Space dosimeter card
Space Micro Inc.
San Diego, CA

Space Micro’s space dosimeter card has been successfully integrated at NASA Goddard Space Flight Center (Greenbelt, MD) into the Living with a Star (LWS), Space Environments Testbed (SET) experiment hardware. This hardware was designed by Clemson University, and was delivered to Goddard in 2007. Space Micro manufactured and tested the space-qualified card per Goddard space quality standards.

The specific experiment is called the Dosimetry Intercomparison and Miniaturization Experiment (DIME), which will monitor the radiation dose seen in space using multiple radiation detector technologies. The objectives of this experiment are to use five different commercial off-the-shelf (COTS) micro-dosimeters to characterize radiation-induced total ionizing dose, displacement damage, and single event effects in space.

The technology is designed to provide data to allow appropriate dosimetry selection in future missions to characterize and resolve operational anomalies, and also to validate particle transport codes by varying shielding thicknesses. The DIME experiment card is scheduled to be launched as a secondary payload on an Air Force booster.

The goal of the Living With a Star Program is to develop the scientific understanding needed to address aspects of the connected Sun-Earth system that may affect life and society. The LWS Targeted Research and Technology (TR&T) program seeks to understand the integral system linking the Sun to the Earth, both directly and via the heliosphere, magnetosphere, and ionosphere.

LWS characterizes those aspects of the Earth’s radiation belt environment needed to design reliable electronic subsystems for use in air and space transportation systems, and defines the radiation environment beyond the Earth’s magnetosphere to enable exploration of interplanetary space by humans. The program also improves our understanding of the effects of solar variability and disturbances on terrestrial climate change, and helps predict solar energetic particle events that affect the safety of humans and technology in space.

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NASA Tech Briefs Magazine

This article first appeared in the March, 2009 issue of NASA Tech Briefs Magazine.

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