DIII-D Upgrade (image) American Physical Society Caption This is a design drawing showing bus-sized beam injector tilted upward relative to the DIII-D tokamak chamber on the left. Credit Richard J. Buttery and M.R. Wade, General Atomics Usage Restrictions None 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.