Patent ID: 7157912

Claim:
A homogeneous magnetic field generating apparatus having a group of superconducting main coils for generating a magnetic field in a measuring space and a group of superconducting shim coils for correcting inhomogeneity of the magnetic field, wherein at least one of the shim coils is wound around a cylinder member or the like disposed in a coaxial relation with the group of the superconducting main coils, and wherein the at least one of the superconducting shim coils is wound in such a manner that positions of a winding center locus in an axial direction of the superconducting shim coil change approximately in accordance with a combination of a sine or cosine function with a cycle of (360/m) degrees (m: an integer of one or more) in a circumferential direction and a sine or cosine function with cycle of (360/(m+2)) degrees.