Tracking Down Fusion Impurities (IMAGE) American Physical Society Caption Results from a recent turbulence simulation reveal turbulent structures believed to be responsible for the measured levels of impurity transport. Credit Nathan Howard, MIT 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.