MICRODIFFRACTION DEVELOPMENT

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 我们已经完成了以下与用于微衍射应用的biocat微探针相关的开发。 设计了一种新的在线对准系统，以允许用最少的移动部件进行样品定位。新系统由一个1/4英寸的棱镜组成，它将样品图像反射到位于光路外90度的摄像机上。摄像机焦点用作样品对准的参考点。这种新的可视化系统允许执行样品定位和对准程序，而无需从光束路径中移除CCD检测器和飞行管。 安装并调试了一组新的KB反射镜（芝加哥大学设计），每个200 mm长。新的反射镜的特点包括：大接受角，增加了三倍的交付通量;更好的光学表面，将提供更小的光束下降到2微米和弯曲系统控制的步进电机，将允许修改焦点尺寸更准确。对于微衍射应用，新系统允许在各种焦距下聚焦，以管理不同的光束发散情况，易于设置和高再现性。

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.