Anticipative temperature regulation of cryogenic NMR probes
US7309987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2005 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Oct 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/34092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In some embodiments, a nuclear magnetic resonance (NMR) method comprises generating an indicator of an anticipated time-averaged power for a radio-frequency (RF) pulse set, and anticipatively adjusting a cooling supplied by a cryogenic cooling fluid to an RF coil according to the indicator of the anticipated time-averaged power. The cryogenic cooling adjustment may be performed using a cryogenic fluid heater and/or a mass flow controller disposed in the cryogenic fluid path. The time difference between the start of the cooling adjustment and the start of the RF pulse set is set to be equal to the difference in timescales between the cooling effect of the cooling adjustment and the heating effect of the RF pulse set on the RF coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.