Small Glass Scintillator Fibers (IMAGE) NASA/Johnson Space Center Caption This image shows the small glass scintillator fibers that can help make this a more effective neutron detector. When used in space, it will record the exposure of space travelers to incoming cosmic radiation. Credit NASA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.