SpecDoc NMR.docx

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Borehole NMR System for the USDA, ARS, SAWS in Davis, CA Federal contract opportunity
Solicitation number
12905B22Q0129
Issued by
Department of Agriculture Agricultural Research Service Field Research Implementation and Information Delivery Pacific West Area

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Borehole NMR System Specifications Gordon Osterman 3-Jun-22

The USDA-ARS Sustainable Agricultural Water Systems unit wishes to purchase a borehole NMR system to assist with groundwater monitoring studies. The system needs to be able to:

· Acquire CPMG pulse sequence data to give estimates of the NMR water content and transverse relaxation profiles. Echo times must be less than one millisecond.

· We want to be able to deploy the system through the hollow bore of standard 2.25” outer-diameter direct-push rods used by many drilling companies. The inner diameter of these rods are 1.5”, so the borehole NMR tool must be narrower than this.

· The NMR system must be able to measure the ambient electromagnetic noise at the surface.

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