Cornell High Energy Synchrotron Source

Cornell High Energy Synchrotron Source. It is a premier national synchrotron light source facility located at Cornell University in Ithaca, New York. CHESS produces intense X-ray beams used by scientists from academia, industry, and national laboratories for cutting-edge research across numerous scientific disciplines. The facility operates as a United States Department of Energy-supported user facility, providing open access to its experimental stations through a competitive peer-review proposal system.

Overview and History

The origins of the Cornell High Energy Synchrotron Source are deeply intertwined with the history of particle physics at Cornell University. The facility was established in the late 1970s to utilize synchrotron radiation emitted by the Cornell Electron Storage Ring, a high-energy physics collider built for experiments in elementary particle physics. Pioneering work by physicists like Robert R. Wilson demonstrated the potential of this parasitic X-ray source for materials science. This led to the formal creation of CHESS, one of the first dedicated synchrotron X-ray facilities in the United States. Throughout the 1980s and 1990s, CHESS evolved from a parasitic operation on CESR to a fully dedicated light source following the conclusion of the Cleo (particle detector) experiment, cementing its role as a vital resource for the materials science and structural biology communities.

Scientific Capabilities and Beamlines

The core scientific capabilities of the Cornell High Energy Synchrotron Source are delivered through its suite of advanced X-ray beamlines and experimental end stations. These beamlines exploit various X-ray techniques, including high-resolution X-ray diffraction, X-ray absorption spectroscopy, and small-angle X-ray scattering. Key beamlines include the dedicated macromolecular crystallography stations for determining protein structures and the high-energy beamlines for penetrating dense materials. The facility is also home to the Center for High Energy X-ray Sciences, which develops novel methods like X-ray photon correlation spectroscopy. Specialized instrumentation, such as high-speed detectors developed in collaboration with the Paul Scherrer Institute, enables time-resolved studies of dynamic processes. This diverse portfolio allows researchers to probe the atomic and molecular structure of matter under extreme conditions.

Research Applications and Impact

Research conducted at the Cornell High Energy Synchrotron Source has a profound impact across fundamental science and applied technology. In structural biology, CHESS has been instrumental in determining the three-dimensional architectures of proteins, viruses, and enzymes, contributing to drug discovery efforts for diseases like COVID-19. In condensed matter physics, scientists use its beams to study quantum materials, superconductors like yttrium barium copper oxide, and magnetic systems. Research in geochemistry and environmental science examines soil contaminants and mineral formations, while work in engineering focuses on residual stress in advanced alloys and additive manufacturing components. These studies have led to breakthroughs published in high-impact journals such as Science (journal) and Nature (journal), and have supported technological advancements in partnership with companies like General Electric and Boeing.

Facility Operations and User Program

The Cornell High Energy Synchrotron Source operates as a major open-access user facility under the Basic Energy Sciences program of the United States Department of Energy. Access to beam time is granted through a competitive, peer-reviewed proposal system managed twice annually. The CHESS user program supports over 1,000 researchers annually from across the United States and internationally, representing hundreds of universities, corporations, and government laboratories. The facility provides comprehensive support to users, including scientific and technical staff assistance, sample preparation laboratories, and data analysis resources. Training for students and early-career scientists is a key component, fostering the next generation of synchrotron researchers. Operations and development are supported by a collaboration between Cornell University and the DOE's Brookhaven National Laboratory.

Technical Specifications and Accelerator Complex

The Cornell High Energy Synchrotron Source is driven by the Cornell Electron Storage Ring, which operates at an energy of 5.3 gigaelectronvolts and a circumference of 768 meters. CHESS utilizes both bending magnet and insertion device sources, particularly superconducting wiggler magnets, to generate high-flux, high-energy X-ray beams. The accelerator complex is housed in the historic Wilson Laboratory, named for physicist Robert R. Wilson. A major upgrade, completed in 2019, established CHESS as an energy-recovery linac-based source, known as CHESS-U, featuring a new superconducting linear accelerator and modernized storage ring lattice. This upgrade, supported by the National Science Foundation and the New York State Empire State Development, significantly enhanced beam brightness and stability, positioning the facility for future advancements in X-ray science.

Category:Synchrotron radiation facilities Category:Cornell University Category:Research institutes in New York (state)