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FPGAs operating in a radiation environment: lessons learned from FPGAs in space

Field Programmable Gate Arrays (FPGAs) are increasingly being used as a key component of digital systems because of their in-field reprogrammability, low non-recurring engineering costs (NRE), and relatively short design cycle. Recently, there has been great interest in using FPGAs within spacecraft. FPGAs, like all semiconductor devices, are susceptible to the effects of radiation. There is an active research community investigating the effects of radiation on FPGAs and developing methods to mitigate against these effects. There has been significant progress over the last decade in the understanding and developing FPGA technology that is resistant to the effects of radiation. The success of FPGAs within spacecraft suggests that FPGAs may be used in particle physics experiments where radiation levels are considerable higher than the conventional terrestrial earth environment. This paper will summarize the effects of radiation on FPGAs, methods to mitigate against these effects, provide a case study of a successful FPGA system operating in space, and discuss the issues that will affect the use of FPGAs within particle physics experiments.