Space Radiation and its Effects on EEE Components

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<strong>Space</strong> <strong>Radiation</strong> <strong>and</strong> <strong>its</strong> <strong>Effects</strong> on EEE Components Galactic Cosmic Rays (1) � Flux ~ 4 particles /cm 2 /sec in space, anticorrelation with solar activity � Atmosphere shields Earth’s surface from “primary" cosmic rays � Collisions in upper atmosphere produce "secondary" cosmic rays - some reach ground level (seen in “neutron monitors”) � Average person is crossed by ~ 100 relativistic muons per second � Discovered in 1912 by Austrian Victor Hess � Supernovae produce high energy cosmic rays, accelerated by moving shocks, as suggested by Enrico Fermi in 1949. � Charged particles accelerated to near speed of light ( can reach ~10 20 eV range. The most powerful particle accelerators on Earth “weak” in comparison) � Most accurate GCR model is CREME96 by NRL. EPFL <strong>Space</strong> Center 9th June 2009
<strong>Space</strong> <strong>Radiation</strong> <strong>and</strong> <strong>its</strong> <strong>Effects</strong> on EEE Components Galactic Cosmic Rays (2) • Anticorrelation with solar min/max periods EPFL <strong>Space</strong> Center 9th June 2009
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Space Radiation and its Effects on EEE Components

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