论文信息 - Radiofrequency field propagation in conductive NMR samples

Radiofrequency field propagation in conductive NMR samples

Abstract Solutions for the magnetic fields in and around spherical conductive NMR samples are presented. These results affect the expressions for the signal-to-noise of NMR on conductive samples when the skin depth of RF penetration is not large compared to the sample size. The exact solution presented here of a circular surface coil adjacent to a spherical conductive sample demonstrates the effect of eddy current shielding of RF fields produced by non-homogeneous coils. Specific results are presented for various surface coils adjacent to a spherical sample at 10 and 150 MHz. Beyond a frequency-dependent depth, the signal-to-noise of different surface coils is shown to be nearly identical.

J. Carlson | J. W Carlson

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