MAGNETIC SYSTEM FOR NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Russian patent published in 2019 - IPC G01R33/38 

FIELD: physics.

SUBSTANCE: use: for nuclear magnetic resonance spectroscopy. Summary of invention consists in the fact that magnatic system for nuclear magnetic resonance spectroscopy includes two permanent magnets, two pole tips installed in an iron yoke with a working gap between the latter and a temperature compensation device. Temperature compensation device is equipped with two magnetic shunts of magnetically soft material, each of which is made in the form of two identical plates in form of a circular segment. Plates are fixed in corresponding recesses in gear wheels from nonmagnetic material with a gap between them. Gear wheels are installed on side surfaces of magnetic system with possibility of turning direction of long side of gap at angle from 0 to 90 degrees relative to direction of magnetic flux of permanent magnets. Device is also equipped with two additional gear wheels, each of which is engaged with the corresponding main gear wheel, additional wheels are fixed on the shaft, which is connected to the step motor.

EFFECT: possibility of stable magnetic field intensity independent of ambient temperature in working gap of magnetic system.

1 cl, 4 dwg