Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1985-07-09
1987-09-22
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
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.
Mayer Robert T.
Tamoshunas Algy
Tokar Michael J.
U.S. Philips Corporation
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