DETECTOR DEVELOPMENT AND UPGRADE

探测器的开发和升级

• 批准号: 8363410
• 负责人: ROBERT M SWEET
• 金额: $ 17.24万
• 依托单位: BROOKHAVEN SCIENCE ASSOC-BROOKHAVEN LAB
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8363410
• 关键词: Address; Aging; Area; Back; Computer software; Crystallography; Data; Development; Funding; Grant; Image; Light; Measures; National Center for Research Resources; Noise; Performance; Photons; Positioning Attribute; Principal Investigator; Program Development; Research; Research Infrastructure; Research Personnel; Resources; Rotation; Source; Specific qualifier value; Switzerland; Synchrotrons; System; Time; United States National Institutes of Health; base; beamline; cost; data reduction; detector; falls; instrument; operation; programs

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Objectives The objectives stated for 2008 renewal of this grant were these: upgrade our two existing Area-Detector Systems Corp. (ADSC) Q315 detectors, initiate the purchase of a modern pixel-array detector (PAD) that is at the state of the art, contribute to and participate in a detector-development program (monolithic, highly-integrated modules). Although they were favorably reviewed, initially we did not receive funding for the last two projects. During this year the NCRR provided a supplement to fund the PAD detector; the detector-development project is still not funded. An additional objective added last year was to obtain a quicker and larger detector to replace the aging Q4r currently in use at X26-C. We managed to borrow a larger and faster one: a Q210 owned by the NSLS and previously at X6-A. We'll soon replace it with the Serial #6 ADSC Q315 recently retrieved from X25. Results  The Pilatus P6M area detector ordered last year from Dectris AG of Baden Switzerland, and paid for with a NCRR supplement, arrived in Feb and was in place at beamline X25 and operating by 1 March 2011. Since that time 32 groups have used it, and have recorded over 100,000 degrees rotation of data. The standard mode of operation is to measure diffraction images in a continuous sweep, with the shutter remaining open and the 3.6ms deadtime being ignored. Note that at X29 data are taken with typical exposure rates of 2 sec/degree of rotation for one-degree images. The beam intensity is about the same, but at X25 the average is 5 sec/degree with 0.5deg. images. We attribute the longer exposure time to the greater difficulty of problems addressed at X25, which is set up for producing an especially small x-ray beam and does not yet have its automounter installed. Plans  We find that, as specified, the P6M is a single-photon-counting, essentially noise-free detector. The expected performance specifications are in the table above. It should be about 80% efficient for 1¿ x-rays. There are several data-reduction programs available for use with this detector. HKL2000 is the standard for other detectors and is the fall-back software for most users. Investigators are getting data that appear to be at least as good as were obtained from the previous CCD-based detector. At the same time that we are exploring how the large size, low noise, and potential for fast framing (up to 10 frames/sec) can give measurably better data with weakly diffracting crystals that have been possible before. Significance  We are in position to exploit the very best diffraction that a crystal can produce at NSLS with the instruments we have in place now. This detector will serve us as we move into NSLS II where we might expect in early days to be collecting data ten to twenty times as quickly.

该副本是利用资源的众多研究子项目之一 由NIH/NCRR资助的中心赠款提供。对该子弹的主要支持 而且，副投影的主要研究员可能是其他来源提供的 包括其他NIH来源。列出的总费用可能 代表subproject使用的中心基础架构的估计量， NCRR赠款不直接向子弹或副本人员提供的直接资金。 目的是2008年续签的对象是：升级我们的两个现有的区域检测系统系统公司（ADSC）Q315探测器，启动购买现代像素阵列检测器（PAD），该检测器（PAD）是在艺术状态下，对艺术状态，对并参与了一个探测器开发计划（单层，高度集成的模式）。尽管经常进行审查，但最初我们没有为最后两个项目获得资金。在这一年中，NCRR提供了资助PAD探测器的补充。探测器开发项目仍然没有资助。 去年增加的另一个目标是获得更快，更大的检测器，以替代当前在X26-C上使用的老化Q4R。我们设法借用了更大，更快的速度：NSLS拥有的Q210，以前是X6-A。我们很快将用最近从X25检索到的序列号＃6 ADSC Q315。 结果，去年从瑞士Baden Dectris AG下令采购的Pilatus P6M面积检测器，并用NCRR补充剂付款，并于2月份到达，并在Beamine X25到位，并于2011年3月1日在Beamine X25上运行。自那时32个小组使用了它，并记录了超过100,000个数据旋转数据。标准操作模式是在连续的扫描中测量衍射图像，其快门保持打开状态，而3.6ms的死时间被忽略。请注意，在x29数据时，以2秒的典型暴露率/旋转度的典型暴露率用于一级图像。光束强度大致相同，但是在x25时，平均值为5秒/度，为0.5维。图像。我们将较长的曝光时间归因于X25解决的问题的更大难度，该问题是为生产特别小的X射线梁而设置的，并且尚未安装其自动驾驶。 计划我们发现，如指定的，P6M是单光子计数，本质上是无噪声的检测器。预期性能规范在上表中。 1 X射线应大约80％。该检测器有几种可用于使用的数据还原程序。 HKL2000是其他探测器的标准，是大多数用户的倒塌软件。研究人员的数据似乎至少与以前基于CCD的检测器获得的数据一样好。同时，我们正在探索大小，低噪声和快速框架（最多10帧/秒）的潜力如何，可以为以前有可能具有较弱的衍射晶体提供更详细的数据。 重要性我们可以利用晶体可以在NSL上产生的最佳衍射，并使用我们现在拥有的仪器。当我们进入NSLS II时，该探测器将为我们服务，我们可能希望在早期收集数据至二十倍。