题　目：Enabling the Frontiers of X-ray Science: X-ray Optics Research and Developments at the Advanced Photon Source, Argonne National Laboratory
报告人：Lahsen Assoufid(X-ray Science Division,Argonne National Laboratory,Lemont,IL         60439,assoufid@aps.anl.gov 
时　间：9月25日（周五），上午10:30-11:30
地　点：物理馆512会议室

报告摘要（Abstract）:

The Advanced Photon Source (APS) at Argonne National Laboratory is one of the five U.S. Department of Energy Office of Science high brightness x-ray user facilities. It is a powerful third-generation hard x-ray synchrotron radiation source, providing access to an extensive collection of x-ray tools and techniques that enable cutting edge research in a broad range of scientific research including materials, biomedical, environment, and energy science. This 7-GeV storage ring facility, with its 66 beamlines operating simultaneously around the clock, hosts more than 5,000 unique users per year from the U.S.A. and abroad. Research done at the APS has led to major discoveries that have helped advance our knowledge and had been of benefit to society as a whole. The 2009 and 2012 Nobel Prizes in Chemistry were awarded for discoveries based in large part on research at the APS. 

With the increasing demand for large spatial coherence, small probe beams combined with high flux to explore new frontiers of science at nanoscale levels and short time scale levels, plans are underway to upgrade the APS storage ring with a multi-bend achromat lattice with the goal of improving the source emittance by a factor of about 50 and the coherence flux by factors of 100-1000× compared to the current APS. Taking full advantage of these new properties cannot be done without equal progress in beamline optics and instrumentation that benefit from revolutionary quality and design.

After a brief introduction to x-ray synchrotron radiation, I will give a general overview of the APS and the APS upgrade and status. The rest of my presentation will be devoted to optics requirements and challenges and to APS optics developments, investment and steps being taken to overcome some of those challenges.

*This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract No. DE-AC-02-06CH11357.