A gradient coil design for a high-temperature superconducting bulk magnet using the finite-difference method

作者：Tamada D^*; Nakamura T; Kose K

来源：Superconductor Science and Technology, 2015, 28(9): 095010.

DOI：10.1088/0953-2048/28/9/095010

• magnetic resonance imaging
• gradient coil
• screening current
• high-temperature superconducting bulk magnet

The screening current induced in a bulk superconductor presents a critical problem for gradient coil design because it gives rise to undesirable effects on the gradient field: namely, a decrease in the efficiency and a distortion of the field. In this paper, a new coil design method for the bulk magnet is proposed using the finite-difference method (FDM) and the target-field method. The calculation using the FDM was implemented with the boundary conditions of the bulk magnet. Transverse and longitudinal coils were designed and fabricated for a high-temperature superconducting bulk magnet. The calculated results of the efficiency and the nonlinearity distribution of the gradient field agreed well with the measured results.

• 出版日期2015-9
• 单位RIKEN