Catching a Plasma Predator (IMAGE) American Physical Society Caption This schematic shows the DIII-D tokamak and layout of the UCLA Doppler Backscattering "radar gun" diagnostic. Credit Lothar Schmitz (UCLA) and M.R. Wade (General Atomics) 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.