Curved Crystal Microfocus X-ray Monochromator

曲面晶体微焦点X射线单色仪

• 批准号: 440455-2013
• 负责人: Schrobilgen, Gary
• 金额: $ 4.77万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507069
• 关键词: Curved; Crystal; Microfocus; ray; Monochromator

This Proposal requests funding for a curved crystal microfocus monochromator which will replace the standard flat graphite monochromator of our Bruker Smart Apex 2 Molybdenum diffractometer. The upgrade will provide an X-ray "hot spot" at the crystal, resulting in up to 7 times the diffracted intensity from very small single crystals, allowing researchers to determine molecular and solid-state structures from samples as small as ca. 0.000004 mm3. The Applicant has consistently pushed the limits of what can be achieved in a chemistry X-ray laboratory. The existing instrumentation and sample preparation techniques have been configured to tackle a wide range of challenging problems. The increased brilliance of the X-ray source will allow the Applicant to obtain molecular structures that were previously unattainable for a large percentage of his air- and thermally sensitive compounds which are, sometime, aggressive oxidizers, and to produce more precise structural models in less time and more economically. In addition to providing access to more and better quality molecular structures, this upgrade will also permit the Applicant and other users of the McMaster X-ray facility (MAX) to obtain high-resolution diffraction data, including detailed diffuse and incommensurate scattering. These scattering features will allow the modeling of short range structural modifications and intergrowth of phases, two factors which can drastically alter the physical properties of materials. One of the mandates of the MAX facility is the hands-on training of graduate students, postdoctoral fellows, and faculty in the use of diffraction methods to solve structural problems. Graduate level courses are offered in the theory and practice of single-crystal and powder diffraction techniques, and course projects generally result in publications. Consequently, new applications and capabilities are constantly being developed and disseminated from the MAX Facility. A state-of-the art microfocus X-ray source with the enhanced capabilities it imparts to the existing Mo diffractometer would also provide training in X-ray crystallography that is up-to-date. The identical upgrade has recently appeared in labs in Canada and has proven to be a worthwhile investment.

该提案要求为弯曲晶体微焦点单色仪提供资金，该单色仪将取代我们的布鲁克智能 Apex 2 钼衍射仪的标准平面石墨单色仪。此次升级将在晶体上提供一个 X 射线“热点”，从而使非常小的单晶的衍射强度提高到 7 倍，从而使研究人员能够从小至约 100 nm 的样品中确定分子和固态结构。 0.000004 毫米3。申请人一直在突破化学X射线实验室所能达到的极限。现有的仪器和样品制备技术已被配置用于解决各种具有挑战性的问题。 X射线源亮度的增加将使申请人能够获得以前无法获得的大部分对空气和热敏感的化合物（有时是腐蚀性氧化剂）的分子结构，并能够在更小的时间内产生更精确的结构模型。时间更经济。除了提供更多和更好质量的分子结构之外，该升级还将允许申请人和麦克马斯特X射线设备(MAX)的其他用户获得高分辨率衍射数据，包括详细的漫射和不相称散射。这些散射特征将允许对短程结构修改和相共生进行建模，这两个因素可以极大地改变材料的物理性质。 MAX 设施的任务之一是对研究生、博士后研究员和教师进行使用衍射方法解决结构问题的实践培训。研究生水平课程提供单晶和粉末衍射技术的理论和实践，课程项目通常会发表。因此，MAX 设施不断开发和传播新的应用程序和功能。最先进的微焦点 X 射线源及其赋予现有 Mo 衍射仪的增强功能也将提供最新的 X 射线晶体学培训。相同的升级最近出现在加拿大的实验室中，并已被证明是一项值得的投资。