MICRODIFFRACTION DEVELOPMENT

微衍射开发

• 批准号: 7954917
• 负责人: RAUL BARREA
• 金额: $ 1.32万
• 依托单位: ILLINOIS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7954917
• 关键词: Biophysics; Characteristics; Chicago; Computer Retrieval of Information on Scientific Projects Database; Development; Funding; Grant; Image; Imagery; Institution; Motor; Optics; Positioning Attribute; Procedures; Reproducibility; Research; Research Personnel; Resources; Sampling; Source; Surface; System; Time; Tube; United States National Institutes of Health; Universities; design; detector

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. We have performed the following developments related to the biocat microprobe for micro diffraction applications. A new inline alignment system was designed to allow sample positioning with minimum moving parts. The new system consists of a ¿ inch prism that reflects the sample image on a video camera located at 90 degree, out of the beam path. The camera focal point is used as a reference point for sample alignment. This new visualization system allows performing the sample positioning and alignment procedure without removing the CCD detector and flight tube from the beam path. A new set of KB mirrors (University of Chicago design) 200 mm long each were installed and commissioned. The new mirrors characteristics include: large acceptance angle that increase the delivered flux up to three times; better optical surfaces that will deliver smaller beams down to 2 microns and bender system controlled by stepper motors that will allow modifying focal size more accurately. For microdiffraction applications the new system allows focusing at various focal distances to manage different beam divergence scenarios, with easy setup and high reproducibility.

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 我们对用于微衍射应用的Biocat微探针进行了以下开发。 设计了一种新的在线对准系统，允许使用最少的移动部件进行样品定位。新系统由一个英寸棱镜组成，该棱镜将样本图像反射到位于90度角的摄像机上，远离光路。相机焦点被用作样本对齐的参考点。这一新的可视化系统允许执行样品定位和对准程序，而无需从光束路径上移除CCD探测器和飞行管。 安装并调试了一套新的KB反射镜(芝加哥大学设计)，每个反射镜长200毫米。新型反射镜的特点包括：接收角度大，可将传输通量提高三倍；更好的光学表面，可将较小的光束传输至2微米；以及由步进电机控制的折弯系统，可更精确地调整焦距。对于微衍射应用，新系统允许在不同的焦距进行聚焦，以管理不同的光束发散情况，设置简单，重复性高。