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11 September 2018 Design of radiation tolerant FPGAs for the LLNL nanosecond gated CMOS camera program
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Abstract
The Nano-Second Gated CMOS Camera (NSGCC) team at Lawrence Livermore National Laboratory has developed a radiation tolerant camera for Inertial Confinement Fusion (ICF) experiments at NIF with total yields of 10^16 neutrons. To achieve the desired level of operational reliability in a prompt dose environment, several firmware hardening strategies were evaluated, such as redundancy, auto-recovery from single-event upsets (SEU), and remote manual recovery if a SEU causes the system to hang. These approaches work well in a low-dose rate space environment; however, it was not clear how they would perform in a high-dose rate environment. The team generated several exploratory FPGA firmware builds with varying levels of protective circuitry and timing margin, subjected the camera to prompt dose radiation using a 20 ns short pulse x-ray source, and varied the dose. Based on this testing, a hardening strategy to achieve the highest level of radiation tolerance was identified, resulting in an FPGA firmware design that had a high probability of remaining operational in NIF’s radiation environment during a high yield shot.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chris Macaraeg, Matthew Dayton, Brad Funsten, and Arthur Carpenter "Design of radiation tolerant FPGAs for the LLNL nanosecond gated CMOS camera program", Proc. SPIE 10763, Radiation Detectors in Medicine, Industry, and National Security XIX, 107630N (11 September 2018); https://doi.org/10.1117/12.2322694
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