Ms. Amelia McMullen-Petersen Profile

Amelia McMullen-Petersen

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Proceedings Article | 1 September 2011 Paper

OLTARIS: an efficient web-based tool for analyzing materials exposed to space radiation

Tony Slaba, Amelia McMullen, Sheila Thibeault, Chris Sandridge, Martha Clowdsley, Steve Blattnig

Proceedings Volume 8164, 81640G (2011) https://doi.org/10.1117/12.898960

KEYWORDS: Particles, Aluminum, Solar energy, Silicon, Databases, Electronic components, 3D modeling, Analytical research, Solar radiation, Computer aided design

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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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