Process and apparatus for preparing hyperpolarized helium gas at high pressure and application of the process
US6293111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/919
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for preparing hyperpolarized helium gas at high pressure including optical pumping at a resonant wavelength of about 1083 nanometers a helium gas formed by pure helium-3 isotope or by a mixture of helium-3 and helium-4 isotopes; and subjecting the helium gas to a magnetic field of about 0.01 to about 1 tesla during optical pumping and maintaining pressure higher than about 10 mbar and an apparatus for preparing a hyperpolarized helium gas at high pressure including a helium gas confinement cell; an excitation laser positioned to irradiate the helium gas; and means for generating a magnetic field of about 0.01 to about 1 tesla operatively connected to the confinement cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.