IMAGING OF RADIATION DETECTORS PROPERTIES BY IBIC

Ion Beam Induced Charge (IBIC) technique was used for imaging differen t properties of several radiation detectors. Small lateral dispersion of 3-5 MeV proton microbeam allowed us to investigate a scanned detect or as an array of independent charge sensitive detectors. The detector response function at each point was separately analyzed. The mean and the median detected proton energy, as well as standard deviation, was calculated and connected to the local value of the detector collectio n efficiency and resolution. The progressive change (increase or decre ase) of the collection efficiency with the time was studied. IBIC was also applied for imaging the incomplete charge collection layer in Si( Li) X-ray detectors. (C) 1997 Elsevier Science B.V.