Acquisition of CCD X-ray Detection System

购置CCD X射线检测系统

• 批准号: 0216919
• 负责人: Douglas Keszler
• 金额: $ 17.6万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0216919&HistoricalAwards=false
• 关键词: Acquisition; CCD; ray; Detection; System

This award from the Instrumentation for Materials Research program support will allow Oregon State University to purchase a new X-ray detection system that will be utilized for the determination of atomic-level structures of new high-technology materials as well as small molecules of relevance in biology and catalysis. The instrumentation comprises an area detector and temperature-control devices for examining structures over the temperature range of 77 to 1273 K. Such variable-temperature measurements provide a means for establishing relationships between atomic-level structures and bulk physical properties, such as thermal expansion, electrical conductivity, and laser action. By extension, such relationships establish the framework for invention and development of new types of microelectronic and optical devices. Temperature control can also be important for establishing the structures of small molecules that might be thermally unstable or only weakly efficient in scattering an X-ray beam. The new system also has considerable value in education. Because an overall view of a diffraction pattern is available from the area detector, unlike in serial systems, graduate students can much more readily absorb the concepts of diffraction and crystallography, leading to more productive classroom and research experiences. The high throughput of the system also allows an extension of the education experience to students involved in a number of materials-research collaborative programs, to undergraduates both at OSU and neighboring institutions, and to others beyond the University community. Altogether, these new opportunities will provide students with robust foundations for pursuing their career objectives.This award from the Instrumentation for Materials Research program support Oregon State University with the purchase a new X-ray detection system. The instrumentation will be used to support research and education activities in the areas of solid-state inorganic materials and small-molecule synthesis. The proposed instrument cluster comprises a CCD area detector with four-circle goniometer, low-temperature and high-temperature devices, and a fiber-optic collimator. This cluster will provide a means to broaden and more fully integrate the research and education missions of the University in the area of structure determination. The area detector makes possible the ready identification of supercells and incommensurate structures, short data-collection times and high throughput, and much improved avenues for teaching concepts in diffraction and crystallography. Coupling the high throughput of the area detector with low- and high-temperature devices provides opportunities in variable-temperature measurements that are currently unavailable. Structures of inorganic materials can be determined at both low and high temperatures to establish relationships between crystal structure and thermal-expansion, electrical, or optical properties, while weakly diffracting or thermallyunstable small molecules can be analyzed at low temperatures to obtain useful structural information. Further, local undergraduate education institutions and companies will have access to this instrument through collaborative projects.

这份来自材料研究仪器项目支持的合同将允许俄勒冈州立大学购买一套新的x射线探测系统，该系统将用于确定新型高科技材料的原子水平结构，以及与生物学和催化相关的小分子。该仪器包括一个区域探测器和温度控制装置，用于在77至1273 K的温度范围内检查结构。这种变温测量为建立原子级结构与体物理性质（如热膨胀、电导率和激光作用）之间的关系提供了一种方法。推而广之，这种关系为新型微电子和光学装置的发明和发展建立了框架。温度控制对于建立小分子的结构也很重要，这些小分子可能是热不稳定的，或者散射x射线的效率很低。新制度在教育方面也有相当大的价值。与串行系统不同，由于区域探测器可以获得衍射图案的整体视图，因此研究生可以更容易地吸收衍射和晶体学的概念，从而获得更富有成效的课堂和研究经验。该系统的高通量还允许将教育经验扩展到参与许多材料研究合作项目的学生，俄勒冈州立大学及其邻近机构的本科生，以及大学社区以外的其他人。总之，这些新的机会将为学生追求他们的职业目标提供坚实的基础。该奖项来自材料研究仪器项目，支持俄勒冈州立大学购买新的x射线探测系统。该仪器将用于支持固态无机材料和小分子合成领域的研究和教育活动。所提出的仪表组包括一个带有四圆测角仪的CCD区域检测器、低温和高温装置以及一个光纤准直器。这一组将提供一种手段，扩大和更充分地整合大学在结构确定领域的研究和教育任务。区域检测器使超细胞和不匹配结构的快速识别成为可能，数据收集时间短，通量高，并且大大改善了衍射和晶体学教学概念的途径。将区域检测器的高通量与低温和高温设备相结合，为目前无法获得的可变温度测量提供了机会。无机材料的结构可以在低温和高温下测定，以建立晶体结构与热膨胀、电学或光学性质之间的关系，而弱衍射或热不稳定的小分子可以在低温下分析，以获得有用的结构信息。此外，本地本科教育机构和公司将通过合作项目获得该工具。