Validation of Geant4-based dose computational tools with REEF experiments

This paper reports on the experiments carried out using the QinetiQ's REEF (Realistic Electron Exposure Facility) for the validation of computational tools used in space radiation studies. The experiments consist of measuring the dose rate due to the ⁹⁰Sr/⁹⁰Y source after aluminium shields of various thicknesses (0-15 mm), using TLDs and RADFET. The experiments have been modelled in simple 1D geometries using the MULASSIS tool and in detailed 3D geometries with the GRAS tool. Good agreements have been achieved between the measured and simulated data.