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1.
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Transient optical absorption technique to test timing properties of LYSO:Ce scintillators for the CMS Barrel Timing Layer
/ Tamulaitis, G. (Vilnius U.) ; Nargelas, S. (Vilnius U.) ; Talochka, Y. (Vilnius U.) ; Vaitkevičius, A. (Vilnius U.) ; Korjik, M. (Belarus State U.) ; Mechinsky, V. (Belarus State U.) ; Paramatti, R. (INFN, Rome ; Rome U., Sapienza) ; Dafinei, I. (INFN, Rome ; Rome U., Sapienza) ; Lucchini, M.T. (INFN, Milan-Bicocca ; Milan-Bicocca U.) ; Auffray, E. (CERN) et al.
A novel technique for testing the timing properties of scintillators is presented. The technique is based on transient absorption (TA) induced in a scintillating material by a selective excitation of the activator ion. [...]
2023 - 8 p.
- Published in : Radiat. Phys. Chem. 206 (2023) 110792
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2.
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Compositional engineering of multicomponent garnet scintillators: towards an ultra-accelerated scintillation response
/ Martinazzoli, Loris (CERN ; Milan Bicocca U. ; INFN, Milan Bicocca) ; Nargelas, Saulius (Vilnius, Inst. Theor. Phys. Astron.) ; Boháček, Pavel (Prague, Inst. Phys.) ; Calá, Roberto (CERN ; Milan Bicocca U. ; INFN, Milan Bicocca) ; Dušek, Michal (Prague, Inst. Phys.) ; Rohlíček, Jan (Prague, Inst. Phys.) ; Tamulaitis, Gintautas (Vilnius, Inst. Theor. Phys. Astron.) ; Auffray, Etiennette (CERN) ; Nikl, Martin (Prague, Inst. Phys.)
Optical, luminescence and scintillation characteristics were studied in garnet-type GAGG single-crystal scintillators grown by the Czochralski method and heavily doped with a cerium activator and a magnesium codopant at different concentrations. Emission quenching due to the formation of closely spaced Ce–Mg pairs accelerating the photoluminescence and scintillation decays down to a few nanoseconds and substantial suppression of slower decay components are observed. [...]
2022 - 11 p.
- Published in : Materials Advances 3 (2022) 6842-6852
Fulltext: PDF;
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3.
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Irradiation effects on Gd3AI3Ga3O12 scintillators prospective for application in harsh irradiation environments
/ Auffray, E (CERN) ; Dosovitskiy, G (Kurchatov Inst., Moscow) ; Fedorov, A (BSU, Minsk ; Kurchatov Inst., Moscow) ; Guz, I (Kurchatov Inst., Moscow) ; Korjik, M (BSU, Minsk) ; Kratochwill, N (CERN) ; Lucchini, M (Princeton U.) ; Nargelas, S (Vilnius U.) ; Kozlov, D (BSU, Minsk) ; Mechinsky, V (BSU, Minsk ; Kurchatov Inst., Moscow) et al.
We provide evidences that multicomponent garnet-type Ce-doped crystal GAGG (Gd3AI3Ga3O12) is a promising
scintillator to be applied in harsh irradiation environments, particularly, in high-energy physics experiments and
reactor research facilities, where long-term operation is mandatory. Applicability of this scintillator for the
upgrade of the detectors at future accelerators with high luminosity like High luminosity LHC is considered and
GAGG:Ce with different codopings is compared with Ce-doped oxyorthosilicate crystals, which are currently also
strong candidates for such applications. [...]
2019
- Published in : Radiat. Phys. Chem. 164 (2019) 108365
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4.
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Improvement of the timing properties of Ce-doped oxyorthosilicate LYSO scintillating crystals
/ Tamulaitis, G (Vilnius U.) ; Auffray, E (CERN) ; Gola, A (Fond. Bruno Kessler, Povo) ; Korzhik, M (Minsk, Inst. Nucl. Problems) ; Mazzi, A (Fond. Bruno Kessler, Povo) ; Mechinski, V (Minsk, Inst. Nucl. Problems) ; Nargelas, S (Vilnius U.) ; Talochka, Y (Minsk, Inst. Nucl. Problems) ; Vaitkevičius, A (Vilnius U.) ; Vasil'ev, A (Moscow State U.)
The aim of this work has been to improve the time resolution of radiation detectors for future high-energy physics experiments and medical imaging applications. Cedoped oxyorthosilicate Lu2SiO5:Ce (LSO) and mixed oxyorthosilicate Lu1.6Y0.4SiO5:Ce (LYSO) have been investigated as prospective scintillators for such high-timeresolution applications. [...]
2020
- Published in : J. Phys. Chem. Solids 139 (2020) 109356
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5.
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Multipurpose Ce-doped Ba-Gd silica glass scintillator for radiation measurements
/ Dormenev, V (U. Giessen, II. Phys. Inst.) ; Amelina, A (Kurchatov Inst., Moscow) ; Auffray, E (CERN) ; Brinkmann, K -T (U. Giessen, II. Phys. Inst.) ; Dosovitskiy, G (Kurchatov Inst., Moscow) ; Cova, F (Milan Bicocca U.) ; Fedorov, A (Kurchatov Inst., Moscow) ; Gundacker, S (CERN) ; Kazlou, D (Belarus State U., Minsk (main)) ; Korjik, M (Kurchatov Inst., Moscow ; Belarus State U., Minsk (main)) et al.
A new inorganic scintillation material based on Ba-Gd silica glass doped with cerium (BGS) is fabricated and studied. With the highest light yield among heavy glasses at the level of 2500 ph/MeV and fast scintillation response, the new scintillator ensures a good coincidence time resolution of < 230 ps FWHM for 511 keV
γ
-quanta from a 22Na source and SiPM readout. [...]
2021 - 10 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1015 (2021) 165762
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6.
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Test beam characterization of sensor prototypes for the CMS Barrel MIP Timing Detector
/ CMS MTD Collaboration
The MIP Timing Detector will provide additional timing capabilities for detection of minimum ionizing particles (MIPs) at CMS during the High Luminosity LHC era, improving event reconstruction and pileup rejection. The central portion of the detector, the Barrel Timing Layer (BTL), will be instrumented with LYSO:Ce crystals and Silicon Photomultipliers (SiPMs) providing a time resolution of about 30 ps at the beginning of operation, and degrading to 50-60 ps at the end of the detector lifetime as a result of radiation damage. [...]
arXiv:2104.07786.-
2021-07-15 - 28 p.
- Published in : JINST 16 (2021) P07023
Fulltext: 2104.07786 - PDF; document - HTM; fermilab-pub-21-423-cms - PDF; Fulltext from publisher: PDF; External link: Fermilab Accepted Manuscript
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7.
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Transient Phenomena in Scintillation Materials
/ Tamulaitis, G (Vilnius U.) ; Nargelas, S (Vilnius U.) ; Vaitkevičius, A (Vilnius U.) ; Lucchini, M (CERN) ; Auffray, E (CERN) ; Fedorov, A (Belarus State U.) ; Mechinsky, V (Belarus State U.) ; Korjik, M (Belarus State U.)
Time resolution becomes an increasingly important property of the scintillators to be exploited in radiation detectors for coming high-luminosity high-energy physics experiments and medical imaging applications. Multicomponent scintillators enable purposeful design of scintillation properties and, consequently, are attractive for fast radiation detection but suffer for the emission delay due to trapping of nonequilibrium carriers. [...]
2019 - 10 p.
- Published in : Springer Proc. Phys. 227 (2019) 19-28
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8.
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Measurement of non-equilibrium carriers dynamics in Ce-doped YAG, LuAG and GAGG crystals with and without Mg-codoping
/ Lucchini, M T ; Buganov, O ; Auffray, E (CERN) ; Bohacek, P ; Korjik, M ; Kozlov, D ; Nargelas, S ; Nikl, M ; Tikhomirov, S ; Tamulaitis, G et al.
Non-linear absorption spectroscopy in pump and probe configuration has been used to test the population of non-equilibrium carriers in Ce-doped Y3Al5O_12 (YAG), Lu3Al5O12 (LuAG), and Gd3AlxGa(5-x)O12 (GAGG) crystals with and without codoping by Mg2+ ions. A faster rise time of the induced optical density has been observed in all crystals codoped with Mg with respect to that in Mg-free samples. [...]
10.1016/j.jlumin.2017.10.005.-
2018 - 7 p.
- Published in : J. Lumin. 194 (2018) 1-7
Fulltext: PDF;
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9.
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Subpicosecond luminescence rise time in magnesium codoped GAGG:Ce scintillator
/ Tamulaitis, G (Vilnius U.) ; Vaitkevičius, A (Vilnius U.) ; Nargelas, S (Vilnius U.) ; Augulis, R (FTMC, Vilnius) ; Gulbinas, V (FTMC, Vilnius) ; Bohacek, P (Prague, Inst. Phys.) ; Nikl, M (Prague, Inst. Phys.) ; Borisevich, A (Minsk, Inst. Nucl. Problems) ; Fedorov, A (Minsk, Inst. Nucl. Problems) ; Korjik, M (Minsk, Inst. Nucl. Problems) et al.
The influence of co-doping of Gd3Al2GA3O12:Ce (GAGG:Ce) scintillator with magnesium on the rise time of luminescence response was studied in two GAGG:Ce crystals grown in nominally identical conditions except of Mg co-doping in one of them. Time-resolved photoluminescence spectroscopy and free carrier absorption techniques were exploited. [...]
10.1016/j.nima.2017.07.015.-
2017 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 870 (2017) 25-29
Fulltext: PDF;
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10.
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Non-Linear Optical Phenomena in Detecting Materials as a Possibility for Fast Timing in Detectors of Ionizing Radiation
/ Korjik, M. V. (Minsk, Inst. Nucl. Problems) ; Auffray, E. (CERN) ; Buganov, O. (Minsk, Inst. Phys.) ; Fedorov, A. A. (Minsk, Inst. Nucl. Problems) ; Emelianchik, I. (Minsk, Inst. Nucl. Problems) ; Griesmayer, E. (TU Vienna) ; Mechinsky, V. (Minsk, Inst. Nucl. Problems) ; Nargelas, S. (Vilnius U.) ; Sidletskiy, O. (Inst. Scintill. Mat., Kharkiv) ; Tamulaitis, G. (Vilnius U.) et al.
The time resolution of the detectors currently in use is limited by 50-70 ps due to the spontaneous processes involved in the development of the response signal, which forms after the relaxation of carriers generated during the interaction. In this study, we investigate the feasibility of exploiting sub-picosecond phenomena occurring after the interaction of scintillator material with ionizing radiation by probing the material with ultra-short laser pulses. [...]
10.1109/TNS.2016.2617461.-
2016
- Published in : IEEE Trans. Nucl. Sci. 63 (2016) 2979-2984
IEEE Open Access article: PDF;
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