Numerical analysis of magnetization process of high-T_c superconductor undulator of X-ray FEL using power law conductivity

Article type: Research Article

Authors: Kawaguchi, Hideki^a; | Deri, Yi^a

Affiliations: [a] Muroran Institute of Technology, Department of Information and Electronic Engineering, Muroran, Japan

Correspondence: [*] Corresponding author: Hideki Kawaguchi, Department of Information and Electronic Engineering, 27-1, Mizumoto-cho, 050-8585, Muroran, Japan. E-mail: kawa@mmm.muroran-it.ac.jp

Abstract: This paper presents a simulation of magnetization process of a high-Tc superconductor (HTS), which is used for undulator magnets of X-ray Fee Electron Laser. The numerical analysis is carried out by a current vector potential method (T-method). In particular, it is discussed to use a power law macro-model for behavior of shielding current in the HTS. It is shown that the power low macro-model provides us better agreement with measurements for the final stage magnetic field distribution compared with conventional simulations based on a critical current macro-model.

Keywords: X-ray free electron laser (XFEL), undulator, high-T _c superconductor (HTS), current vector potential method (T-method), critical state model, power law model

DOI: 10.3233/JAE-171051

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 1, pp. 165-171, 2019