SPECTROSCOPY OPERATIONS FOR XRAY SPECTROSCOPY ON X 9B

该项目的目的是为光谱学提供支持 以确保射束时间的有效利用。这包括 以现场技术援助的形式提供人员支持 工作人员的日常工作，并与 主管(钱斯博士)每周一次。对 矢状聚焦单色仪(如下所述)导致了直接 改进了X9B记录的XAS数据的质量。此外，它还拥有 使用聚焦晶体的XAS用户的HLED(与 HFlat水晶组)目前有66%的几率。焦点句的用法 HBEAM在试件上导致较小的梁尺寸。真空束 热传输管的使用导致了更多的X射线束 被送到样品上，减少了光束的散射 弹性地离开样品保持器：因此荧光的比率 对弹性散射背景的HX射线信号进行了改进。 由于数据质量的提高和使用的透明度 动态聚焦光束现在大多数XAS用户都在收集数据 在此模式下。此外，试件上较小的光束尺寸 意味着需要的贵重材料数量较少。

The purpose of this project is to provide support to spectroscopy users and to insure the efficient usage of beam time. This includes personnel support in the form of technical assistance from on site staff on a daily basis, and consultation and/or collaboration with the Director (Dr. Chance) on a weekly basis. Improvements to the sagittally focusing monochromator (described below) have led to direct improvements in the quality of XAS data recorded at X9B. Also, it has Hled to XAS users utilizing the focusing crystals (as opposed to the Hflat crystal set) 66% of the time currently. The use of a focused Hbeam results in a smaller beam size at the specimen. Vacuum beam Htransport tubes have been used resulting in more of the X-ray beam Hbeing delivered to the specimen and less of the beam scattering elastically off the sample holder: thus the ratio of the fluorescence HX-ray signal to elastically scattered background has been improved. HBecause of the improved data quality and the transparency of usage of Hthe dynamically focused beam most of the XAS users now collect data in Hthis mode. Additionally, the smaller beam sizes at the specimen means Hsmaller quantities of precious materials are required.