100-ELEMENT GE DETECTOR SYSTEM FOR X-RAY ABSORPTION SPECTROSCOPY

用于 X 射线吸收光谱的 100 元件 GE 探测器系统

• 批准号: 7954397
• 负责人: BRITT HEDMAN
• 金额: $ 12.14万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-03-01 至 2010-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7954397
• 关键词: Advisory Committees; Applications Grants; Area; Biological; Collection; Computer Retrieval of Information on Scientific Projects Database; Development; Digital Signal Processing; Electronics; Elements; Fluorescence; Funding; Germanium; Goals; Grant; Individual; Institution; Measurement; Performance; Positioning Attribute; Research; Research Personnel; Resolution; Resources; Roentgen Rays; Sampling; Signal Transduction; Source; Spectrum Analysis; System; United States National Institutes of Health; Work; absorption; base; detector; meetings; programs; structural biology; synchrotron radiation

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. Development work on large-scale detector arrays for XAS measurements reached the performance goals defined in the grant application for the current program period, and a purchase requisition was placed after approval by the SMB Advisory Committee. The detector is for XAS measurements of ultra-dilute biological samples on SSRL?s beam line 9-3. It is based on 100 ea of 5 mm x 5 mm Ge detector elements fabricated as monolithic elements on one substrate crystal. They are therefore spatially arranged without any dead space in between, enhancing the collection area of the fluorescence signal. Having many smaller elements enhances the count-rate capability. With an energy resolution representative of array detectors consisting of individual elements, the performance of this new detector is expected to be outstanding. The monolithic arrangement furthermore enables the detector to be positioned as close as possible to the sample, as it will have a narrow front end. This detector therefore provides the highest collection efficiency in area coverage, within the smallest possible area, meeting both detector performance and geometric requirements. Delivery (from Canberra, Inc.) is expected in early 2009, as is the associated digital signal processing electronics.

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。 用于XAS测量的大规模探测器阵列的开发工作达到了当前计划期间赠款申请中定义的性能目标，并在SMB咨询委员会批准后提出了采购申请。 该检测器用于SSRL上超稀释生物样品的XAS测量？S光束线9-3。它基于100 ea的5 mm x 5 mm Ge探测器元件，作为单片元件制造在一个衬底晶体上。 因此，它们在空间上排列，其间没有任何死区，从而增强了荧光信号的收集区域。 具有许多更小的元件增强了计数率能力。 由于能量分辨率代表了由单个元素组成的阵列探测器，这种新探测器的性能预计将非常出色。 此外，单片布置使得检测器能够尽可能靠近样品定位，因为它将具有窄的前端。 因此，该探测器在尽可能小的面积内提供最高的面积覆盖率，满足探测器性能和几何要求。 交货（来自堪培拉公司）预计在2009年初，因为是相关的数字信号处理电子。