Author: Hwang, J.M.
Paper Title Page
THPOST034 Development of Magnetic Harmonics Measurement System for Small Aperture Magnets 2517
SUSPMF122   use link to see paper's listing under its alternate paper code  
 
  • J.M. Hwang, J. Bahng
    Korea University Sejong Campus, Sejong, Republic of Korea
  • E.-S. Kim
    KUS, Sejong, Republic of Korea
 
  Storage ring has been improved to achieve high brightness of x-ray light source by making beam size and beam emittance smaller and enlarging the beam intensity. To achieve requirements such as a small beam emittance, the magnets need to have a larger magnetic field gradient and complex function with small aperture size. Since the complex structure and small beam size accompany with large errors in beam dynamics by high order field distortion of the magnets, it is important to measure the harmonics of the magnet in order to measure and improve it. Traditional field measurement methods such as hall probe and rotating loop have difficulty in measuring the harmonics of a magnet with a small aperture due to restrictions that physical size of the hall sensor and loop-card respectively. We developed Single Stretched Wire (SSW) method for the magnetic field measurement method on a small aperture magnet, in particular harmonics of the magnet. The system consists of a thin wire, accurate actuator system, and voltmeter. We describe the development of the SSW system and the result of the performance test by using our system in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THPOST034  
About • Received ※ 08 June 2022 — Revised ※ 10 June 2022 — Accepted ※ 22 June 2022 — Issue date ※ 02 July 2022
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