Mainz 2014 – scientific programme
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T: Fachverband Teilchenphysik
T 44: Detektorsysteme 2
T 44.8: Talk
Monday, March 24, 2014, 18:30–18:45, GFH 01-721
A Hybrid Photon Detector for optical photon detection based on Timepix — •Felix Just1, Andrea Cavanna1, Mykhalo Filipenko2, Thilo Michel2, John Vallerga3, Anton S. Tremsin3, Jerome A. Alozy5, Gisela Anton2, Maria Chekhova1,2,6, Jeff Defazio4, Michael Campbell5, and Timo Tick5 — 1Max Planck Institute for Science of Light Gunther-Scharowsky-Str.1 Building 24 91058 Erlangen — 2University of Erlangen-Nürnberg, Staudstrasse 7/B2, 91058 Erlangen, Germany — 3Experimental Astrophysics Group, Space Science Laboratory, University of California Berkley, CA 94720, USA — 4IBM Zurich Research Laboratory, Säumerstraße 48803 Rüschlikon — 5CERN Geneva, Switzerland — 6Department of Physics, M.V.Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
A Hybrid Photon Detector (HPD) for optical photon detection was developed by the Medipix2 collaboration together with Photonis USA. The HPD is comprised of a photocathode, a chevron stack of (two) micro-channel plates and a 2×2 array of Timepix readouts giving an active area of 2.8×2.8 cm2 (512×512 pixels). The signals produced by the MCP stack avalanches (∼105 electrons) are sampled by the 55 µm pixels of the input electrode matrix of the Timepix readout with a pitch of 55 micrometers. Each pixel is able to measure the number of events within a frame or the collected charge in the pixel of a single avalanche or a time-stamp with a time-resolution of about 10−20 ns. In this contribution we will present results of test measurements of the new detector with respect to time-resolution and imaging capabilities.