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Title: Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications

Abstract

This article reports new measurements of laser-induced plasma hypersonic expansion measurements of diatomic molecular cyanide (CN). Focused, high-peak-power 1064 nm Q-switched radiation of the order of 1 TW/cm 2 generated optical breakdown plasma in a cell containing a 1:1 molar gas mixture of N 2 and CO 2 at a fixed pressure of 1.1 × 10 5 Pascal and in a 100 mL/min flow of the mixture. Line-of-sight (LOS) analysis of recorded molecular spectra indicated the outgoing shockwave at expansion speeds well in excess of Mach 5. Spectra of atomic carbon confirmed increased electron density near the shockwave, and, equally, molecular CN spectra revealed higher excitation temperature near the shockwave. Results were consistent with corresponding high-speed shadowgraphs obtained by visualization with an effective shutter speed of 5 nanoseconds. In addition, LOS analysis and the application of integral inversion techniques allow inferences about the spatiotemporal plasma distribution.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Univ. of Tennessee Space Inst. (UTSI), Tullahoma, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Massachusetts, Lowell, MA (United States)
  4. Wellinq Medical (The Netherlands)
Publication Date:
Research Org.:
Nuclear Science and Security Consortium, Berkeley, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
OSTI Identifier:
1614762
Grant/Contract Number:  
NA0003180
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Molecules
Additional Journal Information:
Journal Volume: 25; Journal Issue: 3; Journal ID: ISSN 1420-3049
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; plasma diagnostics; molecular spectra; diatomic molecules; plasma spectroscopy; laser spectroscopy; laser-induced breakdown spectroscopy; optical emission spectroscopy; hypersonic expansion

Citation Formats

Parigger, Christian G., Helstern, Christopher M., Jordan, Benjamin S., Surmick, David M., and Splinter, Robert. Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications. United States: N. p., 2020. Web. doi:10.3390/molecules25030615.
Parigger, Christian G., Helstern, Christopher M., Jordan, Benjamin S., Surmick, David M., & Splinter, Robert. Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications. United States. doi:10.3390/molecules25030615.
Parigger, Christian G., Helstern, Christopher M., Jordan, Benjamin S., Surmick, David M., and Splinter, Robert. Fri . "Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications". United States. doi:10.3390/molecules25030615. https://www.osti.gov/servlets/purl/1614762.
@article{osti_1614762,
title = {Laser-Plasma Spatiotemporal Cyanide Spectroscopy and Applications},
author = {Parigger, Christian G. and Helstern, Christopher M. and Jordan, Benjamin S. and Surmick, David M. and Splinter, Robert},
abstractNote = {This article reports new measurements of laser-induced plasma hypersonic expansion measurements of diatomic molecular cyanide (CN). Focused, high-peak-power 1064 nm Q-switched radiation of the order of 1 TW/cm 2 generated optical breakdown plasma in a cell containing a 1:1 molar gas mixture of N 2 and CO 2 at a fixed pressure of 1.1 × 10 5 Pascal and in a 100 mL/min flow of the mixture. Line-of-sight (LOS) analysis of recorded molecular spectra indicated the outgoing shockwave at expansion speeds well in excess of Mach 5. Spectra of atomic carbon confirmed increased electron density near the shockwave, and, equally, molecular CN spectra revealed higher excitation temperature near the shockwave. Results were consistent with corresponding high-speed shadowgraphs obtained by visualization with an effective shutter speed of 5 nanoseconds. In addition, LOS analysis and the application of integral inversion techniques allow inferences about the spatiotemporal plasma distribution.},
doi = {10.3390/molecules25030615},
journal = {Molecules},
issn = {1420-3049},
number = 3,
volume = 25,
place = {United States},
year = {2020},
month = {1}
}

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Cited by: 2 works
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