Juno will be the first spacecraft to fly over the poles of the planet Jupiter at low altitude. Juno science objectives for the polar magnetosphere include: Investigate the primary auroral processes responsible for particle acceleration, characterize the field-aligned currents that transfer angular momentum from Jupiter to its magnetosphere, identify and characterize auroral radio and plasma wave emissions associated with particle acceleration, and characterize the nature and spatial scale of auroral features.
Juno is ideally suited to determine the auroral distributions of charged particles due to its low altitude passes through the polar region of the planet. For the auroral science, The Jupiter Energetic Particle Detector Instrument (JEDI) will directly measure precipitating fluxes including particles that generate the planetary aurora and particles that heat and ionize the planetary atmosphere. Detailed analysis of the particle spectral and angular characteristics will be used to study acceleration mechanisms. JEDI has the capacity through its electron measurements to determine the magnetic topology of the polar cap region.