Chai Shuo, Zhu WanQian, Zhang ZhanFei, Zhang LiMin, Xue Song
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Rev Sci Instrum. 2024 Mar 1;95(3). doi: 10.1063/5.0191196.
To enhance the stability of the water-cooled double-crystal monochromator used at the BL17B beamline of the Shanghai Synchrotron Radiation Facility (SSRF), a study was conducted to optimize its cooling system's flow-induced vibration. Through simulation and experimental verification, the researchers analyzed the vibration mechanism and implemented improvement measures. The results indicate that the elastic bellows greatly amplify flow-induced vibration, transmitting it to the first-crystal. By positioning the bellows closer to the crystal, the relative pitch angular vibration of the double-crystal was reduced by 17.5%, and the roll angular vibration decreased by 6.1%. Furthermore, changing the flow rate from 3 to 2.4 l/min further diminished the relative pitch angular vibration by 6.0% and the roll angular vibration by 7.9%. By effectively reducing flow-induced vibration in the water-cooled double-crystal monochromator, equipment stability is enhanced, and the relative angular vibration of the double-crystal has been reduced. This research provides a valuable method and approach for optimizing the stability of the monochromator and related equipment.
为提高上海同步辐射装置（SSRF）BL17B光束线使用的水冷双晶单色仪的稳定性，开展了一项研究以优化其冷却系统的流致振动。通过模拟和实验验证，研究人员分析了振动机理并实施了改进措施。结果表明，弹性波纹管极大地放大了流致振动，并将其传递至第一晶体。通过将波纹管放置得更靠近晶体，双晶的相对俯仰角振动降低了17.5%，滚动角振动降低了6.1%。此外，将流速从3升/分钟改为2.4升/分钟，进一步使相对俯仰角振动降低了6.0%，滚动角振动降低了7.9%。通过有效降低水冷双晶单色仪中的流致振动，提高了设备稳定性，并降低了双晶的相对角振动。该研究为优化单色仪及相关设备的稳定性提供了有价值的方法和途径。
