The High Resolution Powder Diffraction Beam Line at ESRF.
The High Resolution Powder Diffraction Beam Line at ESRF.
复制标题
DOI：
10.6028/jres.109.010
复制
发表时间：
2004-01
影响因子：
1.5
通讯作者：
Fitch AN
中科院分区：
文献类型：
--
作者：
Fitch AN
讨论并说明了 ESRF 高分辨率粉末衍射光束线 BM16 的光学设计和性能。介绍了最近在 BM16 上进行的一些研究，包括晶体结构求解和细化、反常散射、原位测量、工程部件中的残余应变、微观结构研究以及表面层的掠入射衍射。束线建立在弯曲磁铁上，工作能量范围为 5 keV 至 40 keV。 2002 年转向波荡器源后，它将受益于高达 60 keV 的扩展能量范围以及更高的通量和分辨率。预计将实现数据质量的提高，从而解决更大的晶体结构，并提高精细结构的准确性。系统地利用各向异性热膨胀将有助于减少粉末衍射数据分析中峰重叠的影响。
The optical design and performance of the high-resolution powder diffraction beam line BM16 at ESRF are discussed and illustrated. Some recent studies carried out on BM16 are described, including crystal structure solution and refinement, anomalous scattering, in situ measurements, residual strain in engineering components, investigation of microstructure, and grazing-incidence diffraction from surface layers. The beam line is built on a bending magnet, and operates in the energy range from 5 keV to 40 keV. After the move to an undulator source in 2002, it will benefit from an extented energy range up to 60 keV and increased flux and resolution. It is anticipated that enhancements to the data quality will be achieved, leading to the solution of larger crystal structures, and improvements in the accuracy of refined structures. The systematic exploitation of anisotropic thermal expansion will help reduce the effects of peak overlap in the analysis of powder diffraction data.