Willers, and Andreas Zöller — Technische Universität München, Physik Department Lehrstuhl E15 und Exzellenzcluster Universe, James-Franck-Straße 1, D-85748 Garching

The CRESST experiment (Cryogenic Rare Event Search with Superconducting Thermometers) searches for nuclear recoils events induced by elastic scattering of dark matter particles off the target nuclei within CaWO₄ target crystals. The detectors are operated at a temperature of O(10 mK) and consist of the target crystal and a seperate cryogenic detector. Both heat (phonon) and light signals are read out via a tungsten TES (Transition Edge Sensor) utilizing the superconduction phase transition of tungstent measure the energy deposited in the absorbers. So far the TES are produced via electron beam evaporation. In this work the production via argon ion sputtering is investigated in terms of film quality and reproductibility. The first results are presented. This work was supported by the DFG Excellenzcluster Origin and Structure of the Universe and the Maier-Leibnitz- Laboratory (Garching).