Inductively coupled plasma torch with laminar flow cooling
US5012065A · kind A · utility
18Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved inductively coupled gas plasma torch. The torch includes inner and outer quartz sleeves and tubular insert snugly fitted between the sleeves. The insert includes outwardly opening longitudinal channels. Gas flowing through the channels of the insert emerges in a laminar flow along the inside surface of the outer sleeve, in the zone of plasma heating. The laminar flow cools the outer sleeve and enables the torch to operate at lower electrical power and gas consumption levels additionally, the laminar flow reduces noise levels in spectroscopic measurements of the gaseous plasma.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.