Operation of commercial R3000 processors in the Low Earth Orbit (LEO) space environment

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...

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Veröffentlicht in:	IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) 1991-12, Vol.38 (6), p.1415-1420
Hauptverfasser:	Kaschmitter, J.L., Shaeffer, D.L., Colella, N.J., McKnett, C.L., Coakley, P.G.
Format:	Artikel
Sprache:	eng
Schlagworte:	440200 - Radiation Effects on Instrument Components, Instruments, or Electronic Systems 661320 - Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-) BARYON REACTIONS CHARGED-PARTICLE REACTIONS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COMMERCIAL SECTOR Computer aided instruction COMPUTERS COSMIC RADIATION Cosmic rays COST Degradation DOSE RATES ELECTRONIC CIRCUITS HADRON REACTIONS HARDENING INHIBITION INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY IONIZATION Ionizing radiation IONIZING RADIATIONS LAWRENCE LIVERMORE LABORATORY Low earth orbit satellites MICROELECTRONIC CIRCUITS MICROPROCESSORS NATIONAL ORGANIZATIONS NUCLEAR REACTIONS NUCLEON REACTIONS OPERATION PHYSICAL RADIATION EFFECTS PROTON REACTIONS Protons RADIATION EFFECTS RADIATION HARDENING RADIATIONS Reduced instruction set computing SPACE SPACE VEHICLES TESTING TOLERANCE US AEC US DOE US ERDA US ORGANIZATIONS VEHICLES
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Zusammenfassung:	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 but are not normally designed to tolerate effects induced by the LEO environment. Extensive testing of the MIPS R3000 Reduced Instruction Set Computer (RISC) microprocessor family for operation in LEO environments is reported. The authors have characterized total dose and SEP effects for altitudes and inclinations of interest to systems operating in LEO, and they postulate techniques for detection and alleviation of SEP effects based on experimental results.< >
ISSN:	0018-9499 1558-1578
DOI:	10.1109/23.124126