Large Helical Device Fusion Research Project

completed

The Large Helical Device (LHD) in Japan operated for nearly 30 years as a critical test bed for international fusion energy research. It helped prove that stellarators can be a stable and reliable pathway toward creating a limitless source of energy on Earth. The project involved international collaboration, including researchers from the U.S. Department of Energy’s Princeton Plasma Physics Laboratory (PPPL). The project has now completed its final experimental campaign and is winding down to make way for new experiments with more flexible devices like the Compact Helical Device (CHD) and CHD-U.