Inductively coupled plasma torch with laminar flow cooling

Patent · Tue Apr 30 00:00:00 EDT 1991

OSTI ID:867795

Rayson, Gary D ^[1]; Shen, Yang ^[1]

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1. Las Cruces, NM

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.

• Assignee: New Mexico State University Technology Transfer Corporation (Las Cruces, NM)
• Patent Number(s): US 5012065
• Application Number: 07/440,233
• OSTI ID: 867795
• Country of Publication: United States
• Language: English

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