Abstract
The large scale use of scintillating optical fibers in particle detectors is now starting, with the advent of lead-scintillating fiber calorimeters and their use in physics experiments. With respect to the use of scintillating fibers for the tracking of particle trajectories close to the interacting point, in this application we face very massive detectors and a very large quantity of scintillating fibers. On the other hand, their diameter does not need to be particularly small, as in the case of particle tracking when a good space resolution is required. The CHORUS Collaboration is presently building a new detector for the search of ν μ − ν τ oscillations on the CERN neutrino beam. A crucial task in the detector is ruled by the high energy resolution calorimeter. For its construction more than 400 000 scintillating plastic fibers have been used. Here we report on the characteristics and performance of a new instrument for high statistics measurement of the fiber properties in terms of light output and attenuation length of the light.
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