Modular CCD-based Detector for X-ray Crystallography at Synchrotron Beamlines

该项目的总体目标是成功地使用x射线晶体学探测器。这将通过(a)开发基于模块化CCD的x射线探测器来完成，该探测器旨在收集国家同步加速器光源的摆动光束线上蛋白质晶体的数据，以及(b)研究x射线晶体学的探测器技术。本项目有四个主要组成部分：(1)探测器的设计和建造，(2)探测器性能的表征，(3)探测器的安装和X21和/或X25光束线的数据收集，以及(4)探测器硬件和x射线衍射探测器使用方法的研究。该探测器将能够在同步加速器光束线的最高通量下准确记录衍射图样。该探测器包括控制和数据分析软件。该探测器的主要特点包括：符号215 \f“符号”A模块化设计：探测器由4个模块单元组成的阵列组装而成。每个单元的活动面积为~100x100mm正方形。4个模块形成200x200mm的面积，像素为~2000x2000。符号215 \f“符号”可互换模块：模块可以快速互换，允许以最小的波束时间损失快速更换有缺陷的模块。SYMBOL 215 \f“SYMBOL”高性能：动态范围为4x104；DQE ~0.7。同步加速器操作的“符号”优化：连续图像之间的死区时间（读出时间）为0.8秒。像素分帧可用于更快的读出和/或更有效的数据输出和数据存储。“SYMBOL”高可靠性和稳定性：x射线转换器和CCD传感器使用光纤锥度消磁器直接耦合，消除了对图像增强器和镜头的需要。“SYMBOL”由多源组件制造：可编程，低噪声电子设备能够与多种类型的ccd一起工作；光纤锥和ccd可从多个来源获得；VME系统和基于UNlX的计算机将用于数据采集和探测器控制。SYMBOL 215 \f“SYMBOL”软件；探测器校准和控制所需的所有例程将集成到一个图形导向的包中。MADNES的修改版本将用于振荡数据的收集。将对探测器的性能进行广泛的表征，以确定(a)如何最好地使用探测器进行数据收集和(b)如何推进探测器技术。将研究所使用的每种组件和新组件的特性，以提高该探测器和未来探测器的性能。将进行研究，以确定用这种探测器进行的测量如何影响从探测器数据得出的分子结构。将发展反卷积数据的数学方法，以提高用x射线晶体学探测器进行的强度测量的准确性。该项目将补充布鲁克海文国家实验室生物系提交给能源部健康与环境研究办公室（OHER）的一项提案。布鲁克海文的提案将提供辅助硬件，以完成国家实验室国家同步加速器光源的蛋白质晶体学工作光束线数据收集设施。OHER项目将提供一个用于安装探测器的衍射仪，一个用于校准衍射仪的电动升降台，这些组件的控制仪器，数据简化计算机和大量存储设备，以及足够的人员操作仪器，作为没有经验的外部用户的设施。探测器将作为该设施的主要仪器安装。该设施将被建造成可移动的，这样它就可以与国家同步加速器光源的任何摆动或偶极子光束线一起使用。目标将是提供足够科学质量的项目，使仪器将在大部分时间内使用。~CRD3809TMP ~CAL165BTMP ~ Lrz ~CRD105ATMP # ~CAL0E32TMP ！xz ~CRD081DTMP $xz ~CAL3B02TMP Z~ Z~ CRD351BTMP ~ Z~ DOC0333TMP %G ~CRD2216TMP i~ ~MF2E00 TMP t ~CAL1B21TMP N9 9321872 Phillips项目的总体目标是成功使用探测器进行x射线晶体学。这将是12 H J &amp；(？4 5 6 $ % & E # &amp；' = ？H - @ B / 1 $ & ~ d _!!v & p @ p ！!% & p @ p ！!@ & p @ p ！!& p @ p ！!& p @ p ！!!!!F x 3 Times New Roman Symbol & Arial 1 Courier @ W ' W 9 9 9 9 9 9 " h % E% E F i = abstract Deseree King, BIR Deseree King， BIR

9321872 Phillips The overall objective of the project is the successful use of detectors for x ray crystallography. This will be accomplished by (a) the development of a modular CCD based x ray detector designed to collect data from protein crystals at wiggler beam lines at the National Synchrotron Light Source, and (b) research on detector technology for x ray crystallography. This project has four main components: (1 ) design and construction of the detector, (2) characterization of the performance of the detector, (3) installation of the detector and data collection at beamlines X21 and/or X25, and (4) research on detector hardware and on methods for using detectors for x ray diffraction. This detector will be capable of recording diffraction patterns accurately at the highest fluxes available at synchrotron beam lines. The detector includes software for control and data analysis. Major features of the detector include: SYMBOL 215 \f "Symbol" A Modular Design: The detector is assembled from an array of 4 modular units. Each unit has an active area of ~100x100mm square. The 4 modules form an area of 200x200 mm with ~2000x2000 pixels. SYMBOL 215 \f "Symbol" Interchangeable Modules: Modules can be quickly interchanged, allowing the rapid replacement of a defective module with a minimum loss of beam time. SYMBOL 215 \f "Symbol" High Performance: The dynamic range is 4x104; and the DQE ~0.7. SYMBOL 215 \f "Symbol" Optimization for Synchrotron Operation: The dead time between successive images (readout time) is 0.8 seconds. Pixel binning can be used for faster readout and/or more efficient data r educ tion and data storage. SYMBOL 215 \f "Symbol" High Reliability and Stability: The x ray converter and CCD sensor are directly coupled using a fib eroptic taper demagnifier, eliminating the need for image intensifiers and lenses. SYMBOL 215 \f "Symbol" Fabrication from Multi Sourced Components: The programmable, low noise electronics are capa ble of operating with many types of CCDs; the fiberoptic tapers and CCDs are available from sever al sources; a VME system and a UNlX based computer will be used for data acquisition and detec tor control. SYMBOL 215 \f "Symbol" Software; All routines necessary for detector calibration and control will be integrated into a graphi cally oriented package. A modified version of MADNES will be used for oscillation data collection. An extensive characterization of the detector's performance will be carried out in order to deter mine (a) how best to use the detector for data collection and (b) how to advance detector technolo gy. The characteristics of each of the components used, and of new components, will be studied in order to enhance the performance of this detector and future detectors. Studies will be carried out to determine how measurements made with this type of detector influence the molecular struc tures derived from the detector data. Mathematical methods for deconvoluting data will be developed in order to improve the accuracy of intensity measurements made with x ray crystallography detectors. This project will complement a proposal that has been submitted to the Department of Energy, Office of Health and Environmental Research (OHER) by the Brookhaven National Laboratory Biology Department. The Brookhaven proposal will provide ancillary hardware to complete a working beamline data collection facility for protein crystallography at the National Laboratory National Syn chrotron Light Source. The OHER project will provide a diffractometer on which to mount the detector, a motorized lift table for alignment of the diffractomet er, control instruments for these components, data reduction computers and substantial mass storage devices, and sufficient per sonnel to operate the instrument as a facility for inexperienced outside users. The detector will be installed as the principal instrument of the facility. The facility will be built to be mobile so that it can be used with any of the wiggler or dipole beamlines at the National Synchrotron Light Source. A goal will be to provide projects of sufficient scientific quality that the instrument will be in use for a major fraction of the time. ~CRD3809TMP YMx ~CAL165BTMP Lrz ~CRD105ATMP uz # ~CAL0E32TMP !xz ~CRD081DTMP $xz ~CAL3B02TMP Z~z ~CRD351BTMP ~z ~DOC0333TMP %G ~CRD2216TMP i~ ~MF2E00 TMP t ~CAL1B21TMP N9 9321872 Phillips The overall objective of the project is the successful use of detectors for x ray crystallography. This will 1 2 H I J & ' ( ? 4 5 6 $ % & E # & ' = ? H - @ B / 1 $ & ~ d _ ! !v & p @ P ! !% & p @ P ! !@ & p @ P ! ! & p @ P ! ! & p @ P ! ! ! ! ! F x 3 Times New Roman Symbol & Arial 1 Courier @ W ` w 9 9 9 9 9 9 9 " h % E% E f ı = abstract Deseree King, BIR Deseree King, BIR