Sapphire hard X-ray Fabry-Perot resonators for synchrotron experiments

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• 作者：Yi-Wei Tsai ; Yu-Hsin Wu ; Ying-Yi Chang ; Wen-Chung Liu ; Hong-Lin Liu ; Chia-Hong Chu ; Pei-Chi Chen ; Pao-Te Lin ; Chien-Chung Fu and Shih-Lin Chang
• 关键词：sapphire Fabry&ndash ; Perot resonator ; coherent X-rays ; backward diffraction ; dynamical diffraction ; high-resolution monochromator
• 刊名：Journal of Synchrotron Radiation
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：23
• 期：3
• 页码：658-664
• 全文大小：954K
• ISSN：1600-5775

文摘

Hard X-ray Fabry–Perot resonators (FPRs) made from sapphire crystals were constructed and characterized. The FPRs consisted of two crystal plates, part of a monolithic crystal structure of Al₂O₃, acting as a pair of mirrors, for the backward reflection (0 0 0 30) of hard X-rays at 14.3147 keV. The dimensional accuracy during manufacturing and the defect density in the crystal in relation to the resonance efficiency of sapphire FPRs were analyzed from a theoretical standpoint based on X-ray cavity resonance and measurements using scanning electron microscopic and X-ray topographic techniques for crystal defects. Well defined resonance spectra of sapphire FPRs were successfully obtained, and were comparable with the theoretical predictions.