We're powering possibilities. Our Lab is a longstanding leader in the science and engineering behind the development of fusion energy — a clean, safe, and virtually limitless energy source. With an eye to the future, we're also applying our expertise in plasma, the fourth state of matter, to microelectronics, quantum materials and devices, and sustainability science. Mission The Princeton Plasma Physics Laboratory is a proud U.S. Department of Energy national laboratory managed by Princeton University. We’re dedicated to developing the scientific knowledge and advanced engineering to enable fusion to power the U.S. and the world; advancing the science of nanoscale fabrication for technologies of tomorrow; and furthering the scientific understanding of the plasma universe from laboratory to astrophysical scales. Vision Enabling a world powered by safe, clean and plentiful fusion energy while leading discoveries in plasma science and technology Learn More Related links DOE United States Department of Energy website DOE Office of Science website DOE Fusion Energy Sciences (FES) website DOE Princeton Site Office (PSO) website Related documents PPPL Facts At A Glance