EMBEDDED WAVESHIFTING FIBER READOUT OF LONG SCINTILLATORS

We have tested a novel method of reading out light from long scintilla tors by embedding waveshifting fibers in longitudinal grooves made in the scintillators which are then connected to a photomultiplier (PM). With PMs on both ends of the fibers we have obtained attenuation lengt hs of over 5 m and light outputs of over 5 photo-electrons per MeV fro m both sides of a BC408 scintillator with five 2 mm BCF92 fast green w aveshifting fibers using a Hamamatsu green extended R580-17 PM. With a reflector at one end of the fibers, we have easily obtained over 10 m attenuation lengths. Also presented are first results using inexpensi ve acrylic scintillators with this method.