Study on the factors influencing the output response of LYSO:Ce electron radiation detector

Abstract

BackgroundThe total dose effect of ionization on satellites in Geostationary Earth Orbit (GEO) is caused by space particle radiation in GEO.PurposeThis study aims to combine high-performance cerium-doped yttrium-lutetium silicate (LYSO:Ce) crystals with an aluminum layer to shield the effect of proton irradiation for effective electron radiation dose detection.MethodsFirstly, the detector model was established using Geant4, the shielding effects of different materials for LYSO:Ce detector were compared. Then, the response characteristics of the detector were analyzed, and the factors affecting the output response of the detector at different shielding layer thicknesses were investigated.ResultsThe results showed that the effect of proton irradiation can be eliminated by using 0.022 mm aluminum as the shielding layer. The LYSO:Ce crystal-based detector has a good linear response, and the secondary electrons and photons generated when electrons pass through the shield improve the response sensitivity of the detector. The ionization stopping power of the electron is approximately inversely proportional to the square of the incident electron velocity, and the detector response to radiation is enhanced when the transmission distance between the electron and the detector was appropriately increased. The highest electron detection efficiency of the detector occurs in the energy range of 0.04~1 MeV.ConclusionsThis study on the characteristics of electron radiation dose detector on the basis of LYSO:Ce crystals combined with an aluminum layer provides a technical reference and theoretical support for designing new scintillator space radiation detectors.

Keywords

• lyso:ce
• geant4
• electronic radiation
• dose detector