Scintillating Optical Fibers for Astroparticle Physics

Physics – Medical Physics

Scientific paper

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Scientific paper

Polystyrene-based scintillating optical fibers are manufactured at Washington University for use in astroparticle physics instruments. A hodoscope of 0.2-mm square-cross-section fibers has been operating on the Cosmic Ray Isotope Spectrometer on the ACE spacecraft at L1 since 1997. A hodoscope of 1-mm fibers operated in a large-area cosmic-ray detector for a total of 50 days on stratospheric balloons over Antarctica. Ribbons of 1-mm fibers are part of the anti-coincidence shield on the Gamma-ray Large Area Space Telescope (GLAST). Laboratory tests of these fibers have demonstrated insensitivity to moderate radiation doses, well understood variation of response with temperature, and attenuation lengths in excess of a meter.

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