(IMAGE) DOE/Princeton Plasma Physics Laboratory Caption The off-white circles were burned into the black paper to test the laser for SMART’s Thomson scattering diagnostic. Credit University of Seville Usage Restrictions Credit must be given to the creator. License CC BY 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.