A Computationally Assisted Ar I Emission Line Ratio Technique to Infer Electron Energy Distribution and Determine Other Plasma Parameters in Pulsed Low-Temperature Plasma
Abstract
In the post-transient stage of a 1-Torr pulsed argon discharge, a computationally assisted diagnostic technique is demonstrated for either inferring the electron energy distribution function (EEDF) if the metastable-atom density is known (i.e., measured) or quantitatively determining the metastable-atom density if the EEDF is known. This technique, which can be extended to be applicable to the initial and transient stages of the discharge, is based on the sensitivity of both emission line ratio values to metastable-atom density, on the EEDF, and on correlating the measurements of metastable-atom density, electron density, reduced electric field, and the ratio of emission line pairs (420.1–419.8 nm or 420.1–425.9 nm) for a given expression of the EEDF, as evidenced by the quantitative agreement between the observed emission line ratio and the predicted emission line ratio. Temporal measurement of electron density, metastable-atom density, and reduced electric field are then used to infer the transient behavior of the excitation rates describing electron-atom collision-induced excitation in the pulsed positive column. The changing nature of the EEDF, as it starts off being Druyvesteyn and becomes more Maxwellian later with the increasing electron density, is key to interpreting the correlation and explaining the temporal behavior of the emission line ratiomore »
- Publication Date:
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1502511
- Grant/Contract Number:
- NA0003525
- Resource Type:
- Published Article
- Journal Name:
- Plasma
- Additional Journal Information:
- Journal Name: Plasma Journal Volume: 2 Journal Issue: 1; Journal ID: ISSN 2571-6182
- Publisher:
- MDPI AG
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Citation Formats
Franek, James, Nogami, Samuel, Koepke, Mark, Demidov, Vladimir, and Barnat, Edward. A Computationally Assisted Ar I Emission Line Ratio Technique to Infer Electron Energy Distribution and Determine Other Plasma Parameters in Pulsed Low-Temperature Plasma. Country unknown/Code not available: N. p., 2019.
Web. doi:10.3390/plasma2010007.
Franek, James, Nogami, Samuel, Koepke, Mark, Demidov, Vladimir, & Barnat, Edward. A Computationally Assisted Ar I Emission Line Ratio Technique to Infer Electron Energy Distribution and Determine Other Plasma Parameters in Pulsed Low-Temperature Plasma. Country unknown/Code not available. doi:10.3390/plasma2010007.
Franek, James, Nogami, Samuel, Koepke, Mark, Demidov, Vladimir, and Barnat, Edward. Thu .
"A Computationally Assisted Ar I Emission Line Ratio Technique to Infer Electron Energy Distribution and Determine Other Plasma Parameters in Pulsed Low-Temperature Plasma". Country unknown/Code not available. doi:10.3390/plasma2010007.
@article{osti_1502511,
title = {A Computationally Assisted Ar I Emission Line Ratio Technique to Infer Electron Energy Distribution and Determine Other Plasma Parameters in Pulsed Low-Temperature Plasma},
author = {Franek, James and Nogami, Samuel and Koepke, Mark and Demidov, Vladimir and Barnat, Edward},
abstractNote = {In the post-transient stage of a 1-Torr pulsed argon discharge, a computationally assisted diagnostic technique is demonstrated for either inferring the electron energy distribution function (EEDF) if the metastable-atom density is known (i.e., measured) or quantitatively determining the metastable-atom density if the EEDF is known. This technique, which can be extended to be applicable to the initial and transient stages of the discharge, is based on the sensitivity of both emission line ratio values to metastable-atom density, on the EEDF, and on correlating the measurements of metastable-atom density, electron density, reduced electric field, and the ratio of emission line pairs (420.1–419.8 nm or 420.1–425.9 nm) for a given expression of the EEDF, as evidenced by the quantitative agreement between the observed emission line ratio and the predicted emission line ratio. Temporal measurement of electron density, metastable-atom density, and reduced electric field are then used to infer the transient behavior of the excitation rates describing electron-atom collision-induced excitation in the pulsed positive column. The changing nature of the EEDF, as it starts off being Druyvesteyn and becomes more Maxwellian later with the increasing electron density, is key to interpreting the correlation and explaining the temporal behavior of the emission line ratio in all stages of the discharge. Similar inferences of electron density and reduced electric field based on readily available diagnostic signatures may also be afforded by this model.},
doi = {10.3390/plasma2010007},
journal = {Plasma},
number = 1,
volume = 2,
place = {Country unknown/Code not available},
year = {2019},
month = {3}
}
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.3390/plasma2010007
DOI: 10.3390/plasma2010007
Other availability
Search WorldCat to find libraries that may hold this journal
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Excitation into levels from the metastable levels of Ar
journal, May 2007
- Jung, R. O.; Boffard, John B.; Anderson, L. W.
- Physical Review A, Vol. 75, Issue 5
Determination of Ar metastable atom densities in Ar and Ar/H 2 inductively coupled low-temperature plasmas
journal, November 2013
- Fox-Lyon, N.; Knoll, A. J.; Franek, J.
- Journal of Physics D: Applied Physics, Vol. 46, Issue 48
Detection of fast electrons in pulsed argon inductively-coupled plasmas using the 420.1–419.8 nm emission line pair
journal, October 2015
- Boffard, John B.; Wang, S.; Lin, Chun C.
- Plasma Sources Science and Technology, Vol. 24, Issue 6
Electron-impact excitation of argon: Optical emission cross sections in the range of 300–2500nm
journal, November 2007
- Boffard, John B.; Chiaro, B.; Weber, Tobin
- Atomic Data and Nuclear Data Tables, Vol. 93, Issue 6
Modification of a nonlocal electron energy distribution in a bounded plasma
journal, September 2005
- DeJoseph, C.; Demidov, V.; Kudryavtsev, A.
- Physical Review E, Vol. 72, Issue 3
Metastable atom and electron density diagnostic in the initial stage of a pulsed discharge in Ar and other rare gases by emission spectroscopy
journal, February 2012
- Adams, S. F.; Bogdanov, E. A.; Demidov, V. I.
- Physics of Plasmas, Vol. 19, Issue 2
Correlating metastable-atom density, reduced electric field, and electron energy distribution in the post-transient stage of a 1-Torr argon discharge
journal, May 2015
- Franek, J. B.; Nogami, S. H.; Demidov, V. I.
- Plasma Sources Science and Technology, Vol. 24, Issue 3
Dynamics of atomic kinetics in a pulsed positive-column discharge at 100 Pa
journal, October 2016
- Franek, J. B.; Nogami, S. H.; Koepke, M. E.
- Plasma Physics and Controlled Fusion, Vol. 59, Issue 1
Reply to comment on ‘Correlating metastable-atom density, reduced electric field, and electron energy distribution in the post-transient stage of a 1 Torr argon discharge’ 2015 Plasma Sources Sci. Technol . 24 034009
journal, April 2016
- Franek, J. B.; Nogami, S. H.; Demidov, V. I.
- Plasma Sources Science and Technology, Vol. 25, Issue 3
Drift Velocities of Slow Electrons in Helium, Neon, Argon, Hydrogen, and Nitrogen
journal, February 1961
- Pack, J. L.; Phelps, A. V.
- Physical Review, Vol. 121, Issue 3
Argon 420.1–419.8 nm emission line ratio for measuring plasma effective electron temperatures
journal, January 2012
- Boffard, John B.; Jung, R. O.; Lin, Chun C.
- Journal of Physics D: Applied Physics, Vol. 45, Issue 4
2D laser-collision induced fluorescence in low-pressure argon discharges
journal, September 2015
- Barnat, E. V.; Weatherford, B. R.
- Plasma Sources Science and Technology, Vol. 24, Issue 5