Home A DOE Office of Science User Facility hosted by General Atomics About the DIII-D National Fusion FacilityLearn about DIII-D as a User Facility of the U.S. Department of Energy, and our role in the worldwide effort to develop fusion energy. Read MoreBecome a UserBecome a DIII-D user and advance your fusion research. Read MoreDIII-D in the NewsLearn about the latest research and events at DIII-D. Read More