Experimental Consideration on Influence of Magnetic After Effect on Gap Magnetic Field and Applicability of Conventional Hysteresis Models for Particle Accelerator Electromagnets

To further improve the control accuracy of the magnetic field generated by particle accelerator electromagnets, it is necessary to model not only the magnetic hysteresis behavior but also the magnetic after effect, which has never been studied in the previous literature. In this paper, the gap magnetic field of an accelerator magnet was measured under various excitation conditions to acquire the experimental data required for modeling. Consequently, it was clarified that the magnetic after effect may influence the magnetic hysteresis behavior. Moreover, it was accordingly indicated that a novel modeling technique is required in addition to the conventional hysteresis models developed in the electric machine field. (c) 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

Automated summary

To improve the control accuracy of particle accelerator electromagnets, this study models the magnetic hysteresis behavior and magnetic after effect, which have been overlooked in previous research. Experimental data on the gap magnetic field of an accelerator magnet under different excitation conditions were measured to support the modeling process. The study reveals the influence of the magnetic after effect on the magnetic hysteresis behavior, suggesting the need for a novel modeling technique in addition to conventional hysteresis models developed in the electric machine field.