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Abstract #2578

Magnetic Filed Shimming of a High Tc Superconducting Bulk Magnet Using a Cylindrical Single-Channel Shim Coil

Daiki Tamada1, Keisuke Maruyama1, Katsumi Kose1, Takashi Nakamura2

1Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki, Japan; 2RIKEN, Wako, Saitama, Japan

A cylindrical single-channel shim coil was developed for a high critical temperature (Tc) superconducting bulk magnet (4.7 Tesla) with a 23 mm diameter room temperature bore. The single channel shim coil was designed using circular current loops periodically placed on the cylindrical surface. The magnetic field distribution in a rectangular region (5 mm x 5 mm x 7 mm) was measured for various shim current values. As a result, about 30% homogeneity improvement was achieved for an optimal current value, which demonstrated usefulness of our approach.