Background and muon counting rates in underground muon measurements with a plastic scintillator counter based on a wavelength shifting fibre and a multi-pixel avalanche photodiode readout

Vladimir Volchenko 1 , Evgeniy Akhrameev 1 , Leonid Bezrukov 1 , Irina Dzaparova 1 , Irakliy Davitashvili 1 , Timo Enqvist 2 , Hans Fynbo 4 , Zhamal Guliev 1 , Lev Inzhechik 1 , Alexander Izmaylov 1 , Jari Joutsenvaara 2 , Marat Khabibullin 1 , Alexey Khotjantsev 1 , Yuri Kudenko 1 , Pasi Kuusiniemi 2 , Bayarto Lubsandorzhiev 1 , Nima Lubsandorzhiev 1 , Oleg Mineev 1 , Lauri Olanterä 2 , Valeriy Petkov 1 , Roman Poleshuk 1 , Tomi Räihä 2 , Bator Shaibonov 1 , Juho Sarkamo 2 , Alexey Shaykhiev 1 , Wladyslaw Trzaska 3 , Galina Volchenko 1 , Alexey Yanin 1  and Nikolay Yershov 1
  • 1 Institute for Nuclear Research of RAS, Moscow, Russia
  • 2 CUPP/Pyhäsalmi, University of Oulu, Oulu, Finland
  • 3 Department of Physics, University of Jyväskylä, Jyväskylä, Finland
  • 4 Department of Physics and Astronomy, University of Århus, Århus, Denmark

Abstract

In this short note we present results of background measurements carried out with polystyrene based cast plastic 12.0×12.0×3.0 cm3 size scintillator counter with a wavelength shifting fibre and a multi-pixel Geiger mode avalanche photodiode readout in the Baksan underground laboratory at a depth of 200 metres of water equivalent. The total counting rate of the scintillator counter measured at this depth and at a threshold corresponding to ∼0.37 of a minimum ionizing particle is approximately 1.3 Hz.

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