Operation Of Commercial R3000 Processors In The Low Earth Orbit (Leo) Space Environment
Nuclear Science, IEEE Transactions（1991）
摘要
Spacecraft processors must operate with minimal degradation of performance in the Low Earth Orbit (LEO) radiation environment, which includes the effects of total accumulated ionizing dose and Single Event Phenomena (SEP) caused by protons and cosmic rays. Commercially available microprocessors can offer a number of advantages relative to radiation-hardened devices, including lower cost, reduced development and procurement time, extensive software support, higher density and performance. However, commercially available systems are not normally designed to tolerate effects induced by the LEO environment.Lawrence Livermore National Laboratory (LLNL) and others have extensively tested the MIPS R3000 Reduced Instruction Set Computer (RISC) microprocessor family for operation in LEO environments. We have characterized total dose and SEP effects for altitudes and inclinations of interest to systems operating in LEO, and we postulate techniques for detection and alleviation of SEP effects based on experimental results.
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关键词
CMOS integrated circuits,aerospace instrumentation,cosmic ray effects and interactions,environmental testing,integrated circuit testing,microprocessor chips,proton effects,reduced instruction set computing,CMOS,LEO environment,MIPS R3000 RISC microprocessor,R3000 processors,cosmic rays,low Earth orbit space environment,protons,single event phenomena,spacecraft processors,testing,total accumulated ionizing dose
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