Ice Injection into a Plasma (IMAGE) American Physical Society Caption Figure 1: Visible light image of SPI into a tokamak plasma. Ice shards can be seen entering the plasma (invisible, edge indicated by white line) heading toward plasma core (indicated by white cross). Bright light at top is gas (used to propel the pellet), which does not penetrate the plasma edge. Blue line indicates the outer wall of the DIII-D tokamak. Credit Courtesy R.A. Moyer UC-San Diego. 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.