Method and system for increasing the lifespan of a plasma
US8742667B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 6, 2009 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Jun 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G13/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and a system for increasing the lifespan of a plasma obtained in the atmosphere. The method includes the following steps: emitting a femtosecond laser pulse, referred to as a first pulse, generating a column of plasma by the filamentation phenomenon, and emitting a second YAG laser pulse, focused by way of an axicon on a line in the plasma column, the energy of the photons of the second laser pulse being greater than the attachment energy of the electrons in the plasma to neutral molecules such as oxygen molecules. The duration of the second pulse is greater than the duration of the first pulse, and the delay between the two pulses is greater than one microsecond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.