First prototype of the muon telescope

The first prototype telescope was built using available PS scintillator bars, PMTs and bases. A regulable aluminium support was built. The instrumentation was completed with several NIM modules (dual HV power supply, two discriminators and a coincidence module). This two-detector system was mainly used for Atlas TGC studies and characterization (information available in TGC blog).

A simple characterization of the scintillators is available, including light yield and time resolution, compared to our scintillators. There is also a second and final version of this telescope, built using custom made polystyrene scintillator paddles.

Plastic scintillators

15 cm plastic scintillator bars from MINOS/OPERA/AMIGA projects [REF] without fiber optic wavelength shifter.

From AMIGA: The design adopts similar scintillator strips as for the MINOS experiment: 4.1 cm wide x 1.0 cm high strips of extruded polystyrene doped with fluors and co-extruded with TiO2 reflecting coating with a groove in where a wavelength shifter fibre is glued and covered with reflective foil.Scintillator strips are extruded polystyrene doped with fluors: PPO (1%) and POPOP (0:03%). They have a middle groove which lodges a wave length shifter (WLS) fiber: Kuraray Y-11 175 ppm double-clad 1.2 mm diameter which is glued into the groove and covered with reflective foil. The strips are co-extruded with a TiO2 reflective coating which prevents the light from leaving the scintillator.

Detector PMTs and bases

NIM Instrumentation


Related entries in TGC blog
Centellador para la detección de muones
Soporte para los centelladores
Tercer soporte para TGC
Triple coincidencia