BEPCⅡ预安装准直测量方案设计

Preassembly and pre-alignment of BEPCII

北京正负电子对撞机重大改造工程(简称BEPCⅡ)是国家重大科学工程项目。BEPCⅡ的预安装准直测量采用SMX公司的激光跟踪仪,将BEPCⅡ储存环半个支架单元的B铁、S铁、Q铁和真空盒等设备安装到支架上,并对每个设备进行测量调整。经过坐标变换,转化为B铁磁铁坐标系,更直观地表现了各个部件之间的相互关系。经过误差分析,确立了测量的精度和准确度。

The reconstruction of Beijing Electron Positron Collider (BEPCII) is a great national scientific project. To install and adjust B magnet, Q magnet, S magnet and vacuum in a support accurately, a laser tracker is adopted in the process of pre-assembly and pre-alignment of BEPCII. Transforming instrument reference frame into B magnet reference frame by coordinate-transformation represents more visual relations among all parts. The survey precision and accuracy are confirmed by error analyses.