Detector cells consisting of fast lead-tungstate crystals viewed by avalanche photo-diodes were designed, built and bench-tested. It was found that cooling the crystals to -20 C, using two avalanche photo-diodes per crystal, and using fast pulse shaping provided the light yield, low noise, and fast response needed for use in 100 MeV calorimetry at high beam rates. The achieved stochastic term coefficient is 0.8% and the time response is characterized by a single decay term of 24 ns.
- Scintillators and scintillating fibres and light guides
ASJC Scopus subject areas
- Mathematical Physics