Acquisition of an X-Ray CCD Detector System for Materials Research at Advanced Photon Source

9802643 Chen该合同为采购分析X射线CCD系统提供部分支持，该系统配备2K x 2K像素CCD相机、3轴测角仪、计算机工作站和用于数据采集和晶体结构测定的综合软件包。 该CCD系统将用于阿贡国家实验室高级光子源（APS）的UNICAT波荡器光束线，作为UNICAT成员和独立调查员的共用设施。 UNICAT是一个大学-国家实验室-工业界合作获取小组，包括伊利诺伊大学厄巴纳-香槟分校、橡树岭国家实验室、美国国家标准与技术研究院（NIST）和UOP研究与开发部。 UNICAT联合体目前得到资助，在高级光子源建造一个扇区，即两条光束线。 弯曲磁体束线将具有用于X射线吸收光谱、X射线形貌成像和通用X射线衍射的实验能力。 UNICAT插入装置光束线将有两个实验站：一个高分辨率X射线衍射仪和一个专用表面/界面衍射仪。 自1997年8月以来，UNICAT插入装置光束线及其两个实验站已开始初步试运行;预计全面运行的日期为1998年12月。（1）用于结构测定的微晶衍射，（2）小角度X射线散射，和（3）时间分辨表面/界面散射。 对于微晶衍射，项目包括从微米级单晶（如沸石和单纤维丝）确定结构。 小角X射线散射部分的工作包括透射和掠入射几何研究问题，如沸石从溶液中结晶动力学测量，基于自仿射分形几何和MOCVD衍生氧化物薄膜的标度概念的二维外延成核和生长机制等。第三个研究领域是时间分辨表面/界面散射，动力学粗糙化，界面应变和生长，以及表面/薄膜形态的演变将使用表面敏感散射技术进行研究。 所有拟议的科学计划都代表了科学和技术挑战的主题，这些挑战可以从使用二维CCD探测器以及APS第三代源的波荡器插入装置产生的高亮度同步辐射中受益匪浅。

9802643ChenThis award provides partial support for the acquisition of an analytical x-ray CCD system, complete with a 2K x 2K pixel CCD camera, a 3-axis goniometer, a computer workstation and a comprehensive software package for data acquisition and crystal structure determination. This CCD system will be used at the UNICAT undulator beam line at the Advanced Photon Source (APS), Argonne National Laboratory, as a common facility available to both UNICAT members and Independent Investigators. Training for the use of this CCD system will be carried out by UNICAT scientific staff via a sector-specific training program already in existence as a part of the UNICAT management plan that was approved by APS.UNICAT is a University-National Laboratory-Industry Collaborative Access Team including the University of Illinois at Urbana-Champaign (UIUC), the Oak Ridge National Laboratory (ORNL), the National Institute of Standards and Technology (NIST) and the UOP Research and Development. The UNICAT consortium is presently funded to construct one sector, i.e. two beamlines, at the Advanced Photon Source. The Bending Magnet beamline will have experimental capablilities for x-ray adsorption spectroscopy, for x-ray topography imaging and for general purpose x-ray diffraction. The UNICAT Insertion Device beamline will have two experimental stations: a high-resolution x-ray diffractometer and a dedicated surface/interface diffractometer. The UNICAT Insertionn Device beamline and its two experimental stations have been in preliminary commissioning operation since August 1997; the anticipated date for a full operation is December 1998.The x-ray CCD system will be principally utilized by UIUC and UOP scientists to carry out scientific projects in three main areas: (1) microcrystal diffraction for structure determination, (2) small-angle x-ray scattering, and (3) time-resolved surface/interface scattering. For microcrystal diffraction, projects encompass structure determination from micron-sized single crystals such as zeolites and single fiber filaments. Small-angle x-ray scattering portion of the work includes transmission and grazing-incidence geometry to study problems such as crystallization kinetics measurements of zeolites from solutions, 2-dimensional epitaxial nucleation and growth mechanism based on self-affine fractal geometry and scaling concept of MOCVD-derived oxide thin films, etc. The third research area is in time-resolved surface/interface scattering for which kinetic roughening, interface strain and growth, and evolution of surface/thin film morphology will be investigated using surface-sensitive scattering techniques. All proposed scientific programs represent topics of scientific and technological challenges which can greatly benefit from the use of a 2-d CCD detector in conjunction with the high-brilliance synchrotron radiation produced by the undulator insertion devices of the third-generation source at APS.%%%***