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Institut für Astronomie und Astrophysik

Abteilung Astronomie

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Preprint 04b/12

MCP detector development for WSO-UV

Sebastian Diebold (1), Jürgen Barnstedt (1), Hans-Rudolf Elsener (2), Philipp Ganz (3), Stephan Hermanutz (1), Christoph Kalkuhl (1), Norbert Kappelmann (1), Marc Pfeifer (1), Daniel Schaadt (4), Thomas Schanz (1), Omar Tanirah (3), Klaus Werner (1)

(1) Institute for Astronomy and Astrophysics (IAAT), University of Tübingen, Sand 1, Tübingen, Germany
(2) Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, Switzerland
(3) Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1a, Karlsruhe, Germany
(4) Institute of Energy Research and Physical Technologies, Clausthal University of Technology, Leibnizstraße 4, Clausthal, Germany

Proc. SPIE 8443 (2012), 84432X-1

Abstract. The spectrographs of WSO-UV cover the wavelength range of 102 - 310 nm. The essential requirements for the associated detectors are high quantum efficiency, solar blindness, and single photon detection. To achieve this, we develop a microchannel plate detector in a sealed tube. We plan to use cesium activated gallium nitride as semitransparent photocathode, a stack of two microchannel plates and a cross strip anode with advanced readout electronics. Challenges are the degradation of the photocathode under atmospheric conditions and the sealing process. We present the detector concept, details of the transfer and sealing processes under UHV, and the current status.
Key words: Photon detector, UV detector, MCP, sealed tube, indium sealing, WSO-UV

Preprint (2,05 Mb PDF file including figures)

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