Reduction in eddy current losses in electrically conducting sample materials with the assistance of special NMR sample tubes
US8153084B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2006 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Aug 3, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2300/0858
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sample tube for an NMR probe head, which extends along a z axis and has an internal cavity that extends in an axial direction of the z axis, is open to the outside at the axially upper end, is closed at the axially lower end and contains a liquid NMR sample substance during operation, wherein the cross-sectional surface of this cavity extending perpendicularly to the z axis and parallel to the xy coordinate plane has an elongated shape in the direction of the x axis with maximum dimensions a in the y direction and b in the x direction, wherein a<b, is characterized in that the cross-sectional surface of the sample tube, which extends perpendicularly to the z axis and is parallel to the xy coordinate plane has a circular outer shape. Sample tubes of this type provide a particularly large signal-to-noise ratio, can be easily inserted into a conventional cryogenic probe head and be axially and radially positioned therein by existing precision centering devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.