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Simulation-based optimization of a multilayer 10B-RPC thermal neutron detector

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arxiv 2002.02284 v2 pith:36OFJEWV submitted 2020-02-06 physics.ins-det

classification physics.ins-det
keywords detectorneutronratethermalb-rpccountingmultilayeroptimization
verification ladder T0 review T1 audit T2 compute T3 formal
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A Monte Carlo simulation-based optimization of a multilayer 10B-RPC thermal neutron detector is performed targeting an increase in the counting rate capability while maintaining high (>50%) detection efficiency for thermal neutrons. The converter layer thicknesses of individual RPCs are optimized for several configurations of a detector containing a stack of 10 double gap RPCs. The results suggest that it is possible to reach a counting rate which is by a factor of eight higher in comparison to the rate of a detector with only one double-gap RPC. The effect of neutron scattering inside the detector contributing to the background is analyzed and design modifications of the first detector prototype, tested at neutron beam, are suggested.

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