Passively shimmed principal detector elements for toroid cavity detector NMR probes
US6788064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Mar 12, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/34092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A novel NMR principal detector element of the present invention comprises a NMR-active inductor in a radio frequency (RF) resonance circuit, and mitigates the distortions in a static magnetic field caused by the introduction of a toroid cavity NMR detector. The RF resonance circuit includes a novel principal detector element, capacitor elements, and a sample chamber (the cavity). The novel principal detector element defines the NMR active portion of the inductance of the electronic resonance circuit. In one embodiment of the invention, the novel principal detector element includes two hemispheres connected by a central rod. The central rod can be of any length and diameter, and the hemispheres can be of any diameter. A typical embodiment of the invention would include a rod that is 2 cm long having a diameter of 1 mm, and hemispheres having a diameter of 5 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.