Cerium Doped LSO/LYSO Crystal Development for future High Energy Physics Experiments

Ren-Yuan Zhu

关键词: ABSORPTION;    ACCURACY;    CALORIMETERS;    CERIUM;    CRYSTAL GROWTH;    HADRONS;    HARDNESS;    HIGH ENERGY PHYSICS;    NEUTRONS;    PHYSICS;    RADIATIONS;    SCINTILLATIONS;    SEEDS;    STOPPING POWER Crystal;    Scintillator;    Calorimeter;    Lutetium Oxyorthosilicate;    Lutetium Yttrium Oxyorthosilicate;    Transmission;    Photo-Luminescence;    Light Output;    Radiation Damage;   

DOI  :  10.2172/1036961
RP-ID  :  DOE/ER/41427-FINAL
PID  :  OSTI ID: 1036961
Others  :  TRN: US201208%%871

美国|英语

来源: SciTech Connect

【 摘 要 】

Because of their high stopping power and fast and bright scintillation, cerium doped LSO and LYSO crystals have attracted a broad interest in the physics community pursuing precision electromagnetic calorimeter for future high energy physics experiments. Their excellent radiation hardness against gamma-rays, neutrons and charged hadrons also makes them a preferred material for calorimeters to be operated in a severe radiation environment, such as the HL-LHC. An effort was made at SIPAT to grow 25 X{sub 0} (28 cm) long LYSO crystals for high energy physics applications. In this paper, the optical and scintillation properties and its radiation hardness against gamma-ray irradiations up to 1 Mrad are presented for the first 2.5 X 2.5 X 28 cm LYSO sample. An absorption band was found at the seed end of this sample and three other 20 cm long samples, which was traced back to a bad seed crystal used in the corresponding crystal growth process. Significant progresses in optical and scintillation properties were achieved for large size LYSO crystals after eliminating this absorption band.