Patent ID: 6469507
Filing Date: 2002-10-22
Classification: G01R

Abstract:
A toroid cavity detector for in-situ analysis of a sample through the use of nuclear magnetic resonance, said toroid cavity detector comprising:a housing having a top and base portion forming a toroid cavity with a longitudinal axis, said housing being placed in an externally applied magnetic field B0; a first electrical conductor extending through said top of said housing along said longitudinal axis into said toroid cavity; a principal detector element contained within said toroid cavity connected to said first electrical conductor; a second electrical conductor connected to said principal detector element and extending along said central longitudinal axis of said housing through said base of said housing; said principal detector element comprising a generally flat metal conductor having a plane that is oriented generally parallel to said longitudinal axis of said toroid cavity, said metal conductor being disposed adjacent to said sample and having a predefined shape for said sample; and an NMR spectrometer applying an RF excitation signal pulse through said first and second electrical conductors and said principal detector element for producing an alternately energized and de-energized magnetic field B1 in said sample and through the toroid cavity.