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Proceedings Paper

Design of radiation tolerant FPGAs for the LLNL nanosecond gated CMOS camera program
Author(s): Chris Macaraeg; Matthew Dayton; Brad Funsten; Arthur Carpenter
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Paper 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.

Paper Details

Date Published: 11 September 2018
PDF: 13 pages
Proc. SPIE 10763, Radiation Detectors in Medicine, Industry, and National Security XIX, 107630N (11 September 2018); doi: 10.1117/12.2322694
Show Author Affiliations
Chris Macaraeg, Lawrence Livermore National Lab. (United States)
Matthew Dayton, Lawrence Livermore National Lab. (United States)
Brad Funsten, Lawrence Livermore National Lab. (United States)
Arthur Carpenter, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 10763:
Radiation Detectors in Medicine, Industry, and National Security XIX
Gary P. Grim; Lars R. Furenlid; H. Bradford Barber; Jeffrey A. Koch, Editor(s)

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