Study on the reduction of current for a high field superconducting magnet by using a superconducting transformer

Abstract Generally speaking, a high field superconducting magnet like a dipole magnet needs a large excitation current, and its equipment for current excitation becomes very large and complicated for operation. So the authors have developed a magnetic system composed of a superconducting magnet and a superconducting transformer basically used for the reduction of the excitation current 1 . In this study, a fundamental test of the magnet system has been conducted to examine the working principle, and the effectiveness of this system was verified together with the possible reduction in excitation current for the high field superconducting magnet.