Abstract
A 20-layer MRPC with 20 layers of 160μm thickness of Pb converters is fabricated. The resistive plates of the MRPC are 145 ± 15μm borosilicate (D 263 M) glasses, which are separated by three layers of 50μm Kapton tape to create a 150μm gas gap. The experimental detection efficiency of fabricated 20-layer MRPC with 160μm thickness of Pb converter and Ar–CO2 (70:30) gas mixture, for 662 keV gammas at 1400 V applied voltage is around 6.07%. The experimental detection efficiency of the 20-layer MRPC with Pb converter (6.07%) with a relative error around 9.2% is in good agreement with the simulation result (∼6.63%). For the 20-layer MRPC with Pb converter, the experimental detection efficiency is around 17.3 times higher than the simulated results for a single RPC layer. The experimental results for 20-layer MRPC with Pb and Cu converters with reduced high voltage configuration show that the detection efficiency of MRPC with Pb converter is around 10% greater than the one with Cu converter.
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