National Synchrotron Light Source II

National Synchrotron Light Source II
Name	National Synchrotron Light Source II
Caption	Aerial view of the NSLS-II facility at Brookhaven National Laboratory.
Coordinates	40, 52, 10, N...
Institution	Brookhaven National Laboratory
Location	Upton, New York
Type	Synchrotron light source
Energy	3 GeV
Circumference	792 m
Website	https://www.bnl.gov/ps/

National Synchrotron Light Source II is a state-of-the-art, third-generation synchrotron light source located at Brookhaven National Laboratory on Long Island. As one of the world's most advanced facilities of its kind, it produces extremely bright X-ray beams used to probe the atomic and molecular structure of matter. The facility supports a vast international user community across disciplines including materials science, biology, chemistry, and environmental science.

Overview

The facility is a major United States Department of Energy Office of Science user facility, operated by Brookhaven Science Associates for the DOE Office of Science. It succeeds the original National Synchrotron Light Source, which operated from 1982 to 2014. The design and construction of the new facility represented a significant leap forward, aiming to provide beam brightness and stability orders of magnitude greater than its predecessor. This capability enables scientists to conduct experiments that were previously impossible, studying materials under extreme conditions and visualizing processes at the nanoscale.

History and Development

Planning for a next-generation light source at Brookhaven National Laboratory began in the early 2000s, following the decades of success of the original NSLS. The project received formal approval from the United States Department of Energy in 2005, with groundbreaking occurring in 2009. The construction phase involved a large collaboration of engineers and scientists from Brookhaven National Laboratory and numerous other institutions. The facility achieved first light in 2014 and officially commenced full user operations in 2015, marking a new era for synchrotron science in the United States.

Technical Specifications

The heart of the facility is an electron storage ring with a circumference of 792 meters, operating at an energy of 3 billion electron volts (GeV). It utilizes a hybrid lattice design combining double-bend achromat and triple-bend achromat sections to achieve ultra-low electron beam emittance, a key parameter determining brightness. The ring is fed by a full-energy linac and a booster synchrotron. Critical enabling technologies include advanced superconducting magnets for insertion devices and sophisticated beam stability systems that maintain orbit precision at the sub-micron level.

Scientific Capabilities and Beamlines

The experimental program is conducted at specialized beamlines positioned around the ring. These beamlines are equipped with cutting-edge instrumentation such as monochromators, mirror systems, and detectors tailored for specific techniques. Key techniques available include X-ray diffraction, X-ray spectroscopy, X-ray imaging, and small-angle X-ray scattering. Notable beamlines include the Hard X-ray Nanoprobe, the In situ and Operando Soft X-ray Spectroscopy beamline, and the Coherent Hard X-ray scattering beamline. Each beamline is managed by a team of scientists who collaborate with external researchers.

Research and Applications

Research at the facility drives innovation in numerous critical fields. In energy storage, scientists study the chemical processes inside batteries and fuel cells in real time. In quantum materials, researchers investigate exotic states of matter like superconductivity. The facility is pivotal in structural biology for determining complex protein structures and in environmental science for tracing the fate of contaminants. Work here also supports the development of new pharmaceuticals, advanced catalysts, and next-generation semiconductors.

Facility Operations and User Program

Access to the facility is granted through a competitive peer-reviewed proposal system open to researchers from academia, industry, and government laboratories worldwide. The Scientific User Facilities division of the DOE Office of Science oversees this program. Each year, thousands of scientists conduct experiments, supported by the facility's expert staff. The data generated contribute to thousands of publications in prestigious journals like Science and Nature. The facility also plays a vital role in training the next generation of scientists through educational workshops and internships.

Category:Brookhaven National Laboratory Category:Synchrotron radiation facilities Category:Buildings and structures in Suffolk County, New York