Radiation hardness studies of KURARAY SCSF-78M scintillating fibers and clearfibers from KURARAY and pol.hi.tech. performed under different dose rateconditions in proton and electron beams are summarized. For high dose ratesin-situ measurements of the fiber light output were done. During several monthsafter irradiation all fibers were measured concerning light emission andtransparency. Fibers irradiated at high rates to about 1 Mrad are clearly damaged butrecover within a few hours up to several weeks. Using smaller rates up to thesame integral dose a decrease of the light output of scintillating fibers of upto 30% can not be excluded. Clear fibers seem to be uneffected up to 400 krad.No significant influence of fiber coverage and atmosphere during irradiationwas found.
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