A small aperture quadrupole magnet measurement method based on the single stretched wire method

被引：0
|
作者：
Liu C. [1 ,2 ]
Zhang J. [1 ,3 ]
Zhou Q. [1 ,2 ,3 ]
机构：
[1] Shanghai Institute of Applied Physics, Chinses Academy of Sciences, Shanghai
[2] University of Chinese Academy of Sciences, Beijing
[3] Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai
来源：
He Jishu/Nuclear Techniques | 2023年 / 46卷 / 06期
关键词：
Magnetic field measurement; Quadrupole magnet; Small aperture magnet; Stretched wire;
D O I：
10.11889/j.0253-3219.2023.hjs.46.060201
中图分类号：
学科分类号：
摘要：
[Background] The trend towards increasingly narrow apertures in multipole magnets poses a challenge to many conventional measurement methods. Consequently, these methods' applicability in small aperture multipole magnets is limited. However, the single stretched wire measurement technique has emerged as a promising alternative due to its minimal space requirements within the measurement domain. Therefore, this technique is well-suited for accurately measuring magnetic fields in small aperture magnets. [Purpose] This study aims to introduce a novel approach for analyzing the gradient integral and multipole errors of the quadrupole magnet, to address the limitations associated with the current single stretched wire method (SSWM). [Methods] Firstly, a magnetic measurement system based on the single stretched wire method was constructed with two boasted key advantages: minimal space occupation within the measurement domain, and flexible motion modes. Then, leveraging these features, measurements of the four poles of a quadrupole magnet by employing a hyperbolic trajectory was acquired, and a new technique for analyzing both the gradient integral and multipole errors associated with the quadrupole magnet was developed. Finally, the feasibility of this SSWM was verified by comparing the results obtained from our system to those derived from the rotating coil method. [Results] Measurement results of a quadrupole magnet with the inscribed radius of 11 mm and gradient of 100 T‧m‒1 by SSWM show that the repeatability of three measurements is better than ±1.5×10‒4 which is less than one-third of the maximum value of multipole error of 5×10‒4, so it can meet the measurement requirements. [Conclusions] The methodology outlined in this study for constructing the measurement system and analyzing the resultant data offers a practical and effective solution for the future magnetic field measurements of small aperture magnets. © 2023 Science Press. All rights reserved.
引用
收藏
相关论文
共 14 条
  • [1] ZHAO Yu, LI Zhiping, LIU Weihang, Et al., Physics issues of the diffraction-limited storage ring light source[J], Chinese Science Bulletin, 65, 24, pp. 2587-2600, (2020)
  • [2] LUO Qing, Basic principle and technology of diffraction limit storage ring[J], Modern Physics, 32, 3, pp. 51-56, (2020)
  • [3] Le Bec G, Chavanne J, Benabderrahmane C, Et al., High gradient quadrupoles for low emittance storage rings, Physical Review Accelerators and Beams, 19, 5, (2016)
  • [4] Le Bec G, Chavanne J, Penel C., Stretched wire measurement of multipole accelerator magnets, Physical Review Special Topics - Accelerators and Beams, 15, 2, (2012)
  • [5] Gehlot M, Khan S M, Trillaud F, Et al., Magnetic field integral measurements with stretched wire and hall probe methods[J], IEEE Transactions on Magnetics, 56, 5, pp. 1-8, (2020)
  • [6] Clarke J A., The science and technology of undulators and wigglers, (2004)
  • [7] Yang M, Chen F S, Yin B G, Et al., A rotating coil measurement system based on CMM for high-gradient small-aperture quadrupole in HEPS-TF[J], Radiation Detection Technology and Methods, 5, 1, pp. 8-14, (2021)
  • [8] WANG Hongfei, ZHANG Jidong, ZHOU Qiaogen, A stretch-wire system for accurate integrated magnetic field measurements in undulators[J], Nuclear Techniques, 32, 9, pp. 653-656, (2009)
  • [9] Gong L L, Li X Y, Li Y H, Et al., Single-block measurement for the cryogenic permanent magnet undulator sorting[J], Radiation Detection Technology and Methods, 5, 1, pp. 83-89, (2021)
  • [10] Hwang C S, Hong C H, Lin F Y, Et al., Stretch-wire system for integral magnetic field measurements[J], Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, pp. 194-197, (2001)
12