A study on multi-point gravity compensation of mirror bending system

SUN Fuquan1; 2 FU Yuan1 ZHU Wanqian1 XUE Song1 1

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A study on multi-point gravity compensation of mirror bending system

更新时间：2021-03-05

- A study on multi-point gravity compensation of mirror bending system
- NUCLEAR TECHNIQUES Vol. 34, Issue 4, (2011)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所
  2. 中国科学院研究生院
- 作者简介：
- 基金信息：
  
  应用光学国家重点实验室开放基金项目(09Q33FQ091)资助
- DOI：
  CLC： O572.21
- Published：01 April 2011
- 稿件说明：
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[1]孙福权,傅远,祝万钱,薛松.压弯镜系统自重平衡多点调节方法的研究[J].核技术,2011,34(04):246-250.

SUN Fuquan1, 2 FU Yuan1 ZHU Wanqian1 XUE Song1 1. A study on multi-point gravity compensation of mirror bending system[J]. Nuclear techniques, 2011, 34(4): 246-250.
[1]孙福权,傅远,祝万钱,薛松.压弯镜系统自重平衡多点调节方法的研究[J].核技术,2011,34(04):246-250. DOI：

SUN Fuquan1, 2 FU Yuan1 ZHU Wanqian1 XUE Song1 1. A study on multi-point gravity compensation of mirror bending system[J]. Nuclear techniques, 2011, 34(4): 246-250. DOI：

摘要

本文分析同步辐射光束线压弯系统中镜子自重引起的面形误差

介绍减少重力不利影响的方法。根据梁变形理论

提出多点调节的重力平衡方法

并结合上海光源XAFS光束线（BL14W）中的准直镜压弯系统

得到其平衡力最佳的作用点和大小

计算出用两点、三点和四点调节自重平衡时

面形的均方根误差分别为0.179、0.067和0.032μrad。结果表明

比常用的两点调节方式

三点、四点调节的压弯镜自重引起的面形误差明显减小

在镜子面形误差和所受载荷方面

四点调节自重平衡法的效果更为优越。

Abstract

The sag of mirror due to gravity induces unacceptable slope errors in beamline mirror-bending system of a synchrotron radiation facility

and approaches must be found to eliminate the unwanted gravity effect.According to the beam bending theory

the multi-point gravity compensation method is applicable.Taking an example of the bent collimating mirror for the XAFS beam-line(BL14W) at Shanghai Synchrotron Radiation Facility(SSRF)

the best position and value of the equilibrant were calculated through minimizing the gravity effect.With two

three and four points gravity compensation

slope errors were 0.179

0.067 and 0.032 μrad

respectively

i.e.the multi-point gravity compensation is better than the two-point gravity compensation

which is used for the Phase I beamlines of SSRF.The four-point gravity compensation method reduces more slope error and stress due to four support points.

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