München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 66: Detektorsysteme 2

T 66.8: Talk

Thursday, March 12, 2009, 18:40–18:55, A016

Prototype Modules For A High-Resolution Scintillating Fiber Tracker — •Gregorio Roper Yearwood¹, Henning Gast¹, Roman Greim¹, Thomas Kirn¹, Stefan Schael¹, and Tatsuya Nakada² — ¹I. Physikalisches Institut, RWTH Aachen, Deutschland — ²Ecole Polytechnique Fédérale de Lausanne, Schweiz

We present a prototype module for the first tracking detector consisting of 250 µ m thin scintillating fibers and silicon photomultiplier (SiPM) arrays. The prototype has been tested in a 10 GeV proton beam at the proton synchrotron, CERN, during which a spatial resolution of 88 µ m was measured at a detection efficiency better than 99%. Based on studies using a Ru-106 β-source and Monte-Carlo simulations we show how these results can be improved by optimizing the coupling between SiPM arrays and fibers as well as the dependence of the measured spatial resolution on the operating voltage applied to the SiPM.