NUCLEAR TECHNIQUES, Volume. 47, Issue 2, 020201(2024)
Analysis of calibration schemes for HEPS sextupole
Sextupoles are an important component of storage ring octonal unit in high energy synchrotron radiation sources. They require complex technological processes and precise center extraction. Therefore, it is necessary to find out the most reasonable calibration scheme for the mechanical center.
This study aims at the calibration scheme for the mechanical center extraction of high energy photon Ssurce (HEPS) sextupoles, and obtaining the corrected mechanical central coordinate system.
The method of directly measuring the reference plane of the sextupole was adopted for the mechanical center calibration of magnets. By rotating the conventional calibration coordinate system with a given pole seam deviation angle, the three polar seam surfaces were brought closer to the theoretical positions to decrease the main diagonal component of the sextupoles. The mechanical center calibrations were performed twice for each hexacode iron to further reduce the impact of the polar seam error.
The calibration results show that the calibration repeat accuracy is 0.005 mm for the sextupole. The standard deviation between the measured value and the design value of the pole seam spacing is 0.015 mm. Additionally, the standard deviation of the reference point before and after the rotation of the coordinate system is 0.09 mm, with a maximum rotation angle of 0.6 mrad.
The calibration scheme of this study can be used to improve the calibration accuracy and provide reference for the calibration of similar equipment. It ensures smooth installation of accelerator devices and is of significant importance for accelerator collimation measurements.
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Yuanying HAN, Yafeng WU, Lan DONG, Tong WANG, Shang LU, Luping YAN, Luyan ZHANG, Xiaoyang LIU, Haoyue YAN, Na MA, Zhenqiang HE, Zhiyong KE, Lingling MEN, Bo LI, Xiaolong WANG, Jing LIANG. Analysis of calibration schemes for HEPS sextupole[J]. NUCLEAR TECHNIQUES, 2024, 47(2): 020201
Category: Research Articles
Received: May. 9, 2023
Accepted: --
Published Online: Apr. 24, 2024
The Author Email: WU Yafeng (吴亚峰)