29 July 2018 to 4 August 2018
Russian Academy of Sciences
Europe/Moscow timezone

Nanostructured Organosilicon Luminophores as effective wavelength shifters for Cherenkov light and elementary particles detectors

3 Aug 2018, 11:50
25m
Russian Academy of Sciences

Russian Academy of Sciences

Leninsky Prospekt, 32а Moscow 119071 Russian Federation
oral presentation [20+5 min] Technological aspects and applications of Cherenkov detectors Technological aspects and applications of Cherenkov detectors

Speaker

Sergey Ponomarenko (Enikolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences, Moscow, Russia)

Description

We report on recent developments of Nanostructured Organosilicon Luminophores (NOLs) and their application as highly efficient and fast wavelength shifters (WLS) in various types of elementary particles photodetectors. NOL consists of two types of covalently bonded via Si atoms organic luminophores with efficient Förster resonance energy transfer between them. NOLs combine the best properties of organic luminophores and inorganic quantum dots: high absorption cross-section and photoluminescence quantum yield (PLQY), low self-absorption, fast luminescence decay time, good solubility and processability, as well as low toxicity. A variety of organic luminophores allowed us to design and synthesize a library of NOLs, absorbing from 150 to 550 nm and emitting at the desired wavelengths from 390 to 650 nm. The luminescence decay time of NOLs can be as short as 0.8 ns at 90% PLQY.
NOLs were applied as highly efficient vacuum UV WLS for PMT and SiPM used in liquid argon detectors. WLS based on NOL covered on PMT allowed to increase the efficiency of Cherenkov light detection on 15%. Plastic scintillators containing NOLs were 50% more efficient and 40% faster as the standard ones. Fast and efficient NOL-based scintillating fibers (SciFi) emitting in blue and green regions with the decay time of 1.18 – 1.34 ns that is 2-5 times faster than the standard Kuraray SciFi were developed. NOL-containing WLS plates were used for efficient conversion of UV photons into visible light in fast pure CsI scintillators coupled with avalanche photodiodes. That allowed to rise 2-3 times the scintillation light output for upgrade of the end cap electromagnetic calorimeter of Belle II detector.
This work was supported by Federal Agency of Scientific Organizations and made in the framework of leading science school NSh-5698.2018.3.

Primary authors

Dr Oleg Borshchev (Enikolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences, Moscow, Russia) Dr Maxim Skorotetcky (Enikolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences, Moscow, Russia) Bayarto Lubsandorzhiev (Institute for Nuclear Research of the Russian Academy Sciences) Sergey Ponomarenko (Enikolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences, Moscow, Russia)

Presentation Materials

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