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

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 用于XAS测量的大型探测器阵列的开发工作达到了本方案期间赠款申请中规定的绩效目标，并在中小企业咨询委员会批准后提出了采购申请。该探测器用于在上海同步辐射实验室S束线9-3上进行超稀释生物样品的X射线吸收光谱测量。它基于100EA的5 mm x 5 mm Ge探测器元件，作为单片元件制作在一个衬底晶体上。因此，它们在空间上排列，其间没有任何死隙，从而增强了荧光信号的收集区域。拥有许多更小的元件可以增强计数速率能力。由于阵列探测器的能量分辨率由单个元件组成，这种新探测器的性能有望出类拔萃。单片结构还使检测器能够定位为尽可能靠近样品，因为它将具有窄的前端。交货(来自堪培拉，Inc.)2009年夏季举行了一次会议，随后进行了广泛的软件和校准硬件开发。探测器目前正在调试中。

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. Delivery (from Canberra, Inc.) took place in summer 2009 and extensive software and alignment hardware developments has ensued. The detector is currently in commissioning.