| 摘要 |
PURPOSE:To obtain an accurate, uniformalized and stabilized magnetic field by a method wherein a permanent magnet and an auxiliary permanent magnet having the same magnetized orientation are installed in freely movably inside or outside the permanent magnet. CONSTITUTION:Magnetic pole piece 2 is fixed facing each other at one edge of a pair of permanent magnet 1 of F-B-R system and connects the other edge to the plural hollows 6 being bored in the magnet 1 in the direction from the yoke 3 to the pole 2, and in these hollows 6, the auxiliary permanent magnet 7 which is magnetized in the same orientation as the magnet 1 and the pole of the space 4 side is magnetized to the same pole, is inserted so that the surface of outside circumference contacts with the inside surface of the hollow 6. The substantial mass of this magnet 1 is adjusted by means that the movement amount in upper and lower directions of this magnet 7 shown in the figure is adjusted by the bolt member 8, thereby, the magnet generating value to the space 4 is uniformalized and good uniformed magnetic field is obtained stably. |
