Development of LuAG:Ce Ceramic Fibers for the RADiCAL Detector Concept

HEP experiments at future hadron colliders require fast and radiation hard calorimetry. An ultra-compact RADiCAL electromagnetic calorimeter concept with radiation hard LYSO:Ce crystals as active material and LuAG:Ce ceramic fibers as wavelength shifter is under development. In this paper we report characterization of LuAG:Ce ceramic fibers of various diameter. Their photoluminescence spectra and longitudinal uniformity were measured and compared to quartz capillary wavelength shifters. Their application in a RADiCAL cell will also be discussed.