同步辐射压弯镜重力补偿方法

黄智超; 程建高; 李飞; 张磊; 王克逸

doi:10.11884/HPLPB201830.180066

同步辐射压弯镜重力补偿方法

doi: 10.11884/HPLPB201830.180066

中国科学技术大学精密机械与精密仪器系, 合肥 230026

基金项目:

国家重点研发计划项目 2016YFA0401300

详细信息

作者简介:
黄智超(1993—), 男, 硕士研究生, 主要从事精密机械设计; huangzc@mail.ustc.edu.cn

通讯作者:
王克逸(1962—), 男, 博士, 教授, 主要从事信息光学和精密仪器的研究; kywang@ustc.edu.cn

中图分类号: TH123
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- 文章访问数: 1119
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- 被引次数: 0
出版历程
- 收稿日期: 2018-03-13
- 修回日期: 2018-05-03
- 刊出日期: 2018-08-15

Gravity compensation for bent mirror of synchrotron radiation

Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, Chin

摘要

摘要: 介绍了同步辐射压弯镜重力引起的面型斜率误差及评价标准。根据梁的弯曲理论，提出了力矩加多点力补偿重力的方法，以上海光源XAFS光束线(BL14W)中的压弯镜为例，计算出力矩加两点力、力矩加三点和力矩加四点力补偿的最小斜率均方根误差分别为0.092，0.041，0.022 μrad。补偿结果的对比表明，当镜子两端有力矩补偿时，各补偿力相应减小，力矩加两点力、力矩加三点力和力矩加四点力补偿的面型斜率误差分别为没有力矩补偿时的52%，61%，68%。力矩加多点力补偿重力的方法明显优于多点力补偿重力的方法。
- 压弯镜 /
- 重力补偿 /
- 力矩加多点力 /
- 面型误差 /
- 同步辐射
Abstract: Slope error and evaluation criteria of bent mirror of synchrotron radiation induced from gravity are introduced.According to the bending theory of beam, a method of gravity compensation by couple combined with multi-point forces is proposed.Taking the bent mirror of the XAFS beam-line (BL14 W) at Shanghai Synchrotron Radiation Facility (SSRF) as an example, the minimum root mean square (RMS) slope error of the bent mirror under the action of two-point, three-point and fourpoint forces combined with couples are calculated, and the result is 0.092, 0.041 and 0.022μrad, respectively.The comparison between the compensation results shows that when a couple is applied to both ends of the mirror, the corresponding compensation forces decreases, and the slope errors of the couple combined with two-point, three-point and four-point forces are 52%, 61%and68% of those without couples.Obviously, the compensation method of couples combined with multi-point forces is better than the multi-point forces compensation method.
- bent mirror /
- gravity compensation /
- couple combined with multi-point forces /
- slope error /
- synchrotron radiation

HTML全文

图 1 压弯镜在重力作用下的变形

Figure 1. Deformation of mirror caused by gravity

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图 2 力矩加两点力补偿重力时压弯镜的受力分析

Figure 2. Force analysis of gravity compensation by couple with two forces

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图 3 力矩加三点力补偿重力时压弯镜的受力分析

Figure 3. Force analysis of gravity compensation by couple with three forces

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图 4 力矩加四点力补偿重力时压弯镜的受力分析

Figure 4. Force analysis of gravity compensation by couples with four forces

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图 5 不同方法补偿重力后的面型斜率误差

Figure 5. Slope error of mirror after gravity compensation by different methods

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表 1 不同补偿方法的对比

Table 1. Comparison between different compensation methods

method	couple/(N·m)	force 1/N	force 2/N	slope error/μrad
2 forces	-	41.530	-	0.179
couples with 2 forces	1.551	32.932	-	0.092
3 forces	-	29.880	29.780	0.067
couples with 3 forces	0.903	25.126	25.293	0.041
4 forces	-	23.370	23.280	0.032
couples with 4 forces	0.591	20.315	20.439	0.022

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