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Your search keyword '"T. Krähenbühl"' showing total 2 results
Start Over Author "T. Krähenbühl" Publisher elsevier bv
2 results on '"T. Krähenbühl"'

1. FACT—The first Cherenkov telescope using a G-APD camera for TeV gamma-ray astronomy

Author

Q. Weitzel, Oliver Grimm, Karl Mannheim, M. Domke, K. Warda, Felicitas Pauss, T. Krähenbühl, E. Lorenz, Dieter Renker, D. Neise, Adrian Biland, S. Commichau, D. Hildebrand, Patrick Vogler, Thomas Bretz, U. Horisberger, V. Commichau, Ilana M. Braun, Ulf Roser, H. von Gunten, L. S. Stark, B. Krumm, J.-H. Köhne, Daniel Kranich, Wolfgang Rhode, A. Boller, M. Rissi, A. Gendotti, Werner Lustermann, J.-P. Stucki, O. Tibolla, G. Viertel, Daniela Dorner, M. Ribordy, H. Anderhub, and Michael Backes

Subjects
Physics, Nuclear and High Energy Physics, business.industry, Cherenkov detector, Astronomy, IACT, Gamma-ray astronomy, Avalanche photodiode, Cherenkov Telescope Array, law.invention, Telescope, Crab Nebula, Optics, law, business, Instrumentation, Cherenkov radiation
Abstract

Geiger-mode Avalanche Photodiodes (G-APD) bear the potential to significantly improve the sensitivity of Imaging Air Cherenkov Telescopes (IACT). We are currently building the First G-APD Cherenkov Telescope (FACT) by refurbishing an old IACT with a mirror area of 9.5 square meters and are constructing a new, fine-pixelized camera using novel G-APDs. The main goal is to evaluate the performance of a complete system by observing very high energy gamma-rays from the Crab Nebula. This is an important field test to check the feasibility of G-APD-based cameras to replace at some time the PMT-based cameras of planned future IACTs like AGE and CTA. In this article, we present the basic design of such a camera as well as some important details. (C) 2010 Elsevier B.V. All rights reserved.

Published
2011

2. Results of the prototype camera for FACT

Author

M. Rissi, D. Neise, Q. Weitzel, Karl Mannheim, A. Boller, M. Ribordy, E. Lorenz, J.-P. Stucki, Oliver Grimm, H. Anderhub, V. Commichau, H. von Gunten, Michael Backes, Werner Lustermann, T. Krähenbühl, G. Viertel, Daniel Kranich, Ilana M. Braun, Daniela Dorner, Thomas Bretz, Felicitas Pauss, Patrick Vogler, Wolfgang Rhode, O. Tibolla, Dieter Renker, U. Horisberger, D. Hildebrand, Ulf Roser, A. Gendotti, Adrian Biland, S. Commichau, L. S. Stark, and J.-H. Köhne

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Photon, Geiger-mode Avalanche Photodiode, business.industry, Gamma-ray astronomy, Avalanche photodiode, Avalanche Photodiodes, Particle detector, Photodiode, law.invention, Telescope, Optics, Cherenkov telescope, law, business, Instrumentation, Cherenkov radiation, Computer hardware, Gamma-ray Astronomy
Abstract

The maximization of the photon detection efficiency (PDE) is a key issue in the development of cameras for Imaging Atmospheric Cherenkov Telescopes. Geiger-mode Avalanche Photodiodes (G-APD) are a promising candidate to replace the commonly used photomultiplier tubes by offering a larger POE and in addition a facilitated handling. The FACT (First G-APD Cherenkov Telescope) project evaluates the feasibility of this change by building a camera based on 1440 G-APDs for an existing small telescope. As a first step towards a full camera, a prototype module using 144 G-APDs was successfully built and tested. The strong temperature dependence of G-APDs is compensated using a feedback system, which allows to keep the gain of the G-APDs constant to 0.5%. (C) 2010 Elsevier B.V. All rights reserved.

Published
2011

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