Affiliations: [a] School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin, China | [b] Department of Information and Electronic Engineering, Muroran Insititute of Technology, Muroran, Japan
Correspondence:
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Corresponding authors: Yi Deri, School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin 300222, China; and Department of Information and Electronic Engineering, Muroran Institute of Technology, 27-1, Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan. E-mail: 18999806@mmm.muroran-it.ac.jp. Hideki Kawaguchi, Department of Information and Electronic Engineering, Muroran Institute of Technology, 27-1, Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan. E-mail: kawa@mmm.muroran-it.ac.jp
Abstract: The Pure-type HTS undulator is proposed to achieve a high-intensity magnetic field and small size undulator for a compact free-electron laser (FEL). A high precision simulation is required before making the real machine since the sizes and positions are difficult to adjust after the HTSs are magnetized in the cryostat. For this purpose, authors have been developed a numerical simulation code for the magnetization process of HTS undulator of X-FEL based on the power-law macro-model. In this paper, the previously developed simulation code can be speeded up by carefully optimizing the parameters of the power-law macro-model for the 3-HTS magnets model and a large-scale simulation can be performed in an acceptable time by using a multipole expansion for the Biot–Savart law. In addition, for practical applications, the influence of the fluctuation of the magnets thickness and critical current for the electron trajectory are evaluated by using the speed-up simulation code.
