Development of a fast simulator for GEM-based neutron detectors

TL;DR

This paper introduces a fast simulation approach for GEM-based neutron detectors using Geant4 and Garfield++, enabling efficient performance evaluation and optimization of these detectors.

Contribution

A novel combined simulation strategy that significantly reduces computation time for modeling GEM-based neutron detectors with 10B layers.

Findings

The new simulator is validated against experimental data.

It achieves faster simulation times compared to traditional methods.

Initial results demonstrate reliable performance predictions.

Abstract

Gas Electron Multiplier (GEM)-based detectors using a layer of 10B as a neutron converter is becoming popular for thermal neutron detection. A common strategy to simulate this kind of detector is based on two frameworks: Geant4 and Garfield++. The first one provides the simulation of the nuclear interaction between neutrons and the 10B layer, while the second allows the simulation of the interaction of the reaction products with the detector gas leading to the ionization and excitation of the gas molecules. Given the high ionizing power of these nuclear reaction products, a full simulation is very time consuming and must be optimized to become viable. In this work, we present a strategy to develop a fast simulator based on these two frameworks that will allow us to generate enough data for a proper evaluation of the expected performance and optimization of this kind of detector. We will show the first results obtained with this tool concentrating on its validation and performance.