Liquid scintillator composition optimization for use in ultra-high energy cosmic ray detector systems

Dmitriy Beznosko, Ayan Batyrkhanov, Alexander Iakovlev, Khalykbek Yelshibekov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The Horizon-T (HT) detector system and the currently under R&D HT-KZdetector system are designed for the detection of Extensive Air Showers(EAS) with energies above ˜10^16 eV(˜10^17 eV for HT-KZ). The main challenges in bothdetector systems are the fast time resolutions needed for studying thetemporary structure of EAS, and the extremely wide dynamic range neededto study the spatial distribution of charged particles in EAS disks. Inorder to detect the low-density of charged particles far from the EASaxis, a large-area detector is needed. Liquid scintillator with low costwould be a possible solution for such a detector, including the recentlydeveloped safe and low-cost water-based liquid scintillators. Liquidorganic scintillators give a fast and high light yield (LY) for chargedparticle detection. It is similar to plastic scintillator in propertiesbut is cost effective for large volumes. With liquid scintillator, onecan create detection volumes that are symmetric and yet retain high LYdetection. Different wavelength shifters affect the scintillation lightby changing the output spectrum into the best detection region. Resultsof the latest studies of the components optimization in the liquidscintillator formulae are presented.

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