Figure 1 (IMAGE) American Physical Society Caption Fast ion transport in DIII-D. (Top) Measured fast ion velocity-space flow images from the imaging neutral particle analyzer. The fast ions are moving out of the blue regions and into the red regions. Alfvén waves cause the fast ions to move along the paths as indicated. (Bottom) Simulation results reproduce the behaviors observed in the experiment. Credit X. Du, General Atomics Usage Restrictions Use with credit License Original 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.