Cosmic ray simulation and testing program

Computer Science

Scientific paper

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Latch-Up, Linear Energy Transfer (Let), Random Access Memory, Single Event Upsets, Microprocessors, Radiation Damage, Spacecraft Electronic Equipment, Very Large Scale Integration

Scientific paper

Single event upset (SEU) and latchup vulnerabilities were determined for a number of parts of interest to NASA space programs. In cases where a threshold linear energy transfer (LET) for SEU could be measured, an upset rate in a low inclination Space Shuttle orbit was computed. The predicted upset rates are extremely low, except for the devices with LET thresholds below the geomagnetic cutoff for altitude and inclination of the Space Shuttle orbit. While some of the devices do exhibit latchup, the cross sections and threshold LETs are such that the risk associated with flying these devices in low, near equatorial orbits is small if not negligible.

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