MICROXAS IMAGING SYSTEM FOR BL 6-2

该子项目是利用NIH/NCRR资助的中心赠款提供的资源的许多研究子项目之一。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。所列机构为中心机构，不一定为研究者机构。来自Xradia Inc.去年在BL 6 -2上以虚拟源配置进行了调试。XAS成像的亚微米聚焦使用两个Rh涂覆的可调节KB反射镜以交叉几何形状获得，用于垂直和水平聚焦，每个反射镜具有独立的弯曲机构以设置所需的表面图形。光学器件被封闭在He气氛中，减少吸收和散射。安装在第一垂直聚焦KB反射镜下游的高精度狭缝孔径使得能够设置光学器件的拦截光束尺寸，并且允许通过探测反射镜表面的不同区域和位置来将聚焦通量与光斑尺寸进行交换。在这一点上，光束的尺寸从2 × 3到15 × 11（horz × vert微米^[2]）不等。

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. A commercial Kirkpatrick-Baez (KB) mirror system from Xradia Inc. was commissioned on BL6-2 in a virtual source configuration last year. Sub-micrometer focusing for XAS imaging is obtained using two Rh coated adjustable KB mirrors in a crossed geometry for vertical and horizontal focusing, each with a self-contained bending mechanism to set the desired surface figure. The optics has been enclosed in a He atmosphere, reducing absorption and scatter. A high precision slit aperture mounted downstream of the first vertically focusing KB mirror enables setting the intercepted beam size of the optics, and allows trading focused flux for spot size by probing different areas and locations of the mirror surface. Beam sizes ranging from 2 x 3 to 15 x 11 (horz x vert micrometer^2) have been achieved at this point.