LCLS at SLAC (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This shows the two mile long Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory operated by Stanford University is the world's most powerful X-ray laser. Credit Image courtesy of SLAC 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.