The ST environment: Expected charged particle radiation levels

Physics

Scientific paper

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Charged Particles, Flux Density, Hubble Space Telescope, Incident Radiation, Mapping, Geomagnetism, Radiation Dosage, Spacecraft Contamination, Tables (Data), Trapped Particles

Scientific paper

The external (surface incident) charged particle radiation, predicted for the ST satellite at the three different mission altitudes, was determined in two ways: (1) by orbital flux-integration and (2) by geographical instantaneous flux-mapping. The latest standard models of the environment were used in this effort. Magnetic field definitions for three nominal circular trajectories and for the geographic mapping positions were obtained from a current field model. Spatial and temporal variations or conditions affecting the static environment models were considered and accounted for, wherever possible. Limited shielding and dose evaluations were performed for a simple geometry. Results, given in tabular and graphical form, are analyzed, explained, and discussed. Conclusions are included.

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