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Estimate of Space-Radiation Effects on Satellite Solar-Cell Power Supplies

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4 Author(s)
J. M. Denney ; Space Technology Laboratories, Inc., Los Angeles, Calif. ; R. G. Downing ; S. R. Lackman ; J. W. Oliver

The charged-particle intensity and energy distribution at the heart of the inner and outer Van Allen belts is compared with the experimentally determined radiation sensitivity of silicon solar cells. Energy dependence of the radiation damage and solar-cell characteristics is included in the lifetime estimate of spacecraft solar cells. Use of charged-particle range-energy relations and the differential intensity of the Van Allen radiation results in an estimated effectiveness of thin protective shields. Comparative advantages of thin shields, advanced cell designs, solar efficiency, and solar-cell system over-design are discussed with respect to radiation resistance of spacecraft power supplies.

Published in:

IRE Transactions on Military Electronics  (Volume:MIL-6 ,  Issue: 1 )