3D Energetic Electron Spectrometer (3DEES)
The 3DEES instrument is a space radiation spectrometer designed to measure energetic electron (and optionally proton) spectra within the 0.1 – 10 MeV range in 32 energy bins and 3D angular distribution (at least 6 angles distributed within 2 planes) with a resolution for each looking direction better than 20°. The 3DEES concept is based on various charged particle detection principles including ΔE-E telescope principle, the inclined sensor concept. Protons and ions are detected by the instrument and are so cleanly identified that they cannot contaminate the electron spectra.
The 3DEES instrument is composed of 1 – 3 Panoramic Spectrometer Modules (PSM), each of which is composed of a Docking Module (DM) to which 2 – 3 Orthogonal Sensor Modules (OSM) are electronically connected.