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Information × Registration Number 0225U001824, (0124U001565) , R & D reports Title Looking for ways to obtain scintillators based on crystal grains of tungstates for the GRAiNITA project. popup.stage_title Пошук шляхів одержання сцинтиляторів на основі кристалічних зерен вольфраматів для проекту GRAiNITA. Head Tupitsyna Iryna A., Кандидат технічних наук Registration Date 08-02-2025 Organization Institute for Scintillation Materials of National Academy of Science of Ukraine popup.description1 Looking for methods to obtain the tungstate grains of divalent metals of a hihg quality by their optical and scintillation properties and an optical binder for a composite scintillator based on tungstate grains for the GRAiNITA project. popup.description2 Modern research methods in high-energy physics require more and more sensitive detector systems, which will allow reliable recording of events associated with the collision of elementary particle beams in the future. The sensitivity of detector systems primarily depends on the parameters of the sensor elements, which are scintillation crystals. GRAiNITA is a next-generation calorimeter with a very high photon energy resolution for use in the FCC e+e- (CERN) experiments. The idea behind GRAiNITA is to replace successive layers of conventional bulk single crystal scintillator and absorber materials with submillimeter and millimeter grains of inorganic crystals with high Z and density. In such a detector, the scintillation light remains stochastically confined in the zone of origin and is collected in the photodetector by means of spectrally shifted light guide fibers running along the entire volume of the detector. The project has developed new technological approaches to create high-quality scintillation single crystal grains of ZnWO4 and CaWO4 by spontaneous crystallization in flux. For this purpose, the raw material was selected, which ensured the absence of color centers, and the charge was obtained by solid-phase synthesis; the compound Na2WO4 was chosen as a flux, which ensured the yield of a monophasic product of at least 80% by weight of the charge; the growth conditions were found, which made it possible to control the size of single crystal grains; comprehensive studies of the characteristics of the obtained scintillation materials were carried out; the composition of high-density optical lead glass for a composite scintillator based on tungsten grains was selected. Experimental batches of single crystal scintillation grains of ZnWO4 and CaWO4 were obtained and mini-prototypes of the GRAiNITA detector based on them were manufactured at the University of Paris-Saclay (France). Product Description popup.authors Halkin Serhii M. Dubovyk Oleksandr M. Zavora Liudmyla M. Lalaiants Oleksandr I. Plakhota Andrii K. Rybalka Iryna A. Sosnytska Olha O. Tupitsyna Iryna A. Shtykh Ihor O. popup.nrat_date 2025-02-08 Close