Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1991-07-02
1993-05-04
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324307, G01R 3320
Patent
active
052085368
ABSTRACT:
A multiple-pulse RF pulse sequence applied in the presence of an oscillating magnetic field gradient enables slice selection in a magic angle spinning nuclear magnetic resonance solids imaging system. Slice selectivity is produced by a series of RF pulses, some of which introduce a nutation that coherently adds for only a selected slice plane of the sample and averages to zero in other areas and some of which average certain gradient-induced modulations so that only those object areas in the selected slice contribute to the output. The pulse train is applied in a manner synchronous with rotor rotation so that rotation induced modulations average to zero over one or more rotor rotation periods.
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Bruker Instruments, Inc.
Mah Raymond Y.
Tokar Michael J.
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