FIELD: nuclear physics.
SUBSTANCE: invention consists in fact that in gap between two main cylindrical permanent magnets (1, 5) are placed two additional cylindrical small magnets (2, 4). Additional magnets are arranged so that radius of study with uniform magnetic field is increased. By reducing gap between two main magnets and adjustment of gap between additional small magnets maximum possible increase of magnetic field intensity in field of study of specified radius is obtained.
EFFECT: increased radius of study of materials by means of nuclear magnetic resonance (NMR) and increased magnetic intensity in area of examination.
2 cl, 3 dwg
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