Funding will support the project team's small-scale research and development of high-entropy materials (HEM) to replace conventional cesium-based coatings associated with negative hydrogen ion sources in fusion reactors, focusing on improving the durability and stability of surfaces for neutral beam injection.
Office of NEPA Policy and Compliance
April 15, 2026
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Funding will support the project team's small-scale research and development of high-entropy materials (HEM) to replace conventional cesium-based coatings associated with negative hydrogen ion sources in fusion reactors, focusing on improving the durability and stability of surfaces for neutral beam injection. Specifically, the project team will (1) identify HEM for application in negative ion beam generation that meet predetermined metrics, (2) down select HEM, test and validate to meet next level metrics, (3) identify final HEM, test and validate properties in a fusion-like environment to meet final metrics, and (4) conduct a techno-economic analysis and life cycle assessment for next phase development. If successful, this project will advance the efficiency and reliability of fusion energy systems, ultimately reducing dependence on foreign energy, thereby increasing U.S. energy security.