(MAPLD Conference)
C0: Janet L. Barth
NASA/GSFC
"An Overview of the Radiation Environment for Spaceflight Electronics"
The objective of the overview is to provide an
understanding of the components of the radiation environment that must be considered when
assessing the risk of flying programmable technologies in aerospace systems. Topics that
will be covered are: a brief description of solar processes as they pertain to the trapped
and transient radiation levels in the near-Earth region; a description of the major
components of the radiation environments that are hazardous to electronics, including
measurements of particle populations; and a review of the models used to define these
environments for engineering applications.
Today’s flight systems are designed with greatly reduced built-in
shielding, while at the same time, using parts that are more radiation sensitive. This
approach relies on accurate, application specific definitions of the radiation
environment, driving the need for radiation models with lower uncertainty factors. In the
past two years, new environment models have become available that claim accuracy of 25% or
better. The use and application of these models will be discussed.
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