Shevyrtalov Sergey, Barannikov Alexander, Palyanov Yurii, Khokhryakov Alexander, Borzdov Yurii, Sergueev Ilya, Rashchenko Sergey, Snigirev Anatoly
International Research Center, Coherent X-ray Optics for Megascience Facilities, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russian Federation.
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russian Federation.
J Synchrotron Radiat. 2021 Jan 1;28(Pt 1):104-110. doi: 10.1107/S1600577520014538.
In this manuscript, characterization of single-crystalline (111) plates prepared from type-Ib diamonds with a nitrogen content of 100-150 ppm by means of high-resolution rocking-curve imaging (RCI) is reported. Contrary to common opinion regarding the intrinsically poor diffraction quality of type-I diamonds, RCI showed the presence of nearly defect-free areas of several millimetres squared in the central part of the diamond plates. The observed broadening of the rocking curves is a result of the cutting and polishing processes, causing strains around the edges of the plates and rare defects. An improvement of the preparation technique will thus allow single-crystalline diamond plates to be made for Laue and Bragg monochromators and beam splitters from type-Ib material with areas large enough to be used as optical elements at fourth-generation synchrotron facilities.
在本论文中，报道了通过高分辨率摇摆曲线成像（RCI）对由氮含量为100 - 150 ppm的Ib型金刚石制备的单晶（111）板的表征。与关于I型金刚石本质上衍射质量差的普遍观点相反，RCI显示在金刚石板的中心部分存在几平方毫米的几乎无缺陷区域。观察到的摇摆曲线展宽是切割和抛光过程的结果，这会在板的边缘周围产生应变和罕见缺陷。因此，制备技术的改进将使利用Ib型材料制造用于劳厄和布拉格单色仪以及分束器的单晶金刚石板成为可能，这些板的面积足够大，可在第四代同步加速器设施中用作光学元件。
