Passive Space-Environment-Effect Measurement on the International Space Station

The Micro-Particles Capturer and Space Environment Exposure Device is the Japan Aerospace Exploration Agency’s experiment on particle capture and space exposure of material mounted on an aluminum tray. The trays were placed on the exterior of the Russian service module of the International Space Station. All trays were retrieved and returned toEarth. This paperpresents our analysis of the effects that space exposure imparted on themonitoring samples in the firstand second-retrievedMicro-Particles Capturer and Space Environment Exposure Device trays. The monitoring samples yield space-environment data such as atomic oxygen, ultraviolet, fluence, and space radiation dose data. The exposure and monitoring samples were retrieved after 315 and 865 days of exposure.