Carbon Swan Spectra Measurements Following Breakdown of Nitro Compound Explosive Simulants

Michael J. Witte; Christian G. Parigger; Nathan A. Bullock; Jonathan A. Merten; Susan D. Allen

doi:10.1366/13-07230

Carbon Swan Spectra Measurements Following Breakdown of Nitro Compound Explosive Simulants

Michael J. Witte, Christian G. Parigger, Nathan A. Bullock, Jonathan A. Merten, Susan D. Allen

College of Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Our measurements of micro-plasma following laser-induced optical breakdown of nitro compound explosive simulants, here 3-nitrobenzoic acid, show well-developed molecular spectra during the first several hundreds of nanoseconds. Analysis of recorded carbon spectra is accomplished using accurate line strengths for the diatomic molecular Swan system. Presence of hydrogen-beta allows us to infer electron density in the plasma evolution. Computational challenges include accounting for background variation and appropriate modeling of hydrogen embedded in molecular spectra. Recorded and computed spectra agree nicely for time delays on the order of 1.6 μs from optical breakdown when using a single temperature for local thermodynamic equilibrium plasma.

Original language	American English
Journal	Applied Spectroscopy
Volume	68
DOIs	https://doi.org/10.1366/13-07230
State	Published - 2014

Keywords

atomic spectroscopy
molecular spectroscopy
plasma diagnostics
laser-induced breakdown
laser-induced chemistry
laser ablation

Disciplines

Atomic, Molecular and Optical Physics

Access to Document

10.1366/13-07230License: Unspecified

Cite this

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title = "Carbon Swan Spectra Measurements Following Breakdown of Nitro Compound Explosive Simulants",

abstract = " Our measurements of micro-plasma following laser-induced optical breakdown of nitro compound explosive simulants, here 3-nitrobenzoic acid, show well-developed molecular spectra during the first several hundreds of nanoseconds. Analysis of recorded carbon spectra is accomplished using accurate line strengths for the diatomic molecular Swan system. Presence of hydrogen-beta allows us to infer electron density in the plasma evolution. Computational challenges include accounting for background variation and appropriate modeling of hydrogen embedded in molecular spectra. Recorded and computed spectra agree nicely for time delays on the order of 1.6 μs from optical breakdown when using a single temperature for local thermodynamic equilibrium plasma.",

keywords = "atomic spectroscopy, molecular spectroscopy, plasma diagnostics, laser-induced breakdown, laser-induced chemistry, laser ablation",

author = "Witte, {Michael J.} and Parigger, {Christian G.} and Bullock, {Nathan A.} and Merten, {Jonathan A.} and Allen, {Susan D.}",

year = "2014",

doi = "10.1366/13-07230",

language = "American English",

volume = "68",

journal = "Applied Spectroscopy",

issn = "1943-3530",

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TY - JOUR

T1 - Carbon Swan Spectra Measurements Following Breakdown of Nitro Compound Explosive Simulants

AU - Witte, Michael J.

AU - Parigger, Christian G.

AU - Bullock, Nathan A.

AU - Merten, Jonathan A.

AU - Allen, Susan D.

PY - 2014

Y1 - 2014

N2 - Our measurements of micro-plasma following laser-induced optical breakdown of nitro compound explosive simulants, here 3-nitrobenzoic acid, show well-developed molecular spectra during the first several hundreds of nanoseconds. Analysis of recorded carbon spectra is accomplished using accurate line strengths for the diatomic molecular Swan system. Presence of hydrogen-beta allows us to infer electron density in the plasma evolution. Computational challenges include accounting for background variation and appropriate modeling of hydrogen embedded in molecular spectra. Recorded and computed spectra agree nicely for time delays on the order of 1.6 μs from optical breakdown when using a single temperature for local thermodynamic equilibrium plasma.

AB - Our measurements of micro-plasma following laser-induced optical breakdown of nitro compound explosive simulants, here 3-nitrobenzoic acid, show well-developed molecular spectra during the first several hundreds of nanoseconds. Analysis of recorded carbon spectra is accomplished using accurate line strengths for the diatomic molecular Swan system. Presence of hydrogen-beta allows us to infer electron density in the plasma evolution. Computational challenges include accounting for background variation and appropriate modeling of hydrogen embedded in molecular spectra. Recorded and computed spectra agree nicely for time delays on the order of 1.6 μs from optical breakdown when using a single temperature for local thermodynamic equilibrium plasma.

KW - atomic spectroscopy

KW - molecular spectroscopy

KW - plasma diagnostics

KW - laser-induced breakdown

KW - laser-induced chemistry

KW - laser ablation

U2 - 10.1366/13-07230

DO - 10.1366/13-07230

M3 - Article

SN - 1943-3530

VL - 68

JO - Applied Spectroscopy

JF - Applied Spectroscopy

ER -