Inside of the Large Helical Device (IMAGE) National Institutes of Natural Sciences Caption Inside of the Large Helical Device. High-temperature plasma is confined by the two helical superconducting coils. Credit NIFS 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.