Over the last four decades Ren-Yuan Zhu and his colleagues have been involved in the successful development of inorganic scintillating crystals for precision crystal electromagnetic calorimeters in high energy physics, such as the L3 BGO, BaBar CsI(Tl), CMS PWO and Mu2e CsI. Several Advanced Detector Research awards and Collider Detector Research and Development awards were received from the DOE Science Office for the developments of PWO, LSO/LYSO and other cost-effective crystals for future HEP experiments. In 2009, Ren-Yuan established this task in the Caltech HEP program with a main goal of developing inorganic scintillator-based novel detector concepts, such as a ultraradiation hard calorimeter concept, a ultrafast calorimeter concept, and a cost-effective homogeneous hadronic calorimeter concept. Emphasis of this program is devoted to the development of several novel inorganic scintillators, such as LuAG scintillating ceramics featured with excellent radiation hardness, yttrium doped-barium fluoride crystals featured with a sub-ns FWHM pulse width and a greatly suppressed slow scintillation component, and cost-effective inorganic scintillators for the homogeneous hadronic calorimeter concept. This task is supported by the U.S. Department of Energy, Office of High Energy Physics program under Award Number DE-SC0011925.
