Title: Methods and systems for low to ultra-low magnetic field nuclear magnetic resonance for detecting chemical nerve agents

Abstract

A nuclear magnetic resonance (NMR) system is configured to detect chemical threat material. The system comprises a magnet configured to generate a magnetic field of about 300 millitesla or less; and a probe configured to detect nuclear relaxation of at least two nuclei selected from the group consisting of 1H, 19F, 31P and 14N, and detect the spin density of nuclei selected from the group consisting of 1H, 19F, 31P and 14N, following excitation.

Inventors:

Williams, Robert F.; Espy, Michelle A.; Yoder, Jacob Luther; Kaseman, Derrick C.; Magnelind, Per Erik; Urbaitis, Algis V.; Janicke, Michael Timothy; Michalczyk, Ryszard; Schmidt, Jurgen G.; Nath, Pulak; Paisner, Scarlett Widgeon

Issue Date:

2022-05-24

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1892962

Patent Number(s):

11340181

Application Number:

16/806,954

Assignee:

Triad National Security, LLC (Los Alamos, NM)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G01N24/081 - {Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity}
G01N24/084 - {Detection of potentially hazardous samples, e.g. toxic samples, explosives, drugs, firearms, weapons}

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

G01R33/307 - {specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer}
G01R33/3635 - {Multi-frequency operation}
G01R33/3815 - with superconducting coils, e.g. power supply therefor
G01R33/383 - using permanent magnets
G01R33/3875 - using correction coil assemblies, e.g. active shimming
G01R33/422 - of the radio frequency field
G01R33/445 - {MR involving a non-standard magnetic field B0, e.g. of low magnitude as in the earth's magnetic field or in nanoTesla spectroscopy, comprising a polarizing magnetic field for pre-polarisation, B0 with a temporal variation of its magnitude or direction such as field cycling of B0 or rotation of the direction of B0, or spatially inhomogeneous B0 like in fringe-field MR or in stray-field imaging}

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DOE Contract Number:  

89233218CNA000001

Resource Type:

Patent

Resource Relation:

Patent File Date: 03/02/2020

Country of Publication:

United States

Language:

English