RADIATION-INDUCED EFFECTS ON LEAD AND SCINTILLATING-FIBER CALORIMETERS AT THE LHC

A radiation hardness study of full length (2 m), lead and scintillatin g fiber calorimeter test modules is reported. The 0.5 GeV LEP Injector Linac (LIL) is used as a radiation source. Test modules, containing a number of different fiber types, are subjected to various dose levels and rates in order to observe light loss and annealing effects. Damag e assessment shows the importance of irradiation of complete test modu les. Loss in fiber light output during irradiation is reported. Irradi ated modules are subsequently probed using a CERN PS, 5 GeV electron b eam at various times after irradiation. Integrated light attenuation a nd damage profiles are measured. Performances of a lead/scintillating fiber calorimeter after radiation damage equivalent to four years runn ing at LHC at rapidity two and radius less than 2 m from the interacti on point are predicted.