Solar Electron Proton Telescope (SEPT)
ESTEC, University of Kiel

SEPT consists of two dual, double-ended magnet/foil solid state detector particle telescopes that cleanly separate and measure electrons in the energy range 20-400 keV and protons from 20-7000 keV, while providing anisotropy information through use of several fields of view. Each SSD detector in SEPT is 300 microns thick and 0.53 cm2 in area. A rare-earth permanent magnet is used to sweep away electrons for ion detection, while a parylene foil transmits electrons but stops protons. SEPT is divided into two pieces for field-of-view reasons. The SEPT-E telescope is housed with the rest of the SEP Package on the body of the spacecraft. It looks in the ecliptic plane along the Parker Spiral magnetic field direction, both forward and backward. SEPT-N/S is housed separately at a different spacecraft location, and looks out of the ecliptic plane perpendicular to the nominal magnetic field, both north and south. The viewing cones for the SEPT telescopes are each ~60 degrees.

More images available on the Multimedia page

SWEA | STE | MAG | SEPT | SIT | LET | HET
Boom Suite | SEP Package