Inductively coupled plasma torch with laminar flow cooling
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Nov 20, 1989
filing date -
Nov 20, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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