液氮冷却劳厄晶体单色器的热力耦合研究  

Study on thermal mechanical coupling of Laue crystal monochromator cooled by LN

作　　者：王佳怡[1] 高立丹[1] 贾全杰[1] 杨一鸣 程虎 洪振[1] Wang Jiayi;Gao Lidan;Jia Quanjie;Yang Yiming;Cheng Hu;Hong Zhen(Institute of High Energy Physics,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《低温与超导》2022年第5期47-51,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金(12105309、E211835C10)资助。

摘　　要：针对高能同步辐射光源工程材料线站研制的劳厄晶体单色器上受光压弯晶体光学元件,利用有限元方法模拟计算了具有各向异性和低温材料非线性的硅晶体的压弯面形和热变形,计算结果显示硅晶体精确三维点云体载荷的最高温低于面吸收并且体吸收的热变形呈现出非对称性,同时精确给出了压弯和热变形导致晶体变形数据,为束线后续衍射动力学追迹模拟评估对光斑性能的影响提供更加真实可靠的保证。For the optical element with thermal and bending of Laue crystal monochromator from the engineering material beamline in the light of high energy synchrotron radiation, the bending surface shape and thermal deformation of silicon crystal with anisotropy and low temperature material nonlinearity were simulated by finite element method. The calculation results show that the maximum temperature of silicon crystal by accurate three-dimensional point cloud body load is lower than the surface absorption, and the thermal deformation of volume absorption presents asymmetry. At the same time, the lattice deformation data caused by bending and thermal deformation are accurately given. It provides a more real and reliable guarantee for the influence on the spot performance by diffraction dynamics tracing.

关 键 词：劳厄单色器 体吸收 压弯 热变形 

分 类 号：TK124[动力工程及工程热物理—工程热物理]