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Double-GEM based thermal neutron detector prototype
2022 - SERRA FILHO, L.A.; FELIX DOS SANTOS, R.; SOUZA, G.G.A. de; PAULINO, M.M.M.; SOUZA, F.A.; MORALLES, M.; LUZ, H.N. da; BREGANT, M.; MUNHOZ, M.G.; LAI, C.-C.; HOGLUND, C.; SVENSSON, P.-O.; ROBINSON, L.; HALL-WILTON, R.
The Helium-3 shortage and the growing interest in neutron science constitute a driving factor in developing new neutron detection technologies. In this work, we report the development of a double-GEM detector prototype that uses a 10B4C layer as a neutron converter material. GEANT4 simulations were performed predicting an efficiency of (3.14 ± 0.10)%, agreeing within 2.7σ with the experimental and analytic detection efficiencies obtained by the detector when tested in a 41.8 meV thermal neutron beam. The detector is position sensitive, equipped with a 256+256 strip readout connected to resistive chains, and achieves a spatial resolution better than 3 mm. The gain stability over time was also measured with a fluctuation of about 0.2% h-1 of the signal amplitude. A simple data acquisition with only 5 electronic channels is sufficient to operate this detector.