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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 29,
  • Issue 6,
  • pp. 477-481
  • (1975)

Mixing of Ambient Nitrogen in a Flowing Argon Inductively Coupled Plasma Discharge

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Abstract

The concentration of argon and nitrogen are measured by gas chromatography for an inductively coupled plasma discharge in argon which is surrounded by a nitrogen sheath. The mixing of nitrogen with the argon discharge is substantially different than cold-gas mixing when no discharge is present. The formation of a toroidal discharge with a central flow further decreases the mixing of nitrogen with the discharge. More than a few percent nitrogen mixed into the argon discharge drastically alters the plasma temperature distribution.

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