See https://d3dfusion.org/about-diii-d/The DIII-D National Fusion Facility is a user facility of the U.S. Department of Energy, Office of Science.An Office of Science user facility is a federally sponsored research facility available for external use to advance scientific or technical knowledge under the following conditions:The facility is open to all interested potential users without regard to nationality or institutional affiliation.Allocation of facility resources is determined by merit review of the proposed work.User fees are not charged for non-proprietary work if the user intends to publish the research results in the open literature. Full cost recovery is required for proprietary work.The facility provides resources sufficient for users to conduct work safely and efficiently.The facility supports a formal user organization to represent the users and facilitate sharing of information, forming collaborations, and organizing research efforts among users.The facility capability does not compete with an available private sector capability.ResearchThe DIII-D Experimental Science team seeks to pioneer the scientific basis, technologies, and integrated solutions needed to make fusion energy a reality, concurrent with the development of the workforce required to achieve this. The research program at DIII-D takes a holistic approach to test and integrate multiple solutions and approaches with the aim of creating a functional regime for fusion energy production. This work leverages the facility being sufficiently large and powerful to be relevant to modern fusion energy production questions while remaining small enough to rapidly evolve in response to changing needs and questions in the field. Research at DIII-D is performed by an international and interdisciplinary team of collaborators, who are organized into 3 research groups and their associated topical areas. Current research initiatives aim to: Plasma-Interacting Technology group: Provide experimental test bed for technology development and validation in a fusion reactor-relevant plasma environment to mature FPP technology Fusion Pilot Plant Research group: Address the gaps in physics knowledge presenting challenges to the development of a commercially viable fusion pilot plant ITER Research group: Establish operating procedures and necessary physics knowledge required for ITER to achieve its research goals Ultimately, all of these groups serve the broader goal of establishing a basis for better optimization, prediction and projection of fusion energy solutions, as well as advancing the fundamental understanding of fusion plasmas. The success of the research program at DIII-D is demonstrated by the hundreds of peer-reviewed publications based on DIII-D data that have advanced the understanding of fusion and its application as an energy source. Additionally, the pioneering work performed at DIII-D has been repeatedly recognized within the fusion science field, being presented in invited talks at scientific and technical conferences worldwide and recognized with numerous awards for research excellence. DiagnosticsComprehensive measurements that allow characterization and control of relevant physics parameters are essential to understanding events in a fusion reactor and building knowledge to produce breakthroughs in fusion development and control. DIII‑D has the most comprehensive diagnostic set of any magnetic fusion facility, and the success of fusion research at DIII-D has a foundation in the pursuit of three important aspects related to diagnostics: high-quality measurements that are accurate and precisely calibrated, highly reliable measurements in support of experiments, and complete measurements that provide the appropriate coverage and resolution of necessary parameters. Diagram of diagnostics installed on one half of DIII-D, circa 2022.The current diagnostic set installed on DIII-D exceeds 100 individual diagnostics and is the result of many productive collaborations among the over 130 participating institutions. This set is continually expanding, as DIII-D offers a very flexible environment supporting new and innovative diagnostics. Furthermore, developing and fielding a diagnostic on DIII‑D remains an essential involvement for many research groups, with diagnostic work offering the capacity for direct participation in experiments and scientific discoveries and opening an exceptionally engaging and formative path for students. A list of DIII-D’s Diagnostics Systems can be found here.