PERMANENT MAGNET SYSTEM

摘要

A magnet system for generating a static magnetic field for NMR analysis includes a first permanent magnet, and a second permanent magnet disposed below the first permanent magnet element and substantially parallel thereto. An upper metallic disc is disposed above the first permanent magnet and a lower metallic disc is disposed below the second permanent magnet. A hollow outer metallic shield encloses the first and second permanent magnets and the upper and lower metallic discs. The upper and lower metallic discs are movable relative to the first and second permanent magnets, respectively, in such a way that the distances between the metallic discs and the respective permanent magnets are optimized so as to render the gradient of a static magnetic field generated by the magnet system sufficiently uniform for use in the NMR analysis.