Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup>
Comprehensive collisional radiative (CR) models have been developed for the diagnostic of argon plasma using Ar and Ar<sup>+</sup> emission lines. The present CR models consist of 42 and 114 fine-structure levels of Ar and Ar<sup>+</sup>, respectively. Various populating and...
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/2218-2004/10/4/118 |
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| author | Neelam Shukla Reetesh Kumar Gangwar Rajesh Srivastava |
| author_facet | Neelam Shukla Reetesh Kumar Gangwar Rajesh Srivastava |
| author_sort | Neelam Shukla |
| collection | DOAJ |
| description | Comprehensive collisional radiative (CR) models have been developed for the diagnostic of argon plasma using Ar and Ar<sup>+</sup> emission lines. The present CR models consist of 42 and 114 fine-structure levels of Ar and Ar<sup>+</sup>, respectively. Various populating and depopulating mechanisms are incorporated in the model. A complete set of electron-impact fine-structure resolved excitation cross-sections for different excited levels in Ar and Ar<sup>+</sup> are used, which are obtained by employing relativistic distorted wave theory. Along with this, the electron-impact ionization, radiation trapping, diffusion, and three-body recombination are also considered. Further, to demonstrate the applicability of the present CR model, we applied it to characterize the Helicon-plasma utilizing the optical emission spectroscopy measurements. The key plasma parameters, such as electron density and electron temperature, are obtained using their measured Ar and Ar<sup>+</sup> emission line intensities. Our results are in reasonable agreement with their anticipated estimates. The matching of our calculated intensities of the different Ar and Ar<sup>+</sup> lines shows excellent agreement with the measured intensities at various powers. |
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| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-09T17:20:07Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-62e2f03cfffc45b7a747db096480fb5a2023-11-24T13:13:56ZengMDPI AGAtoms2218-20042022-10-0110411810.3390/atoms10040118Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup>Neelam Shukla0Reetesh Kumar Gangwar1Rajesh Srivastava2Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaDepartment of Physics & CAMOST, Indian Institute of Technology Tirupati, Tirupati 517619, IndiaDepartment of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaComprehensive collisional radiative (CR) models have been developed for the diagnostic of argon plasma using Ar and Ar<sup>+</sup> emission lines. The present CR models consist of 42 and 114 fine-structure levels of Ar and Ar<sup>+</sup>, respectively. Various populating and depopulating mechanisms are incorporated in the model. A complete set of electron-impact fine-structure resolved excitation cross-sections for different excited levels in Ar and Ar<sup>+</sup> are used, which are obtained by employing relativistic distorted wave theory. Along with this, the electron-impact ionization, radiation trapping, diffusion, and three-body recombination are also considered. Further, to demonstrate the applicability of the present CR model, we applied it to characterize the Helicon-plasma utilizing the optical emission spectroscopy measurements. The key plasma parameters, such as electron density and electron temperature, are obtained using their measured Ar and Ar<sup>+</sup> emission line intensities. Our results are in reasonable agreement with their anticipated estimates. The matching of our calculated intensities of the different Ar and Ar<sup>+</sup> lines shows excellent agreement with the measured intensities at various powers.https://www.mdpi.com/2218-2004/10/4/118Ar and Ar<sup>+</sup> collisional radiative modelrelativistic distorted wave theoryelectron-impact excitation cross-sectionsargon plasma |
| spellingShingle | Neelam Shukla Reetesh Kumar Gangwar Rajesh Srivastava Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> Atoms Ar and Ar<sup>+</sup> collisional radiative model relativistic distorted wave theory electron-impact excitation cross-sections argon plasma |
| title | Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> |
| title_full | Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> |
| title_fullStr | Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> |
| title_full_unstemmed | Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> |
| title_short | Diagnostics of Argon Plasma Using Reliable Electron-Impact Excitation Cross Sections of Ar and Ar<sup>+</sup> |
| title_sort | diagnostics of argon plasma using reliable electron impact excitation cross sections of ar and ar sup sup |
| topic | Ar and Ar<sup>+</sup> collisional radiative model relativistic distorted wave theory electron-impact excitation cross-sections argon plasma |
| url | https://www.mdpi.com/2218-2004/10/4/118 |
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