Double-GEM based thermal neutron detector prototype

Abstract

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 ${}^{10}$B${}_4$C layer as a neutron converter material. GEANT4 simulations were performed predicting an efficiency of 3.14(10) %, agreeing within 2.7 $\sigma$ 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.

Prepared for submission to JINST

References in corpus (3)

• First beams at Neutrons For Science
• Study of charging-up effect for a single mask triple GEM detector
• XRF element localization with a triple GEM detector using resistive charge division