NMR probe for cross-polarization measurements

Details NMR probe for cross-polarization measurements NMR probe for cross-polarization measurements

1995-03-24

1996-07-23

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324314, 335299, G01R 3320

Patent

active

055393152

ABSTRACT:
A nuclear magnetic resonance cross polarization probe uses a dual-coil arrangement in which a single-turn inner coil is surrounded by a solenoid coil. The inner coil is tuned to the frequency of a relatively high Larmor frequency nuclei type, such as proton. The solenoid coil is tuned to a lower Larmor frequency nuclei type. An inner sample region surrounded by the inner coil has a first magnetic field component induced by an electrical signal at the relatively high frequency in the inner coil. An electrical signal at the lower frequency is input to the solenoid coil and results in the generation of a magnetic field alternating at the lower frequency. This field induces a current in the inner coil at the lower frequency that, in turn, induces a magnetic field component in the inner region at the lower frequency. Because the structure of the relatively high magnetic field component and the lower magnetic field component in the inner region are both dictated by the shape of the inner coil, a good spatial matching of the fields is obtained resulting in a good Hartman-Hahn match across the sample volume.

REFERENCES:
patent: 4717880 (1988-01-01), Ono et al.
patent: 4799016 (1989-01-01), Rezuani
patent: 5038105 (1991-08-01), Codrington
patent: 5192911 (1993-03-01), Hill et al.
patent: 5227756 (1993-07-01), Hed
patent: 5311134 (1994-05-01), Yamagata et al.

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