SAMPLE HOLDER FOR USE IN NMR
First Claim
1. A pressurizable holder for a sample to be examined by NMR, comprising a pressure retaining nonmagnetic tube formed of nonmetallic electrically insulating material or non-metallic electrically insulating matrix material reinforced with electrically conductive filaments configured to have less conductivity transverse to the filaments than along the filaments so as in either case to inhibit induced eddy currents, wherein the tube surrounds at least one radio-frequency coil and the at least one radio-frequency coil surrounds a space for the sample.
2 Assignments
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Accused Products
Abstract
A pressurizable holder for a sample to be examined by NMR, comprises a pressure retaining nonmagnetic tube surrounding a radio-frequency coil which in turn surrounds a space for the sample. The pressure retaining tube is formed of (i) nonmetallic electrically insulating material such as a ceramic or (ii) nonmetallic electrically insulating matrix material reinforced with electrically insulating filaments such as glass fiber, or (iii) non-metallic electrically insulating matrix material reinforced with electrically conductive filaments configured so that conductivity is anisotropic. There is good coil filling factor without constraint on wall thickness of the pressure retaining tube. Avoidance of isotropically conductive material inhibits eddy currents when an NMR spectrometer'"'"'s magnetic field gradient coils are switched on and off. The tube resists hoop stress from internal pressure. Longitudinal stress is resisted by structure connecting end pieces at the ends of the pressure retaining tube.
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Citations
20 Claims
- 1. A pressurizable holder for a sample to be examined by NMR, comprising a pressure retaining nonmagnetic tube formed of nonmetallic electrically insulating material or non-metallic electrically insulating matrix material reinforced with electrically conductive filaments configured to have less conductivity transverse to the filaments than along the filaments so as in either case to inhibit induced eddy currents, wherein the tube surrounds at least one radio-frequency coil and the at least one radio-frequency coil surrounds a space for the sample.
- 12. A pressurizable holder for a liquid sample to be examined by NMR which comprises a pressure retaining tube surrounding at least one radio-frequency coil and the at least one radio-frequency coil surrounds an electrically insulating tube to contain the liquid sample.
Specification