Application of Bulk High-temperature Superconductor to Insertion Device for Synchrotron Radiation

Abstract

Synopsis: In this study, we propose a new undulator structure based on a bulk high-temperature superconductor stacked array for insertion devices in synchrotron radiation facilities and free-electron laser devices. A strong periodic magnetic field can be generated in a short period from induced currents in the stacked bulk high-temperature superconductors. This study describes the principle of operation and features of the undulator, and shows the results of generation and control of the periodic magnetic field. We have also developed a numerical model for estimating the performance of the undulator. Excellent performance is expected at approximately 20 K.