Calming the Plasma Edge (IMAGE) American Physical Society Caption This is a comparison of visible light from a reference no-Li discharge and one with Li injection in DIII-D. Li-II visible emission is primarily green in this image from Lawrence Livermore National Laboratory. Credit G.L. Jackson, et al., 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.