IMPROVEMENT OF X-RAY BEAM POSITION STABILITY FOR THE BL4-2 SAXS FACILITY

这个子项目是许多利用资源的研究子项目之一 由NIH/NCRR资助的中心拨款提供。次级项目的主要支助 子项目的主要研究者可能是由其他来源提供的， 包括其他NIH来源。 列出的子项目总成本可能 表示子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 在上一个赠款年度安装的反射镜俯仰反馈系统今年进行了重大修改。 以前的版本使用钛涂层刀片材料的信号刀片，这创造了一个高背景水平在小散射角。一个新的真空兼容的住房建成纳入非电镀，抛光铍叶片。 这已在束线处调试并提供所需的束流稳定性。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. A mirror pitch feedback system that was installed during the previous grant year was significantly modified this year. The previous version utilized a Ti coated blade material for the signal blades, which created a high back ground level at small scattering angles. A new vacuum compatible housing was built incorporating un-plated, polished beryllium blades. This has been commissioned at the beam line and provides the desired beam stability.