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.
Source Publication
Optics Express
Recommended Citation
Ashwin P. Rao, Mark Gragston, Anil K. Patnaik, Paul S. Hsu, and Michael B. Shattan, "Measurement of electron density and temperature from laser-induced nitrogen plasma at elevated pressure (1–6 bar)," Opt. Express 27, 33779-33788 (2019).
Comments
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement, and shared on AFIT Scholar in accordance with OSA's open access policies. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Sourced from the version of record as cited below and linked in the DOI.
[*] Author A. Rao was enrolled in an AFIT Master of Science program at the time of this publication.