First results are presented for synchrotron radiation diffraction in a paratellurite (TeO₂) single crystal investigated with a new experimental scheme consisting of a standard monochromator and a relatively narrow slit for collimation and monochromatization of an incident beam. The Bragg case reflection geometry is used. The monochromator, a pair of Si crystals, maintains the initial direction of the beam propagation. The theory is developed for a precise description of the instrumental function in such a scheme. A new rocking curve registration technique with use of an adaptive bending piezoactuator is applied for the first time with the aim to record the narrow diffraction peaks with high accuracy. A sample is attached to one edge of the bidomain lithium niobate single crystal piezoactuator used. The piezoactuator is bent under the influence of an electric field and it changes the angular position of the sample with a very small step. The experimental curves are compared with the calculated diffraction rocking curves of a perfect paratellurite crystal, both the theoretical one and the one calculated taking into account the instrumental function. An instrumental function account allows a complete coincidence of the simulated curves with the experimental results to be obtained if the experimental curve does not coincide with the theoretical rocking curve. A small discrepancy between the theory and the experimental data has been discovered in cases where the incident beam is sufficiently collimated and monochromated. This indicates the presence of a certain number of lattice defects in the sample under study.

中文翻译：

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用新的实验方案研究星云单晶中的同步辐射衍射

提出了副星（TeO _2）中同步辐射衍射的初步结果。）用新的实验方案研究的单晶，该方案由标准单色仪和相对窄的狭缝组成，用于准直和单色化入射光束。使用了布拉格案例反射几何。单色仪是一对Si晶体，可保持光束传播的初始方向。开发该理论以精确描述这种方案中的仪器功能。首次应用一种新的采用自适应弯曲压电致动器的摇摆曲线配准技术，旨在高精度记录窄衍射峰。将样品附着在所使用的双畴铌酸锂单晶压电致动器的一个边缘上。压电致动器在电场的作用下弯曲，并以很小的步长改变样品的角位置。将实验曲线与理想的星云石晶体的计算的衍射摇摆曲线进行了比较，理论上的曲线和考虑到仪器功能的曲线均得到了比较。如果实验曲线与理论摇摆曲线不一致，则仪器功能帐户可以使模拟曲线与实验结果完全重合。在入射光束被充分准直和单色化的情况下，已经发现理论和实验数据之间的微小差异。这表明所研究的样品中存在一定数量的晶格缺陷。理论值和计算值都考虑了工具功能。如果实验曲线与理论摇摆曲线不一致，则仪器功能帐户可以使模拟曲线与实验结果完全重合。在入射光束被充分准直和单色化的情况下，已经发现理论和实验数据之间的微小差异。这表明所研究的样品中存在一定数量的晶格缺陷。理论值和计算值都考虑了工具功能。如果实验曲线与理论摇摆曲线不一致，则仪器功能帐户可以使模拟曲线与实验结果完全重合。在入射光束被充分准直和单色化的情况下，已经发现理论和实验数据之间的微小差异。这表明所研究的样品中存在一定数量的晶格缺陷。在入射光束被充分准直和单色化的情况下，已经发现理论和实验数据之间的微小差异。这表明所研究的样品中存在一定数量的晶格缺陷。在入射光束被充分准直和单色化的情况下，已经发现理论和实验数据之间的微小差异。这表明所研究的样品中存在一定数量的晶格缺陷。