Title

Measurement of Electron Density and Temperature from Laser-induced Nitrogen Plasma at Elevated Pressure (1–6 bar)

Document Type

Article

Publication Date

11-2019

Abstract

Laser-induced plasmas experience Stark broadening and shifts of spectral lines carrying spectral signatures of plasma properties. In this paper, we report time-resolved Stark broadening measurements of a nitrogen triplet emission line at 1–6 bar ambient pressure in a pure nitrogen cell. Electron densities are calculated using the Stark broadening for different pressure conditions, which are shown to linearly increase with pressure. Additionally, using a Boltzmann fit for the triplet, the electron temperature is calculated and shown to decrease with increasing pressure. The rate of plasma cooling is observed to increase with pressure. The reported Stark broadening based plasma diagnostics in nitrogen at high pressure conditions will be significantly useful for future studies on high-pressure combustion and detonation applications.
Abstract © OSA.

Comments

The "Link to Full Text" button on this page loads the open access article, hosted at OSA. The publisher retains permissions to re-use and distribute this article at this time. © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

DOI

10.1364/OE.27.033779

Source Publication

Optics Express

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