HL-2M 磁体系统安装中的定位与测量

为提高磁体系统安装精度，在 HL-2M 集成大厅建立 63 个基准点构成测量基准网，并利用激光跟 踪仪等高精度测量设备建立每个磁体的局部坐标系，测量特征点的局部坐标；基于测量基准网和公共测量点，采 用最佳拟合得到坐标转换矩阵，以此得到特征点在测量基准网的位置，指导磁体安装。完成安装后的中心柱同支 撑基础的同轴度为∅2.03mm；PF1~PF4 线圈安装标高偏差为±0.5mm，与中心柱的同轴度为∅2.60mm；PF5/6/7/8 线圈与中心柱的同轴度偏差小于∅3.00mm，标高偏差在−1mm, 1mm]区间内。基于以上方法所得到的线圈安装精 度都满足设计需求。

Research on the positioning measurement technologyfor the installation of the HL-2M magnet system

 To improve the magnet system installation accuracy, 63 reference points were installed in the  HL-2M hall to form a measurement reference network. The local coordinates of the characteristic points on every  coil were measured with the established local coordinate system and the high-precision measuring equipment such  as the laser tracker. And then the coordinates of these points were converted to the installation coordinate system  through the reference network and the best fit, which could be used for the positioning of the coils. When the  integration of these coils was completed, the coaxality between the center column of toroidal field (TF) coils and  the supporting foundation was ∅2.03mm. The elevation deviation of the PF1~4 coils was±0.5mm, and the  coaxality with the center column was ∅2.60mm. The coaxality between the PF5~8 coils and the center column  was below ∅3.00mm, and the elevation deviation of these coils was within the interval of −1mm, 1mm]. So, the  installation accuracy of these coils meet the installation requirements.