Abstract:

There are many ways of design for the magnets used in nuclear magnetic resonance. However,  it is always challenging to make the magnet small, light, stable and having large volume with uniform magnetic field. Solution to this challenge lies in accurate computation of the electromagnetism field. In this paper, we first briefly reviewed the problems in magnet design, and then showed how to optimize the different ways of magnet design. An optimized magnet design was proposed, based on which a portable NMR cock analyzer was built successfully. The results from a number of on site tests showed that the portable NMR rock analyzer we built has high stability and good reproducibility, and is suitable for working under severe conditions.

Key words: NMR, permanent magnet, electromagnetic field, stability, reproducibility