Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target
The investigation and comparison of air plasma generated directly in the absence as well as in the presence of solid target along with microwave enhancement were reported. The plasma characteristics including emissions, size, duration, and temperature were measured using high-speed camera, optical e...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Talanta Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666831922000893 |
| _version_ | 1797811072403505152 |
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| author | Yuji Ikeda Joey Kim Soriano |
| author_facet | Yuji Ikeda Joey Kim Soriano |
| author_sort | Yuji Ikeda |
| collection | DOAJ |
| description | The investigation and comparison of air plasma generated directly in the absence as well as in the presence of solid target along with microwave enhancement were reported. The plasma characteristics including emissions, size, duration, and temperature were measured using high-speed camera, optical emission spectroscopy, and temperature approximation through spectral fitting. The laser energy required for ablation is much lower than the air breakdown energy but, the minimum energy density for air and alumina breakdown is inversely proportional to the focal lengths. The size and volume of the air plasma generated by the microwave and ablation plasma interactions were less than those of the microwave-enhanced laser-induced air plasma but was similar with standard laser-induced air plasma. When comparing the plasma lifetimes, both air plasmas (with and without a solid target) exceeded the duration of the microwave pulse input (approximately 1 ms). As the plasma lifetime is a function of electron density, shorter lifespan with the target ∼1500 ± 150 µs compared with the lifetime of the plasma without the target at ∼1800 ± 150 µs were observed. Similar results were observed for the time-series measurements of the OH and N2 second positive (N2PS) molecular emissions. OH and N2PS were not observed within the first 300 µs in the presence of the solid target; these air plasma components were only generated as a “by-product” of the microwave and ablation plasma. The rotational and vibrational temperatures were approximated by spectral fitting of simulated OH and N2PS spectra and the experimentally acquired spectra. The microwave increased the vibrational temperature in a constant rotational temperature during the expansion of the air plasma. The same trend is observed with the presence of the alumina target. |
| first_indexed | 2024-03-13T07:17:13Z |
| format | Article |
| id | doaj.art-92c311befa06496ba7b8821b6cb0d829 |
| institution | Directory Open Access Journal |
| issn | 2666-8319 |
| language | English |
| last_indexed | 2024-03-13T07:17:13Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Talanta Open |
| spelling | doaj.art-92c311befa06496ba7b8821b6cb0d8292023-06-05T04:13:11ZengElsevierTalanta Open2666-83192023-08-017100172Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al targetYuji Ikeda0Joey Kim Soriano1Corresponding author.; i-LAB., Inc., #213 KIBC Bldg., 5-5-2 Minatojima-Minami, Chuo, Kobe 650-0047, Japani-LAB., Inc., #213 KIBC Bldg., 5-5-2 Minatojima-Minami, Chuo, Kobe 650-0047, JapanThe investigation and comparison of air plasma generated directly in the absence as well as in the presence of solid target along with microwave enhancement were reported. The plasma characteristics including emissions, size, duration, and temperature were measured using high-speed camera, optical emission spectroscopy, and temperature approximation through spectral fitting. The laser energy required for ablation is much lower than the air breakdown energy but, the minimum energy density for air and alumina breakdown is inversely proportional to the focal lengths. The size and volume of the air plasma generated by the microwave and ablation plasma interactions were less than those of the microwave-enhanced laser-induced air plasma but was similar with standard laser-induced air plasma. When comparing the plasma lifetimes, both air plasmas (with and without a solid target) exceeded the duration of the microwave pulse input (approximately 1 ms). As the plasma lifetime is a function of electron density, shorter lifespan with the target ∼1500 ± 150 µs compared with the lifetime of the plasma without the target at ∼1800 ± 150 µs were observed. Similar results were observed for the time-series measurements of the OH and N2 second positive (N2PS) molecular emissions. OH and N2PS were not observed within the first 300 µs in the presence of the solid target; these air plasma components were only generated as a “by-product” of the microwave and ablation plasma. The rotational and vibrational temperatures were approximated by spectral fitting of simulated OH and N2PS spectra and the experimentally acquired spectra. The microwave increased the vibrational temperature in a constant rotational temperature during the expansion of the air plasma. The same trend is observed with the presence of the alumina target.http://www.sciencedirect.com/science/article/pii/S2666831922000893Laser-induced breakdown spectroscopyMicrowave-enhanced air plasmaPlasma ablationRo-vibrational temperatures |
| spellingShingle | Yuji Ikeda Joey Kim Soriano Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target Talanta Open Laser-induced breakdown spectroscopy Microwave-enhanced air plasma Plasma ablation Ro-vibrational temperatures |
| title | Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target |
| title_full | Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target |
| title_fullStr | Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target |
| title_full_unstemmed | Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target |
| title_short | Analysis of the characteristics of microwave-enhanced laser-induced atmospheric air plasma and ablation plasma for Al target |
| title_sort | analysis of the characteristics of microwave enhanced laser induced atmospheric air plasma and ablation plasma for al target |
| topic | Laser-induced breakdown spectroscopy Microwave-enhanced air plasma Plasma ablation Ro-vibrational temperatures |
| url | http://www.sciencedirect.com/science/article/pii/S2666831922000893 |
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