Computer Science
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984itns...31.1183s&link_type=abstract
(IEEE, U.S. Defense Nuclear Agency, U.S. Department of Energy, and NASA, Annual Conference on Nuclear and Space Radiation Effect
Computer Science
21
Cosmic Rays, Earth Atmosphere, Heavy Nuclei, Neutron Emission, Nuclear Interactions, Radiation Effects, Single Event Upsets, Energy Spectra, Neutron Flux Density, Pions, Radiation Shielding, Solar Activity Effects, Solar Protons
Scientific paper
Heavy cosmic ray nuclei are mostly attenuated with a shielding of 50 g/sq cm atmospheric gas. However, the shielding acts as a generator of neutrons, evaporated or knocked out of nuclei. These neutrons generate highly ionizing nuclear recoils that produce single-event upsets in microelectronic components. To attenuate the secondary neutron flux over 300 g/sq cm of atmospheric material is required. The numerous slow protons from nuclear interactions in shielding will also generate upsets in sensitive components, which have a low critical charge. At altitudes below 65,000 feet, most single-event upsets are due to these secondary particles. The upset rates due to neutrons and slow secondary protons from cosmic ray, solar flare particle, and trapped radiation particle interactions are presented as a function of the critical charge.
Letaw John R.
Silberberg Rein
Tsao C. H.
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