Electron-CO excitation and ionization cross sections for plasma modeling

Laricchiuta, Annarita; Pietanza, Lucia Daniela; Capitelli, M.; Colonna, G.

doi:10.1088/1361-6587/aae16b

Cited by 5 publications

(9 citation statements)

References 56 publications

(97 reference statements)

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“…Furthermore, it is shown that even in swarm Fig. 8 BEB cross sections for electron impact ionization of the CO(X 1 Σ + g ) ground state from v=0 (dashed line) and from v=40 (dotted line) and total ionization cross section for CO(a 3 Π) calculated by Laricchiuta et al [217]. The insertion shows the detail of the different threshold energies conditions inelastic and superelastic collisions involving rotationally excited levels, as well as superelastic collisions with the first vibrational excited level, have to be taken into account to accurately calculate the electron energy distribution function.…”

Section: Comentioning

confidence: 96%

“…This implies that the elastic and rotational cross sections proposed in [209] are not accurate per se, but can nevertheless be used in the consistent set to obtain an accurate calculation of the EEDF with a two-term Boltzmann solver. The CO electron impact ionization cross sections of the CO(X 1 Σ + g ) ground state (vibrational state resolved) and of the CO(a 3 Π) electronic excited state were calculated by Laricchiuta et al [217] by using the binary-encounter-Bethe (BEB) model. The corresponding results are reported in Fig.…”

Section: Comentioning

confidence: 99%

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Advances in non-equilibrium $$\hbox {CO}_2$$ plasma kinetics: a theoretical and experimental review

et al. 2021

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Numerous applications have required the study of CO2 plasmas since the 1960s, from CO2 lasers to spacecraft heat shields. However, in recent years, intense research activities on the subject have restarted because of environmental problems associated with CO2 emissions. The present review provides a synthesis of the current state of knowledge on the physical chemistry of cold CO2 plasmas. In particular, the different modeling approaches implemented to address specific aspects of CO2 plasmas are presented. Throughout the paper, the importance of conducting joint experimental, theoretical and modeling studies to elucidate the complex couplings at play in CO2 plasmas is emphasized. Therefore, the experimental data that are likely to bring relevant constraints to the different modeling approaches are first reviewed. Second, the calculation of some key elementary processes obtained with semi-empirical, classical and quantum methods is presented. In order to describe the electron kinetics, the latest coherent sets of cross section satisfying the constraints of "electron swarm" analyses are introduced, and the need for self-consistent calculations for determining accurate electron energy distribution function (EEDF) is evidenced. The main findings of the latest zero-dimensional (0D) global models about the complex chemistry of CO2 and its dissociation products in different plasma discharges are then given, and full state-to-state (STS) models of only the vibrational-dissociation kinetics developed for studies of spacecraft shields are described. Finally, two important points for all applications using CO2 containing plasma are discussed: the role of surfaces in contact with the plasma, and the need for 2D/3D models to capture the main features of complex reactor geometries including effects induced by fluid dynamics on the plasma properties. In addition to bringing together the latest advances in the description of CO2 non-equilibrium plasmas, the results presented here also highlight the fundamental data that are still missing and the possible routes that still need to be investigated.

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Section: Comentioning

confidence: 96%

Section: Comentioning

confidence: 99%

Advances in non-equilibrium $$\hbox {CO}_2$$ plasma kinetics: a theoretical and experimental review

et al. 2021

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“…In Ref. [29] ab initio unrestricted Hartree Fock (UHF) calculations were performed, with the aug-cc-pVTZ basis set, in the D2h symmetry point group at the equilibrium geometry of the metastable N…”

Section: Resultsmentioning

confidence: 99%

“…The method, attractively combining simplicity and accuracy, was successfully and extensively applied to many atomic and molecular systems in the ground state, including fusion-relevant species containing heavy elements as beryllium/tungsten oxides, hydrides and nitrides [27], and also to the ionization of low-lying excited states of carbon, nitrogen and oxygen atoms [28]. Here, the results recently obtained for to the metastable states of N 2 and CO [29] are reviewed and new results for H 2 molecule are presented, discussing the comparison with other theoretical methods.…”

Section: Introductionmentioning

confidence: 96%

Electron Impact Ionization of Metastable States of Diatomic Molecules

Laricchiuta

Celiberto

Colonna

2021

Atoms

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“…During gas metal arc welding in the CO 2 shielding gas, CO 2 dissociates to CO and O 2 in the arc since its dissociation degree significantly rises at 2000 K [37]. CO reacts with the plasma in the arc [38,39], and since CO ionization energy is higher than that of CO 2 , the arc voltage increases and hence the arc current.…”

Section: Resultsmentioning

confidence: 99%

The Coatings Breakdown Products Influence on the Gas Metal Arc Welding Parameters

et al. 2020

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The installation and renovation works of steel structures are often performed using gas metal arc welding. Thereby, the welded elements of these structures are frequently protected by a variety of primers and coatings, especially in shipbuilding. Complex nonequilibrium physical and chemical processes occurring under the influence of high temperatures and electric arc discharge, as well as the presence of the products that affect the welding parameters, have a significant impact on the joints’ quality. Experimental studies on the coatings’ breakdown products influence on the gas metal arc welding parameters were performed with epoxy, alkyd, polyacrylate, polyvinyl butyral primers, epoxy zinc filled, vinyl chloride, vinyl isobutyl, and organosilicate coatings. The peculiarity of welding current waveform parameters was studied using oscillograms processing. It was found that the main coatings breakdown products that influence the current waveform are oxygen and carbon monoxide.

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Electron-CO excitation and ionization cross sections for plasma modeling

Cited by 5 publications

References 56 publications

Advances in non-equilibrium $$\hbox {CO}_2$$ plasma kinetics: a theoretical and experimental review

Advances in non-equilibrium $$\hbox {CO}_2$$ plasma kinetics: a theoretical and experimental review

Electron Impact Ionization of Metastable States of Diatomic Molecules

The Coatings Breakdown Products Influence on the Gas Metal Arc Welding Parameters

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