生命科学x射线散射光束线的扫描结构制图

IF 2.4 3区 物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION
Journal of Synchrotron Radiation Pub Date : 2022-03-01 Epub Date: 2022-01-17 DOI:10.1107/S1600577521013266
Lin Yang, Jiliang Liu, Shirish Chodankar, Stephen Antonelli, Jonathan DiFabio
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引用次数: 0

摘要

介绍了用于支持LiX束线微束结构映射的仪器和软件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Scanning structural mapping at the Life Science X-ray Scattering Beamline.

This work describes the instrumentation and software for microbeam scattering and structural mapping at the Life Science X-ray Scattering (LiX) beamline at NSLS-II. Using a two-stage focusing scheme, an adjustable beam size between a few micrometres and a fraction of a millimetre is produced at the sample position. Scattering data at small and wide angles are collected simultaneously on multiple Pilatus detectors. A recent addition of an in-vacuum Pilatus 900k detector, with the detector modules arranged in a C-shaped configuration, has improved the azimuthal angle coverage in the wide-angle data. As an option, fluorescence data can be collected simultaneously. Fly scans have been implemented to minimize the time interval between scattering patterns and to avoid unnecessary radiation damage to the sample. For weakly scattering samples, an in-vacuum sample environment has been developed here to minimize background scattering. Data processing for these measurements is highly sample-specific. To establish a generalized data process workflow, first the data are reduced to reciprocal coordinates at the time of data collection. The users can then quantify features of their choosing from these intermediate data and construct structural maps. As examples, results from in-vacuum mapping of onion epidermal cell walls and 2D tomographic sectioning of an intact poplar stem are presented.

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来源期刊
CiteScore
5.10
自引率
12.00%
发文量
289
审稿时长
4-8 weeks
期刊介绍: Synchrotron radiation research is rapidly expanding with many new sources of radiation being created globally. Synchrotron radiation plays a leading role in pure science and in emerging technologies. The Journal of Synchrotron Radiation provides comprehensive coverage of the entire field of synchrotron radiation and free-electron laser research including instrumentation, theory, computing and scientific applications in areas such as biology, nanoscience and materials science. Rapid publication ensures an up-to-date information resource for scientists and engineers in the field.
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