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T: Fachverband Teilchenphysik

T 92: Strahlenschäden (gemeinsam mit HK)

T 92.6: Vortrag

Mittwoch, 29. März 2017, 18:00–18:15, F 234

Dark Current of Neutron Irradiated SiPMs — •Svenja Nadine Sonder¹, Matteo Centis Vignali^{1, 2}, Erika Garutti¹, Robert Klanner¹, and Jörn Schwandt¹ — ¹Institut für Experimentalphysik, Universität Hamburg, Germany — ²CERN, Geneva, Switzerland

Silicon photomultipliers (SiPMs) have become popular as photon detectors in high-energy physics and many other fields due to their excellent performance. One major limitation, especially for the use in colliders, is the radiation damage by hadrons. In this talk, SiPMs with 3484 pixels of 15x15 µm² produced by the company KETEK have been irradiated with reactor neutrons to different fluences up to 10¹² n_eq/cm² (1 MeV equivalent neutrons). Current-voltage measurements have been performed at different temperatures between -30^∘C and +30^∘C. To better understand the generation of the dark current, parameters like the breakdown voltage and the activation energy given by the Arrhenius model have been investigated. A parameterization, which describes the temperature and dose dependence of the current-voltage results within 5%, is presented.