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简单介绍了弧矢聚焦单色仪的分光原理及结构原理 ,分析了同步辐射弧矢聚焦双晶单色器实际转轴偏离理想转轴ΔS及晶面偏离与导轨的理想夹角Δα对出射光高度的影响 ,并对弧矢聚焦晶体压弯半径的压弯精度Δh对实验站聚焦光斑展宽的作用进行了理论推导。当ΔS≤ 31μm、Δα ≤ 1′,就可以确保出射光线高度误差Δh≤ 2 5 μm ;当对称压弯第二晶体所需微位移器的行程≥ 1mm、精度≤ 1.2 5 μm时 ,可满足聚焦光斑的展宽≤ 0 .5mm要求 ,且当压弯半径R的弯曲精度在ΔR≤ 0 .75 %R的范围内不需对晶体压弯。
The principle and structure principle of the synchrotron focusing monocular monochromator are briefly introduced. It is analyzed that the actual rotation axis of synchrotron radiation sagittal monochromator deviates from the ideal rotation axis ΔS and the ideal included angle Δα between the crystal plane deviation and the guide rail, , And the effect of the angle-bending precision Δh of the sagittal focusing crystal bending radius on the broadening of the focal spot of the experimental station is theoretically deduced. When ΔS ≤ 31μm and Δα ≤ 1 ’, the height error of outgoing light can be ensured Δh ≤ 25 μm. When the displacement of micro-displacer required for symmetrical bending of the second crystal is ≥ 1 mm and the accuracy ≤ 1.2 5 μm, the focusing The flare broadening is ≤0.5 mm, and there is no need to bend the crystal when the bending accuracy of the bending radius R is in the range of ΔR≤0 .75% R.