Scintillating detectors

Pipe Side Wall
Long-standing LHEP experience in development of scintillating detectors allowed us to make significant contribution to Short-Baseline Neutrino research program at Fermilab with
the Scintillating Cosmic Ray Tagger (CRT). The system is composed of individual scintillator modules readout by Silicon PhotoMultipliers.
The modules are developed and produced at the Laboratory for High Energy Physics (LHEP) in Bern.
Design highlights:
   High light yield (20-30 photoelectrons per crossing muon)
   Time resolution ~ 2ns RMS
   Coordinate resolution ~1.8 cm RMS
   Compact design with geometrical efficiency of up to 98%
   Robust mechanical design
   High-speed Etherned backend

Each scintillator module consists of a row of 16 mechanically joined 10.8 cm wide scintillator strips placed side by side in a protective aluminum casing. The thickness of the case walls is 2 mm; this provides the necessary mechanical stability. Strips are fixed within the module by a 0.1 mm thick double-sided adhesive layer. The gap between two adjacent strips in a module is kept below 0.2 mm. The length of the modules varies from 2.3 m to 4.1 m, for three different widths: 0.97 m, 1.75 m and 1.81 m.

After assembly, modules and readout electronics are tested for proper operation. These tests verify the full readout chain, characterize the efficiency of cosmic muon detection in each module, and measure the data collection processing in each channel. After post-production acceptance tests at LHEP the modules are shipped to Fermilab.