Research on Temporal and Spatial Evolution of Reheating Double-Pulse Laser-Induced Plasma
In order to investigate the emission enhancement mechanisms of reheating Double Pulse Laser-Induced Breakdown Spectroscopy (DP-LIBS), single pulse LIBS (SP-LIBS) and reheating DP-LIBS were carried out on an alloy steel sample respectively. The plasma emission was collected by an Echelle spectrometer with high resolution, while the plasma structure was monitored via fast-photography. The temporal and spatial evolutio ns of the plasma generated by SP-LIBS and reheating DP-LIBS were being studied. It is found that the plasma temperature in reheating DP-LIBS was higher than that of SP-LIBS, and there was a turning point for the decay rate of plasma temperature in reheating DP-LIBS when the delay time was equal to the interpulse time of DP-LIBS. Moreover, the inte nsity of the plasma image was increased by reheating DP-LIBS, and the height and width of the central region of the plasma were increased about 23.5% and 15.1% respectively. The results of spatial distribution showed that the intensity of Fe II and N I lines in the plasma were obviously enhanced by reheating DP-LIBS when the distance from the sample surface was larger than 0.6 mm. While the intensity enhancement for Fe I lines were little, even in some positio ns the intensity of Fe I lines decreased. The plasma temperature of double-pulse configuration was about 2 000 K higher than that of SP-LIBS, and a larger hot region in the plasma was generated. It is evidenced that the emission enhancement mechanisms in reheating DP-LIBS is that the second laser pulse re-excited the plasma induced by the first laser pulse, and the higher plasma temperature resulted from the re-exciting process.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2016 |
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| Erschienen: |
2016 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:36 |
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| Enthalten in: |
Guang pu xue yu guang pu fen xi = Guang pu - 36(2016), 3 vom: 20. März, Seite 817-22 |
| Sprache: |
Chinesisch |
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| Beteiligte Personen: |
Wang, Jing-ge [VerfasserIn] |
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| Themen: |
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| Anmerkungen: |
Date Completed 15.09.2016 Date Revised 12.07.2016 published: Print Citation Status PubMed-not-MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM262274566 |
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| 100 | 1 | |a Wang, Jing-ge |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Research on Temporal and Spatial Evolution of Reheating Double-Pulse Laser-Induced Plasma |
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| 500 | |a Date Completed 15.09.2016 | ||
| 500 | |a Date Revised 12.07.2016 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a In order to investigate the emission enhancement mechanisms of reheating Double Pulse Laser-Induced Breakdown Spectroscopy (DP-LIBS), single pulse LIBS (SP-LIBS) and reheating DP-LIBS were carried out on an alloy steel sample respectively. The plasma emission was collected by an Echelle spectrometer with high resolution, while the plasma structure was monitored via fast-photography. The temporal and spatial evolutio ns of the plasma generated by SP-LIBS and reheating DP-LIBS were being studied. It is found that the plasma temperature in reheating DP-LIBS was higher than that of SP-LIBS, and there was a turning point for the decay rate of plasma temperature in reheating DP-LIBS when the delay time was equal to the interpulse time of DP-LIBS. Moreover, the inte nsity of the plasma image was increased by reheating DP-LIBS, and the height and width of the central region of the plasma were increased about 23.5% and 15.1% respectively. The results of spatial distribution showed that the intensity of Fe II and N I lines in the plasma were obviously enhanced by reheating DP-LIBS when the distance from the sample surface was larger than 0.6 mm. While the intensity enhancement for Fe I lines were little, even in some positio ns the intensity of Fe I lines decreased. The plasma temperature of double-pulse configuration was about 2 000 K higher than that of SP-LIBS, and a larger hot region in the plasma was generated. It is evidenced that the emission enhancement mechanisms in reheating DP-LIBS is that the second laser pulse re-excited the plasma induced by the first laser pulse, and the higher plasma temperature resulted from the re-exciting process | ||
| 650 | 4 | |a English Abstract | |
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Fu, Hong-bo |e verfasserin |4 aut | |
| 700 | 1 | |a Ni, Zhi-bo |e verfasserin |4 aut | |
| 700 | 1 | |a He, Wen-gan |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Xing-long |e verfasserin |4 aut | |
| 700 | 1 | |a Dong, Feng-zhong |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Guang pu xue yu guang pu fen xi = Guang pu |d 1997 |g 36(2016), 3 vom: 20. März, Seite 817-22 |w (DE-627)NLM09368360X |x 1000-0593 |7 nnns |
| 773 | 1 | 8 | |g volume:36 |g year:2016 |g number:3 |g day:20 |g month:03 |g pages:817-22 |
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