Irradiation studies of a multi-doped Gd3Al2Ga3O12 scintillator

被引：31

作者：

Alenkov, V ^{[1
]}

Buzanov, O. ^{[1
]}

Dosovitskiy, G. ^{[2
]}

Egorychev, V ^{[3
]}

Fedorov, A. ^{[4
]}

Golutvin, A. ^{[5
,6
]}

Guz, Yu ^{[7
]}

Jacobsson, R. ^{[8
]}

Korjik, M. ^{[2
,4
]}

Kozlov, D. ^{[4
]}

Mechinsky, V ^{[4
]}

Schopper, A. ^{[8
]}

Semennikov, A. ^{[3
]}

Shatalov, P. ^{[3
]}

Shmanin, E. ^{[5
]}

机构：

[1] FOMOS Crystals, Moscow, Russia

[2] NRC Kurchatov Inst, Moscow, Russia

[3] NRC Kurchatov Inst, Inst Theoret & Expt Phys, Moscow, Russia

[4] Belarusian State Univ, Inst Nucl Problems, Minsk, BELARUS

[5] NUST MISIS, Moscow, Russia

[6] Imperial Coll London, London, England

[7] NRC Kurchatov Inst, Inst High Energy Phys, Protvino, Russia

[8] CERN, Geneva, Switzerland

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2019年 / 916卷

关键词：

Electromagnetic calorimetry; Scintillation crystal; Gadolinium-aluminum-gallium garnet; Radiation damage; Optical transmission; PROTON-INDUCED DAMAGE; HIGH-ENERGY; CALORIMETER; PERFORMANCE;

D O I：

10.1016/j.nima.2018.11.101

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The characteristics of a Gd3Al2Ga3O12 crystal scintillator doped with cerium and co-doped with magnesium and titanium have been studied, mainly in view of using it for the Phase II upgrade of the LHCb electromagnetic calorimeter. Samples of the scintillator were irradiated with gamma (Co-60) to 2 kGy and with 24 GeV protons to 900 kGy. The proton fluence value was similar to 3 . 10(15)cm(-2). It was found that gamma-irradiation did not produce any change in the optical transmission of the crystals in the spectral range of the scintillation light, whereas a degradation after the proton irradiation was measurable. For the 1 cm thick sample, a loss of transmission of 3.6% was measured at the wavelength of maximum scintillation (520 nm), and the measured induced absorption coefficient at this wavelength was similar to 3.6 m(-1). The formation of radioisotopes in the crystal at proton irradiation has been analysed. The formation of isotopes was also simulated with the help of the FLUKA package. The simulation was found to be in a good agreement with experimental results. The results have been used to estimate the expected intensity of parasitic radio-luminescence at high-luminosity operation in a GAGG/W sampling electromagnetic calorimeter.

引用

页码：226 / 229

页数：4

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