Three-dimensional coordinate calibration technology for high energy photon source magnets
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摘要: 针对高能同步辐射光源需要进行大批量磁铁的中心引出标定,提出了一种基于三坐标测量机的磁铁机械中心标定方案,确定了编写自动测量程序的流程和方法,参与完成了加速器中多种类型磁铁的标定。对176块储存环六极铁的三坐标机测量数据进行分析,结果表明:每块磁铁进行两遍机械中心标定,获得准直基准点的标定重复性在0.01 mm之内;极缝间距离的实测值与设计值标准偏差均在0.015 mm之内;标定效率相较激光跟踪仪提高了2倍。这种借助三坐标测量机的磁铁标定方法可以提高标定精度,降低人力成本,提高工作效率,能为加速器工程中磁铁中心的引出标定工作提供参考,保证加速器装置的安装顺利,满足加速器准直测量的工程进度要求。Abstract: Aiming at the High Energy Photon Source which needs to calibrate the center of a large number of magnets, a scheme of calibrating the center of magnetic machinery based on coordinate measuring machine (CMM) is proposed, the process and method of writing automatic measuring program are determined, and the calibration of various types of magnets in the accelerator is completed. The results show that the calibration repeatability of the reference point of collimation is within 0.01 mm by calibrating the mechanical center twice for each magnet. The standard deviation between the measured value and the design value is within 0.015 mm. The calibration efficiency is 2 times higher than that of the laser tracker. This method of magnet calibration with CMM can improve the calibration accuracy, reduce the labor cost, improve the work efficiency, provide reference for the magnet center extraction calibration in the accelerator work, ensure the smooth installation of the accelerator device, and meet the requirements of the accelerator alignment measurement project schedule.
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表 1 三坐标机参与标定的磁铁数量统计
Table 1. Statistics of the number of magnets involved in calibration by the coordinate machine
type of magnet corrector magnet hexacode iron quadrupole iron transport line four grade iron quantity 195 176 30 43 表 2 HEPS磁铁预准直误差分析
Table 2. Analysis of precollimation error of HEPS magnet
mm magnetic center elicits
calibration errorpre-collimation
measurement errorpre-collimation
adjustment deviationmagnets lock the
momentumthe opening and closing
momentum of the magnetmagnets transport
momentum0.010 0.010 0.010 0.010 0.010 0.020 表 3 磁铁极头和外基准面的平面拟合标准偏差对比(储存环176块六极铁)
Table 3. Comparison of the standard deviation of the plane fit between the magnet head and the external datum plane
instrument standard deviation/mm pole seam middle/pole plane left and right plane top plane tracker 0.018 0.045 0.026 CMM 0.009 0.028 0.013 表 4 HEPS六极铁的标定重复性
Table 4. Calibration repeatability of HEPS sextupole
maximum positive deviation/mm minimum negative deviation/mm standard deviation/mm ΔX 0.009 −0.009 0.003 ΔY 0.009 −0.008 0.002 ΔZ 0.005 −0.005 0.001 表 5 HEPS环六极铁极缝偏差统计(176块铁)
Table 5. Pole seam deviation statistics of sextupole of HEPS sextupole
magnet type maximum positive deviation/mm minimum negative deviation/mm standard deviation/mm SF1/2 0.050 −0.045 0.012 SD1/4 0.047 −0.041 0.014 SD2/3 0.062 −0.082 0.014 -
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