Research on magnetic centermeasurement of quadrupole and sextupole using vibrating wire alignment technique in HEPS-TF
作者机构：Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Institute of Neutron SciencesDongguan 523808China University of Chinese Academy of SciencesBeijing 100049China
出 版 物：《Radiation Detection Technology and Methods》 (辐射探测技术与方法（英文）)
年 卷 期：2018年第2卷第2期
页 面：140-147页
学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术]
基 金：This work was supported by High Energy Pho-ton Source Test Facility(HEPS-TF)
主 题：Vibrating wire Magnetic center Measurement precision Magnet adjustment
摘 要：Purpose In order to meet the extremely low emittance requirement,the magnets in the storage ring of high-energy photon source(HEPS)need to have a stable support and precise *** HEPS-TF,the key and difficult technologies of HEPS should be researched and *** wire alignment technique is one important project of *** can be used to pre-align the quadrupoles and sextupoles on one girder with high precision.A vibrating wire measurement system was set up and tested to verify the magnetic center measurement precision and the magnet adjustment *** There are one sextupole and one quadrupole installed on a multipole *** wire is stretched through mechanical center of the magnet apertures and supported by the test benches on the two sides.A single conducting wire is stretched through themagnet aperture and electrified by alternating *** wire will vibrate for a period of Lorentz *** matching the current frequency to one mode of natural frequency of the wire,the vibrating amplitude will be *** by measuring the vibrating amplitude,the magnetic field at the wire position can be *** the wire across the magnet aperture in the transversal or vertical direction,the distribution of magnetic field and magnetic center position can be *** to the magnetic center position error to adjust the *** the magnetic center of all magnets installed on the multipole girder one by one,and adjust their magnetic center to a *** The magnetic center measurement precision is better than±3μm,and the magnet adjustment error is less than 6μ*** The vibrating wire system design and a series of magnetic center measurement experiments have gained good *** has been proved the vibrating wire system is designed reasonable and using the vibrating wire to align the magnets installed on a multipole girder is feasible and can reach a high precision.
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