Electronics for space systems
DAPNIA is also developing electronic functions that are crucial for the implementation of innovative detection systems for scientific space instrumentation. These detection systems meet the diverse requirements of the various scientific subjects and cover the entire electromagnetic spectrum, from gamma, X, visible and infrared rays to submillimetric waves. Operating such detectors often requires using cryogenic devices and developing the associated electronics.
Developments conducted at DAPNIA as part of the HERSCHEL mission are a perfect illustration of these requirements. For example, the SPIRE instrument, an electronic unit including 350 ultra-low noise (a few nV/Hz1/2) channels and with a large dynamic range (20 bits) was designed in collaboration with the Jet Propulsion Laboratory, responsible for bolometer manufacturing. In the context of the PACS instrument, an analogical electronic system was developed to operate bolometer matrices produced by CEA/LETI. Apart from the 160 analogical processing channels, it includes polarization functions for the detector and the cryogenic system. Temperature measurements (10 µK resolution at 300 mK) were the subject of developments in collaboration with the low temperature department at DSM/DRFMC (Grenoble). To ensure effective communication between this unit and the rest of the instrument, an interface was integrated onto the ESA SpaceWire standard by DAPNIA and distributed in the PACS consortium. The electromagnetic compatibility of these units was validated in DAPNIA before final delivery.
Finally, DAPNIA teams are involved in new projects, such as the design and production of the scientific processing unit on the ECLAIRs satellite and for the high energy g-ray camera on the SIMBOL-X satellite.