About the Photon Sciences Directorate

The Photon Sciences Directorate operates the National Synchrotron Light Source (NSLS) and is constructing the National Synchrotron Light Source II (NSLS-II), both funded by the Department of Energy Office of Science. These facilities support a large community of scientists using photons (light) to carry out research in energy and environmental sciences, physics, materials science, chemistry, biology and medicine.  

National Synchrotron Light Source

National Synchrotron Light Source II

This is a very exciting period for photon sciences at Brookhaven Lab and a time of unprecedented growth for the directorate. The NSLS-II Project is progressing rapidly and smoothly through design and construction, driven by our goal of building the most advanced synchrotron light source in the world. At the same time, NSLS continues a nearly three-decade-long tradition of outstanding service to a substantial and productive user community, enabling a rich variety of scientific programs.  

The new capabilities enabled by NSLS-II promise even greater scientific discoveries and impact. In particular, NSLS-II will enhance national and energy security and help drive abundant, safe, and clean energy technologies. The new facility will produce x-rays more than 10,000 times brighter than the current NSLS and host a suite of sophisticated instruments for cutting-edge science.