Abstract Fraunhofer INT develops systems for on-board radiation sensing. On-board in this context means inside electronic boxes on printed circuit boards (PCB) in close proximity to radiation sensitive electronic devices. The ability to measure dose and/or particle fluxes on the PCB is particularly of interest as this is where radiation hurts the most. In case of intense solar particle events the sudden increase of the measured particle fluxes could be used as an input for adaptive radiation mitigation techniques to protect important electronic parts and systems. Furthermore it can help to reduce radiation design margins for future missions because you get a better knowledge of the received dose inside your electronic box in a given radiation environment. In addition in the case of in-orbit verification or validation missions it is of major importance to verify the reliability of your design against the actual dose received. Our approach is to add as little devices as possible and make use of already installed hardware e.g. microprocessors to operate them, so the output of those sensor devices should already be digital. We propose to integrate additional memory devices for radiation sensing on the PCB: non-volatile UV-EPROMs to measure dose and/or SRAMs to detect high energy (solar) particles. The radiation-induced change of their digital content is a measure for the radiation exposure after calibration in a known radiation field. Fraunhofer On-board Radiation Sensors are already accepted to fly on the German geostationary Heinrich Hertz communication satellite as part of the Fraunhofer On-Board Processor and is foreseen to be implemented on-board of a NanoSat.
Highlights Fraunhofer INT develops systems for on-board radiation sensing. The radiation sensing system is simple, robust, cheap and easy to integrate. The system measures total ionising dose locally inside electronic boxes. In addition it detects solar particle events (SPE). So it can support adaptive mitigation and anomaly investigation.
Fraunhofer satellite radiation sensing systems
Acta Astronautica ; 162 ; 300-305
2019-06-15
6 pages
Article (Journal)
Electronic Resource
English
Space environment , Radiation sensing , Radiation effects , Total ionising dose , Single-event effects , ADC , Analogue-to-digital converter , BRAM , block random access memory , COTS , commercial off-the-shelf , DUT , device under test , FPGA , field programmable gate array , INT , Fraunhofer Institute for Technological Trend Analysis , FOBP , Fraunhofer On-Board Processor , FORS , Fraunhofer On-board Radiation Sensors , GEO , geostationary orbit , H2Sat , Heinrich-Hertz-Satellite , IOV , in-orbit verification or validation , PCB , printed circuit board , SiO<inf>2</inf> , silicon dioxide , SEE , single-event effects , SEL , single-event latch-up , SEU , single-event upset , SPE , solar particle events , SRAM , static random access memory , TID , total ionising dose , UV-EPROM , ultra-violet erasable programmable read-only memory
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