High-rate measurements of the novel BAND-GEM technology for thermal neutron detection at spallation sources

Giorgia Albani,Enrico Perelli Cippo,Gabriele Croci,Andrea Muraro, Richard Hall-Wilton,Carina Höglund,Alain Menelle,Giovanni Grosso,Fabrizio Murtas,Marica Rebai,Linda Robinson,Susann Schmidt,Per-Olof Svensson,Marco Tardocchi,Giuseppe Gorini

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2020）

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摘要

Thermal neutron detection technologies alternative to 3He, featuring a rate capability matching the high flux expected at the European Spallation Source (ESS), are one of the main present challenges of neutron science. A new thermal neutron detection technology was recently developed named the BAND-GEM, a Gas Electron Multiplier (GEM)-based detector provided with a borated 3D converter to reach high efficiency. In this paper the results of a count rate test performed on the BAND-GEM at the ORPHEE reactor are presented. The results show that the detector can easily reach a neutron count rate of 2 MHz/cm2 while maintaining a good linearity and it is able to reach 8 MHz/cm2 with a measurable loss of linearity η and with no sign of instability.

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