Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 12: Astroteilchenphysik: Methoden I
T 12.2: Vortrag
Montag, 25. März 2019, 16:15–16:30, S12
Superconductive cryogenic detectors for rare event searches — •Elizabeth Mondragón1, Stephan Geprägs3, Luca M. Pattavina1, Federica Petricca2, Stefan Schönert1,2, Raimund Strauss1, Andreas Erhart1, Angelina Kinast1, Alexander Langenkämper1, Tobias Ortmann1, and Walter Potzel1 — 1Physik-Department, Technische Universität München, Garching — 2Max-Planck-Institut für Physik, München — 3Walther-Meißner-Institut für Tieftemperaturforschung, Garching
We present first results obtained with novel cryogenic detectors coated with a thin Nb superconductive film. The smaller band gap of superconductors (meV) allows an improved light collection and enlarges the light absorption to the infrared. The detectors are equipped with transition edge sensors made from a superconducting W film operated in the steep transition to normal conduction. Detectors of this type are particularly suited as cryogenic light detectors for rare event searches that use phonon-light event-by-event particle discrimination, such as for the CRESST direct dark matter experiment. Further, we discuss the potential of superconducting bulk detectors. Such devices offer the possibility to discriminate particle interactions by the different decay times of phonons and quasiparticles down to low energies (below 100 eV). This technology is highly suited for direct dark matter searches like CRESST and for detecting coherent neutrino nucleus scattering like in the nuCLEUS experiment. This work has been supported in part by the German Federal Ministry for Education and Research (BMBF) and the German Research Foundation (DFG) via the SFB1258.