Figure 2 (IMAGE) American Physical Society Caption The prediction of doubling the off-axis current-drive efficiency due to more selective wave energy damping via a top-launch ECCD system has been validated by recent experiments at DIII-D. Left is prediction using the CQL3D quasi-linear Fokker-Planck code and right are measurements. Credit Xi Chen, DIII-D National Fusion Facility Usage Restrictions Use with appropriate credit. 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.