1-D Silicon Detector for Synchrotron XRD

用于同步加速器 XRD 的一维硅探测器

• 批准号: 6833071
• 负责人: Carolyn Rossington Tull
• 金额: $ 11.72万
• 依托单位: PHOTON IMAGING, INC.
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6833071
• 关键词: X ray crystallography; biomedical device power system; biomedical equipment; biomedical equipment development; data collection; evaluation /testing; high throughput technology; method development; noise; radionuclides; silicon; synchrotrons

DESCRIPTION (provided by applicant): We will develop a new one-dimensional (l-D) silicon strip detector, and the accompanying integrated circuit pulse-processing electronics, for high-speed synchrotron powder diffraction experiments. Synchrotron 1-D diffraction techniques are powerful tools in elucidating the crystalline structure of many materials, including biomaterials and pharmaceuticals. This new detector will replace the currently used point detectors (semiconductor and scintillator/PMT detectors) and will provide at least 1-2 orders of magnitude improvement in data collection speed. The new detector, with ~ 0.1 mm spatial resolution, will be able to collect a large portion of the diffraction pattern at one time instead of point-by-point as is currently done, and will provide good energy resolution for discrimination of the diffracted and fluoresced photopeaks. The increase in data collection speed will not only increase sample throughput and take advantage of the increase in photon flux in the new third generation synchrotron beamlines, but will also open up new realms of experiments in the time domain. In Phase I, we will evaluate a prototype silicon strip detector, coupled to a new low-noise amplifier ASIC (application specific integrate circuit) recently developed by Brookhaven National Laboratory (BNL), for the 1- D diffraction applications. The electronic noise, energy resolution, and high count rate performance will be evaluated with radioisotope sources in the 5- 25 keY range, and with a high count x-ray generator producing 8 keV x-rays. In Phase II, the ASIC will be modified for optimization for this diffraction application in collaboration with BNL staff. Full detector modules will be designed and constructed consisting of 2x2 cm2 multi-channel strip detector arrays, wire-bonded to the multi-channel ASICs, and will include readout control of ASICs and data acquisition software. Several detector modules will be tiled together to form a complete linear array covering a ~40 degree angle in the 2-theta diffraction space. The detector prototype will be evaluated in diffraction applications at the National Synchrotron Light Source (at BNL) and the Stanford Synchrotron Radiation Laboratory.

描述（由申请人提供）：我们将开发一种新的一维（1-D）硅条检测器，以及配套的集成电路脉冲处理电子设备，用于高速同步粉末衍射实验。同步加速器一维衍射技术是阐明许多材料（包括生物材料和药物）晶体结构的有力工具。这种新的探测器将取代目前使用的点探测器（半导体和闪烁体/PMT探测器），并将提供至少1-2个数量级的数据收集速度的提高。新探测器的空间分辨率约为0.1 mm，将能够一次收集大部分衍射图案，而不是像目前那样逐点收集，并将为衍射和荧光峰的区分提供良好的能量分辨率。数据采集速度的提高不仅将增加样品吞吐量，并利用新的第三代同步加速器光束线中光子通量的增加，而且还将开辟时域实验的新领域。 在第一阶段，我们将评估一个原型硅条检测器，耦合到一个新的低噪声放大器ASIC（专用集成电路）最近开发的布鲁克海文国家实验室（BNL），1- D衍射应用。电子噪声、能量分辨率和高计数率性能将使用5- 25 keY范围内的放射性同位素源和产生8 keV X射线的高计数X射线发生器进行评估。在第二阶段，ASIC将与BNL工作人员合作进行修改，以优化这种衍射应用。完整的探测器模块将被设计和构建，包括2x2 cm 2多通道条带探测器阵列，引线键合到多通道ASIC，并将包括ASIC的读出控制和数据采集软件。几个探测器模块将平铺在一起，形成一个完整的线性阵列，覆盖2 θ衍射空间中的~40度角。探测器原型将在国家同步加速器光源（在BNL）和斯坦福大学同步辐射实验室的衍射应用进行评估。