Speaker
Description
The Relativistic Electron and Proton Experiment (REPE) is an advanced, compact particle radiation detector designed for a variety of missions and space weather applications. It was originally developed by University of Turku (UTU) to study the Van Allen belts onboard the nanosatellite mission Foresail-2 and later transitioned into a collaboration with ASRO for future missions. At the moment, REPE development for the HENON (HEliospheric pioNeer for sOlar and interplanetary threats defeNce) space weather mission is in EQM phase, and the flight model will be delivered early 2026. Furthermore, the first commercial customer is using REPE onboard a space weather monitoring constellation. The commercialization project is supported by the ESA ScaleUp Invest programme.
REPE measures electrons in the energy range of 0.25 – 10 MeV and protons from 3 – 100+ MeV using a stack of three silicon detectors and a scintillator with photodiode readout. The design of the stack and collimator allows adaptability for the energy range and geometric factor, making REPE suitable for scientific as well as commercial missions in Low Earth Orbit, High Earth Orbits, and interplanetary space.
In this poster we present the REPE instrument and its scientific performance. We show results from detailed Geant4 simulations of channel response functions, as well as examples of synthetic data generated to represent REPE electron and proton flux measurements during SEP events. The synthetic data are calculated by folding flux spectra measured by other instruments with the response functions of REPE and converting the resulting count rates back to fluxes with the geometric factors of REPE channels.
