MAGNETIC FIELD GENERATING SYSTEM APPLICABLE TO NUCLEAR MAGNETIC RESONANCE DEVICE

摘要

This invention relates to an magnetic field generating system applicable to nuclear magnetic resonance device, wherein the pole plate is located between pulse excitation coil and magnetic field generating source; the pole plate is composed of a plurality of pole plate segments; said pole plate segments are a plurality of interleaving arc-shaped segments, circles like wire winding pattern of a gradient coil, spoke shapes or interleaving radiating shapes; said pole plate segments are electrically insulated, or conducting only on single points without forming a conducting circle. Each pole plate segment is made by cutting slits in an entire pole plate base in a certain depth but not penetrating or by pre-making the soft magnetic materials into the desired shapes and then fixing them to the pole plate base by mechanical methods like screwing, tessellating or adhering. The electrical insulation is accomplished by providing insulating chip on the pole plate segments or by coating insulating layer on the surface of the pole plate segments.