University of Delaware
Measurement of Low-energy Cosmic-Ray Electron and Positron Spectra with the AESOP-Lite balloon-borne Spectrometer
A new measurement of the Cosmic-Ray Electron and Positron spectra in the energy range of 20 MeV–1 GeV will be presented. The data were taken during the first flight of the balloon-borne spectrometer Anti Electron Sub-Orbital Payload (AESOP-Lite), which was flown from Esrange, Sweden, to Ellesmere Island, Canada, in May 2018. The payload collected over 130hrs of exposure at an average altitude of 3g/cm^2. The instrument incorporates a gas Cerenkov detector and a magnetic spectrometer to identify particle type and measure the energy. The primary CR spectra of electrons and positrons, as well as the re-entrant albedo fluxes, were extracted between 20 MeV and 1 GeV.