Un tracciatore a fibre scintillanti per monitoring e tracking di fasci di alta intensità

Scintillating fiber detectors are widely used in high energy physics for their excellent characteristics in terms of fast response that makes them ideal for monitoring and triggering in a wide range of intensities. A coarse but fast monitoring/tracking system based on scintillating fibers has been built during the “Laboratorio di Fisica IV” course at the Insubria University dedicated to particle and nuclear physics. The detector consists of two modules placed at a distance of 20 cm; each module contains two layers of 1 mm diameter scintillating fibers organized in a x-y way. Each layer features 128 fibers organized in a doublet ribbon geometry to reduce the dead zones and improve the spatial resolution. The fibers are connected to one multi anode photomultiplier per layer through two different coupling masks and the electronics is based on the VA64TAP2.1 and LS64_2 ASICs (from Gamma - Medica IDEAS) and standard VME boards. This thesis work deals with the construction and the commissioning of the detector and the analysis of the experimental data. The tracker has been characterized at the Beam Test Facility (BTF) of the Frascati INFN National Laboratories (LNF) and has also been used, together with a high precision tracking system based on microstrip silicon detectors, at the CERN H8 SPS beam line to study the channeling and volume reflection effects of a bent silicon crystal.