SPECTROSCOPY OPERATIONS FOR XRAY SPECTROSCOPY ON X 9B

X 9B 上 X 射线光谱的光谱操作

• 批准号: 6120371
• 负责人: MARK R CHANCE
• 金额: $ 6.73万
• 依托单位: ALBERT EINSTEIN COLLEGE OF MEDICINE
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-30 至 1999-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6120371
• 关键词: biomedical equipment development; biomedical resource; building /facility design /renovation; enzymes; proteins; spectrometry; technology /technique

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.

本项目的目的是为光谱学提供支持 并确保波束时间的有效使用。 这包括 现场技术援助形式的人员支持 工作人员的日常工作，并与 Chance博士每周一次。 改进 弧矢聚焦单色器（下面描述）已经导致直接 在X9B记录的XAS数据质量的改进。 此外，它还 Hled到XAS用户利用聚焦晶体（而不是 H平面晶体设置）66%的时间目前。 使用焦点 Hbeam导致样品处的光束尺寸较小。 真空束 由于使用了H传输管， 光束被传递到样品， 弹性地离开样品保持器：因此， 弹性散射背景的HX射线信号得到改善。 H由于数据质量的提高和 大多数XAS用户现在都使用动态聚焦光束来收集数据 在HThis模式下。 此外，试样处的较小光束尺寸 意味着所需的贵重材料数量较少。