The near-Earth space radiation environment includes energetic galactic cosmic rays (GCR), high intensity proton and
electron belts, and the potential for solar particle events (SPE). These sources may penetrate shielding materials and
deposit significant energy in sensitive electronic devices on board spacecraft and satellites. Material and design
optimization methods may be used to reduce the exposure and extend the operational lifetime of individual components
and systems. Since laboratory experiments are expensive and may not cover the range of particles and energies relevant
for space applications, such optimization may be done computationally with efficient algorithms that include the various
constraints placed on the component, system, or mission. In the present work, the web-based tool OLTARIS (On-Line
Tool for the Assessment of Radiation in Space) is presented, and the applicability of the tool for rapidly analyzing
exposure levels within either complicated shielding geometries or user-defined material slabs exposed to space radiation
is demonstrated. An example approach for material optimization is also presented. Slabs of various advanced multifunctional
materials are defined and exposed to several space radiation environments. The materials and thicknesses
defining each layer in the slab are then systematically adjusted to arrive at an optimal slab configuration.
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