PDF(Pubmed)
Abstract：
The unique diffraction geometry of ESRF beamline ID06-LVP offers continuous static 2D or azimuthally resolving data collections over all accessible solid angles available to the tooling geometry. The system is built around a rotating custom-built Pilatus3 CdTe 900k-W detector from Dectris, in a configuration equivalent to three butted 300k devices. As a non-standard geometry, here the method of alignment, correction and subsequent integration for any data collected over all solid angles accessible, or over any azimuthal range contained therein, are provided and illustrated by parameterizing and extending existing pyFAI routines. At 1° integrated intervals, and typical distances (2.0 m), the system covers an area of near 2.5 m2 (100 Mpx square equivalent), to 0.65 Å resolution, at 53 keV from a total dataset of some 312 Mpx. Standard FWHMs of SRM660a LaB6 vary from 0.005° to 0.01°, depending on beam size, energy and sample dimensions, and are sampled at an elevated rate. The azimuthal range per static frame ranges from <20° to ∼1° over the full range of the detector surface. A full 2θ-intensity data collection at static azimuth takes 1-3 s typically, and can be reduced to ms-1 rates for measurements requiring time-rate determination. A full solid-angle collection can be completed in a minute. Sample detector distances are accessible from 1.6 m to 4.0 m.
摘要：
ESRF光束线ID06-LVP的独特衍射几何提供了连续的静态2D或方位角解析数据收集在所有可访问的立体角可用的工具几何。该系统围绕Dectris的旋转定制Pilatus3CdTe900k-W探测器构建，在相当于三个对接300k设备的配置中。作为非标准几何，这里的对齐方法，对在所有可访问的立体角上收集的任何数据进行校正和后续积分，或在其中包含的任何方位角范围内，通过参数化和扩展现有的pyFAI例程来提供和说明。以1°积分间隔，和典型距离(2.0米)，系统占地面积接近2.5m2（相当于100Mpx平方），到0.65的分辨率，在大约312Mpx的总数据集中为53keV。SRM660aLaB6的标准FWHM在0.005°至0.01°之间变化，根据光束的大小，能量和样品尺寸，并以较高的速率采样。每个静态帧的方位角范围在探测器表面的整个范围内从<20°到~1°。在静态方位角处收集完整的2θ强度数据通常需要1-3s，并且对于需要时间速率确定的测量可以降低到ms-1速率。一个完整的立体角收集可以在一分钟内完成。样品检测器的距离可从1.6m到4.0m。
