학술논문
Pulsed Wire Magnetic-Field Measurement System on Permanent Magnet Quadrupoles
Document Type
Periodical
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 34(5):1-4 Aug, 2024
Subject
Language
ISSN
1051-8223
1558-2515
2378-7074
1558-2515
2378-7074
Abstract
The adjustable strength permanent magnet quadrupoles used in this study were designed and manufactured at the National Synchrotron Radiation Research Center (NSRRC). The permanent magnet quadrupole had a bore radius of 3.5 mm and an effective length of 50 mm. It was based on SmCo blocks and provided an effective gradient field from 325 T/m to 355 T/m. Typical methods for measuring the magnetic-field performance of quadrupole magnets are the stretched-wire and rotating coil measurement systems. A pulsed-wire measurement (PWM) system was used to measure the magnetic fields of an in-vacuum undulator at the NSRRC. The PWM system provides quick measurements of the magnetic fields and is easy to install on any permanent accelerator magnet. In this work, a PWM system was used to measure the magnetic-field integrals and the multipole errors of quadrupole magnets. Comparison was made of the magnetic field results obtained with PWM and stretched-wire measurement methods.