| 摘要 |
PURPOSE:To deny a higher-harmonic magnetic field without using a correction coil and a correction magnet by displacing and arranging the radial position of a coil in a block. CONSTITUTION:With an inner-diameter coil 40, coils 40A, 40C, 40D are disposed at the position of a radius R1, and coils 40A, 40E are arranged at the position of a radius r1 displaced to the outside in the radial direction from the coils 40B, 40C, 40D. With an outer-diameter coil 36, a coil 36B is disposed at the position of a radius R2, and coils 36A, 36C are arranged at the position of a radius r2 displaced to the outside in the radial direction from the coil 36B. Regarding an inner-diameter coil 42 and an outer-diameter coil 38, external coils are also disposed similarly while being disposed to the outside in the radial direction. A higher-harmonic magnetic field changes by displacements in the radial direction of the coils. The higher-harmonic magnetic field varies by displacing the circumferential positions of these coils. |
