Author/Authors :
Albers، نويسنده , , D. and Bisplinghoff، نويسنده , , J. and Bollmann، نويسنده , , R. and Büكer، نويسنده , , K. and Cloth، نويسنده , , P. and Diehl، نويسنده , , O. and Dohrmann، نويسنده , , F. and Drüke، نويسنده , , V. and Engelhardt، نويسنده , , H.P. and Ernst، نويسنده , , J. and Eversheim، نويسنده , , P.D. and Filges، نويسنده , , D. and Gasthuber، نويسنده , , M. and Gebel، نويسنده , , R. and Greiff، نويسنده , , J. and Groك، نويسنده , , A. and، نويسنده ,
Abstract :
Scintillating fibers of type Bicron BCF-12 with 2 × 2 mm2 cross section, up to 600 mm length, and PMMA cladding have been tested, in conjunction with the multi-channel photomultiplier Hamamatsu R 4760, with minimum ionizing electrons. The impact of cladding, extramural absorbers and/or wrapping on the light attenuation and photoelectron yield is studied in detail. Fibers have been circularly bent with radii of 171 mm and arranged in two layers to bundles forming granulated scintillator rings. Their performance in the EDDA experiment at COSY for detection of high energy protons revealed typically more than 9 (6) photoelectrons per fiber from bundles with (without) mirror on the rear side, guaranteeing detection efficiencies >99% and full compatibility with corresponding solid scintillator rings. The time resolution of 3.4 ns FWHM per fiber read out is essentially due to the R 4760.
