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.