Sapphire hard X‐ray Fabry–Perot resonators for synchrotron experiments |
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| Authors: | 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 Shih-Lin Chang |
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| Institution: | 1. Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan;2. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan;3. Institute of NanoEngineering and MicroSystems, National Tsing Hua University, Hsinchu 300, Taiwan |
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| Abstract: | 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. |
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| Keywords: | sapphire Fabry– Perot resonator coherent X‐rays backward diffraction dynamical diffraction high‐resolution monochromator |
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