Office of Fusion Energy Sciences DIII-D National Fusion Facility, U.S. Department of Energy DIII-D National Fusion Facility, U.S. Department of Energy Office of Fusion Energy Sciences DIII-D National Fusion Facility, United States Department of Energy DIII-D National Fusion Facility, United States Department of Energy Office of Science Office of Fusion Energy Sciences DIII-D National Fusion Facility