G. Brian Stephenson, Associate Laboratory Director, Photon Sciences

G. Brian Stephenson

Associate Laboratory Director
- Photon Sciences

G. Brian Stephenson is the associate laboratory director for Photon Sciences.

The Photon Sciences directorate consists of the X-ray Science, Accelerator Systems and Advanced Photon Source Engineering Support divisions, which comprise the Advanced Photon Source (APS); and the Argonne Accelerator Institute.

The APS is the brightest source of high-energy X-rays in the Western Hemisphere and is used to study the structures of materials and processes at the atomic scale. It is also the largest scientific user facility in the North America, with more than 3,500 users visiting each year.

Stephenson’s research interests focus on developing and using synchrotron X-ray techniques to understand materials synthesis and processing. He has extensive experience in building and managing synchrotron X-ray instrumentation and beamlines, and was the recipient of an R&D 100 Award for his work on the Hard X-Ray Nanoprobe beamline at APS. Prior to becoming director in 2010, he had been involved for many years in carrying out research at APS and in developing the proposal to upgrade the APS.

Stephenson joined the staff of Argonne’s Materials Science Division in 1995. Previously he was a research staff member and group leader at IBM Research in Yorktown Heights, NY. He is co-author of more than 150 publications, and a Fellow of the American Physical Society. He received B.S. and M.S. degrees in 1978 from the Massachusetts Institute of Technology, and a Ph.D. in 1983 from Stanford University.