Powerful X-ray Laser Science (IMAGE) Arizona State University Caption ASU Biodeisgn delegation (Ray Dubois, Roger Johnson and Petra Fromme) is with the director of the PAL-XFEL Dr. In Soo Ko, and one of his colleagues in the 1.1 kilometer long accelerator tunnel of the PAL XFEL. Credit ASU and POSTECH 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.