Development of a Beamline for Condensed Matter Physics and Materials Research at the Advanced Photon Source

9312543美国莫奇里正在建造一个“第三代”同步加速器X射线源，项目总成本超过10亿美元：阿贡国家实验室的高级光子源。在APS，人们可能会预计震源亮度会提高三到四个数量级。因此，使用与X射线系统完全不同的技术，如强度起伏光谱，进行实验将成为可能。此外，目前的技术，如表面X射线散射、时间分辨散射和X射线磁散射，将进一步改进，以产生超出当前来源范围的洞察力。至关重要的是，高质量的、由国家科学基金会支持的大学团体在APS开展的研究中发挥领导作用，特别是因为该设施可以在研究生教育中发挥作用。该项目将在APS开发一条光束线，以开展凝聚态物理和材料科学的前沿研究。该科学方案涉及：(A)利用相干X射线进行强度相关起伏；(B)表面相变、结构、动力学和生长的散射研究；(C)新型磁系统，包括无序磁系统的X射线磁散射研究。这条光束线将由麻省理工学院、IBM和麦吉尔大学的科学家共享，其他科学家也可以使用。***

9312543 Mochrie The United States is building a "third generation" synchrotron x- ray source with a total project cost in excess of $1 billion: The Advanced Photon Source (APS) at Argonne National Laboratory. At the APS, one may expect an improvement in the source brilliance by three-to-four orders of magnitude. As a result, it will become possible to pursue experiments using techniques completely novel to the x-ray regime such as intensity fluctuation spectroscopy. In addition, current techniques, such as surface x- ray scattering, time-resolved scattering, and x-ray magnetic scattering will be further refined to yield insight that is beyond the scope of current sources. It is essential that high quality, NSF supported, university groups play a leadership role in the research carried out at the APS most especially because of the role that the facility can play in graduate education. This project will develop a beamline at the APS to carry out forefront research in condensed matter physics and materials science. The scientific program involves: (a) intensity correlation fluctuation using coherent x-rays; (b) scattering studies of surface phase transformations, structure, kinetics and growth; and (c) x-ray magnetic scattering studies of novel magnetic systems, including disordered magnetic systems. This beamline will be shared by scientists from Massachusetts Institute of Technology, IBM, and McGill University, and will be available to other scientists, as well. ***