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Increasing the Signal-to-noise Ratio of Field NMR (SNMR) Measurements by Means of Pre-polarization
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 23rd European Meeting of Environmental and Engineering Geophysics, Sep 2017, Volume 2017, p.1 - 5
Abstract
Summary
The Surface Nuclear Magnetic Resonance (SNMR) Method allows direct quantification and characterization of free pore-water in the soil. SNMR measurements in densely populated areas, often cause S/R ratios of less than 1. This situation is made additionally worse when the SNMR method is used to investigate the Vadose Zone. Because the magnitude of the SNMR signal is also dependent on the strength of the magnetic field, we have build and tested an SNMR Instrument which uses the Pre-Polarization technique to improve the Data quality by up to one order.
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