Nuclear magnetic resonance apparatus with a permanent magnet

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

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324318, G01R 3320

Patent

active

046958029

ABSTRACT:
In a nuclear magnetic resonance apparatus the permanent magnetic material of the main magnet is formed by magnetized bars bounded by flat planes which surround a field space with a polygonal cross-section. Fitted around the permanent magnetic material is a return yoke of high-permeability material whose geometry can be matched to the locally prevailing flux. Extra magnetic devices can be fitted to improve the field uniformity in the field space enclosed by the magnetic material.

REFERENCES:
patent: 3768054 (1973-10-01), Neugebauer
patent: 4411270 (1983-10-01), Damadian
patent: 4498048 (1985-02-01), Lee et al.

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