Design Improvement of a Staggered YBCO Undulator

S. D. Chen, C. A. Chiang, C. M. Yang, C. K. Yang, H. W. Luo, J. C. Jan, I. G. Chen, C. H. Chang, C. S. Hwang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A strong field and short period undulator can be a desirable light source device in a storage ring or a free-electron laser. Bulk YBCO can be used to construct a high-temperature-superconducting undulator in a staggered array structure. The YBCO material in form of 32 mm diameter and 2.5 mm thick was used to assemble a staggered magnet array. The period length is 5 mm and the magnet gap is 4 mm. To estimate the strength of a sinusoidal field and to optimize the end-pole design to minimize the first (i.e., electron angle) and second field integral (electron position), an energy-minimization method (EM-method) based on Bean's model to simulate the field trapped in the HTS-Block is introduced. In this paper, we focus on promoting the practical value of the EM-method simulation. Combining the experimental experience of a YBCO staggered undulator and the simulation experience based on the EM-method, we address some issues to enhance the efficacy of this undulator design.

Original languageEnglish
Article number8253831
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2018 Apr

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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