Beam test results of the RADEM Engineering Model

Abstract

ESAs next class-L mission to the Jovian system, the Jupiter Icy Moons Explorer (JUICE), will collect valuable data while orbiting Jupiter and three its moons for a period of three and a half years. RADEM, the Radiation Hard Electron Monitor is being developed to provide housekeeping information for the mission. It will also gather valuable scientific data on the energetic radiation environment of the Jovian system for its full duration. The Jovian radiation environment, dominated by electrons, results from Jupiter strong magnetic field and its interaction with the Galilean moons. So far, only the Galileo spacecraft performed long-term measurements of the radiation environment showing that it is extremely hazardous and complex.RADEM features four detector heads: the Proton Detector Head to measure protons energies, the Ion Detector Head to measure ion content up to oxygen; the Electron Detector head to perform electron spectral measurements; and the Directionality Detector Head to correct for electron flux angular dependences. The detectors readout are three newly custom designed ASIC IDE3466. In this work, RADEM overall properties and Engineering Model radiation tests results are presented.