Embedded waveshifting fiber readout of long scintillators

Abstract

A method was tested for reading out light from long scintillators 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, attenuation lengths of over 5 m and light outputs of over 5 photoelectrons per MeV, were obtained from both sides of a BC 408 scintillator with five 2-mm BCF 92 fast green waveshifting fibers using a Hamamatsu green extended R 580-17 PM. With a reflector at one end of the fibers, attenuation lengths of over 10 ms were obtained. First results using inexpensive acrylic scintillators with this method are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>