Speaker
Gregorio Roper
(RWTH Aachen)
Description
Using thin scintillating fibers with Silicon Photo Multiplier (SiPM) readout a
modular high resolution charged particle tracking detector has been
developed. The fiber modules consist of eight layers of 128 round multiclad
Bicron BCF-20 scintillating fibers of 0.250 mm diameter. They are
mechanically stabilized by a carbon fiber airex structure (2 x 0.1 mm CF
skins, 5 mm airex foam). The fibers are read out by four SiPM arrays (8 mm
x 1 mm) each with 32 channels on both ends of the module. The use of
SiPM arrays for the fiber readout allows a compact design and does not
require any cooling, unlike existing scintillating fiber trackers. The basic
features of this detector concept have been evaluated in a test beam in
October 2006 using novel SiPM detectors with improved photon detection
efficiency. We will present the measured spatial resolution, efficiency and
signal-over-noise ratio for this setup and compare them to GEANT 4
simulations. Such a detector concept could be very interesting for future
applications, for example as an outer layer of an ILC detector or for
astroparticle physics experiments.
Author
Gregorio Roper
(RWTH Aachen)
