FIELD: examination of materials with use of nuclear magnetic resonance. SUBSTANCE: method is based on change of gap between main permanent magnets and usage of lugs on main magnets in order to expand investigation area at highest rate of build-up of nuclear magnetic resonance spectrum. Main magnets in device can move along longitudinal axis. Device incorporates additional magnets, which carry magnetization coils to change gap between main magnets. Permanent magnets are positioned between additional magnets and carry lugs in the form of ball segments in gap between them. EFFECT: expanded examination field. 2 cl, 5 dwg
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