Plasmoid Formation (IMAGE) DOE/Princeton Plasma Physics Laboratory Caption Current sheets and plasmoids are formed during the simulation of a process called coaxial helicity injection, which could produce effective startup current-drive in spherical tokamaks. Credit Fatima Ebrahimi 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.