A fiber detector radiation hardness test

An intense 146 MeV/c pion beam was stopped inside a scintillating fiber det ector made out of 12 planes with 16 pixels each, where every pixel consists of 8x8 densely packed scintillating fibers of 500 mu m diameter. The detec tor was irradiated for 52 h to more than 10 kGy at its center. Before and d irectly after the irradiation the detector had been exposed to a particle b eam to compare the corresponding light output. This study was continued dur ing the following three months using cosmic rays. No damage was found takin g into account the measurement errors of 5-10%. A 9 cm deep lucite degrader became irreversibly non-transparent in the irradiation region. (C) 2000 El sevier Science B.V. All rights reserved.