Energetic Particle Detector
The EPD draws from UCLA's particle detector experience with the OGO series and recent experience
from the Solid State Telescope (SST) instruments launched aboard the THEMIS constellation in 2007.
Instrument Lead: V. Angelopoulos, email@example.com
The electron sensor contains a stack of eight 1000micrometers and two 500micrometers-thick
solid-state Si detectors. An aluminized Lexan foil in front of the stack stops protons up to 500 keV and provides a light-tight environment.
The ion sensor contains two 1000micrometers-thick detectors and a samarium cobalt magnetic deflector to filter out low energy electrons.
The front detector measures ion flux > 50keV. The 2nd detector implements anti-coincidence logic to disregard higher energy electrons that are not magnetically deflected.
Instrument Processing Unit
The IPU, positioned on top of the EPD sensors, provides command and data handling, compression, packetization, and redundant storage on
non-voltatile flash memory for both the EPD and UCLA's PRM Triaxial Fluxgate Magnetometer.
The mass, dimensions, power consumption, and data colume of the EPD are tailored for use aboardnanosatellites, including CubeSats.
Two sensors to differentiate electron and ion populations
Electron range: 50keV to 4Mev
Ion range: 50keV to 500keV
Aluminum and Tantalumshielding: Usable in radiation belt
dE/E < 50%
The mass is < 1.5kg including 1.2cm-thick Al+Ta wall detector vault but no cover
Small module size 85 x 80 x 80 mm
Wide operating tempareture range ± 50 oC.