SLAC National Accelerator Laboratory (IMAGE) DOE/SLAC National Accelerator Laboratory Caption SLAC National Accelerator Laboratory is home to a two-mile linear accelerator -- the longest in the world. Originally a particle physics research center, SLAC is now a multipurpose laboratory for astrophysics, photon science, accelerator and particle physics research. Credit Image courtesy of SLAC. Usage Restrictions Please credit image as courtesy of SLAC. 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.