NMR sample rotor cooling technique
US5289130A · kind A · utility
11Cited by
8References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/307
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The frictional heating of an NMR sample spinner supported on a cylindrical gas bearing inside a cylindrical bearing stator is negated by recirculating the turbine exhaust gas over the rotor surface inside the RF coil. The technique is more effective with microturbines of relatively high insentropic efficiency. Plugs extend axially into the sample container from each end so that the sample is confined to the central region beyond the gas bearing region so the thermal gradients are minimized and RF homogeneity is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.