Development of BPM calibrator and its application for phase II in HLS

This article presents a BPM (Beam Position Monitor) calibration system developed for phase II of HLS (Hefei Synchrotron Radiation Light Source). The paper describes the development of the test stand and emphasizes key technique that guarantees mechanical accuracy of the system. The test equipment is of erect type and the geometric accuracy of ±0.01mm is obtained. The system has been served for calibrating BPM pickups, which are mounted in vacuum chambers of inject section. The electrical center of the BPMs is measured with respect to the geometrical center in the calibration machine. The eligible vacuum chambers have been installed in the storage ring.