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Mainz 2014 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 44: Detektorsysteme 2

T 44.8: Vortrag

Montag, 24. März 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 Tick51Max 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.

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