【作者】 邓小国；

【导师】 熊仁生； 周泗忠；

【作者基本信息】 中国科学院研究生院（西安光学精密机械研究所） ， 光学工程， 2008， 博士

【摘要】 随着上海第三代同步辐射光源(SSRF)光束线工程的建设,作为光束线关键设备之一的高精度晶体单色器需求数量将达到几十台。而涉及诸多关键技术的高精度晶体单色器,目前还主要依赖从国外进口,所以自行研制高精度的晶体单色器势在必行。本论文将在上海光源X射线衍射光束线(BL1481)和小角散射光束线(BL1681)中的水冷弧矢聚焦单色器研制过程中,主要从以下几个方面对高精度晶体单色器的若干关键技术进行了研究。1.探讨了高热负载热缓释技术中不同冷却介质和不同冷却结构,分析了晶体热载变形对单色器的能量分辨影响,归纳总结了各自的优缺点,提出了第一晶体高精度定向切槽、扩散焊接特殊加工技术,降低了晶体热载变形,提高了晶体的衍射面面形精度及衍射性能。2.为提高实验站样品处光斑的通量,深入分析了晶体压弯聚焦机构的特点,提出了柔性铰链传递弯矩进行晶体弯曲聚焦技术,实现了光束的水平聚焦,使单色器能够接收较大发散度的入射光束,提高了样品处的光子通量。3.针对光束线对单色器的高可靠性和高稳定性要求,分析了晶体偏离理想位置给Bragg衍射带来的影响,提出了晶体投角、滚角和摆角精密微调及固定出口技术,以获得高精度的光斑位置。4.在前面几章的理论研究基础之上,将理论成果应用到水冷弧矢聚焦单色器的工程实践中。以线站对单色器性能指标要求为设计目标,采用有限元分析软件对晶体结构参数进行了优化设计,解决了晶体直接水冷却、弧矢压弯聚焦、固定光束出射口和精密微调机构等关键技术问题,研制成功了国内第一台运用于工程中的水冷弧矢聚焦双晶单色器,其主要技术指标达到或超过国际同类设备的水平,已在上海光源调试成功,投入使用。更多还原

【Abstract】 Many high precision double crystal monochromators（DCM） will be needed in the SHANGHAI 3^rd generation synchrotron radiation beamlines, with the Projects being construction.However.High precision DCM involved several key techniques has been imported from foreign country at present.So the developing of high precision DCM dependent ourselves in internal is imperative under the situation.In this dissertation, several key techniques of high precision DCM are presented on the development of sagittal focusing DCM with direct water cooling will be used in the BL14B1 and BL16B1 of SSRF.They are includes several aspects:Firstly,different cooling mediums and different structures for High Heat-load cooling technology have been discussed,influence of deformance due High Heat-load for energy resolution of DCM has been analysed,fault&default of mediums and structures’ have been summarized,high precision direction incision and diffusion banding technology for Si crystal had been puts forward,deformance due High heat-load had been minished,and diffraction surface precision and diffracted performance of crystal had been advanced.Secondly ,bending focusing mechanism had been deeply analysed in order to increasing beam flux,bending focusing technology using hinge passed bending moment had been put forward,horizontal focused beam had been achieved,divergence of incidence beam of DCM had been enlarged,energy resolution of monochromatic beam had been increased.Thirdly,aimed at high reliability and stability requirement of DCM,influence of crystal deviation from ideal position for Bragg diffraction had been analysed,precision pitch,roll,and yaw adjustment and Fixed-exit technologies had been put forward,in order to achieving high precision beam position.On the basis of the theory of ahead charpters, sagittal focusing double crystal monochromator with direct water cooling has been designed and manufactured used to X-Ray diffraction beamline.Aimed to the requirements of monochromator performance,structure parameters of crystal had been optimized by FEA ,several key techniques had been solved,such directed water cooling of crystal,saggital bending focusing,Fixed-exit,and precision adjustment mechanism.The first saggital focusing and directed water cooling DCM used in project had been successfully developed and manufactured in internal,the main technic indexs had been achieved or exceeded the level of international congeneric equipments.更多还原