Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite
Streak photography of TEA-CO2 laser ablation of graphite in helium (He) and argon (Ar) background gases shows two luminous fronts, that are spatially and temporally separated, lifting off the graphite target. The velocity profile of the second front appears to follow closely that of the first lumino...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2003
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| Subjects: | |
| Online Access: | http://shdl.mmu.edu.my/2527/ http://shdl.mmu.edu.my/2527/1/1791.pdf |
| _version_ | 1848790079698370560 |
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| author | Wee-Ong , Siew Tou, T. Seong-Shan , Yap Kah-Hieng , Wong Oi-Hoong , Chin |
| author_facet | Wee-Ong , Siew Tou, T. Seong-Shan , Yap Kah-Hieng , Wong Oi-Hoong , Chin |
| author_sort | Wee-Ong , Siew |
| building | MMU Institutional Repository |
| collection | Online Access |
| description | Streak photography of TEA-CO2 laser ablation of graphite in helium (He) and argon (Ar) background gases shows two luminous fronts, that are spatially and temporally separated, lifting off the graphite target. The velocity profile of the second front appears to follow closely that of the first luminous front. The second front is absent if the laser-supported absorption wave sets in when the background gas pressure is increased to 50-mbar Ar. The optical emission spectroscopy display many of triply, doubly, and singly ionized carbon species in the expanding plume at < 0.3 mbar He, while the excited and singly ionized helium species are found in (1-30) mbar He which coincides with streak observations of strong luminous fronts. Computer simulations of the propagation trajectories of luminous fronts are carried out using the blast-wave, drag, and the snowplow models. |
| first_indexed | 2025-11-14T18:06:55Z |
| format | Article |
| id | mmu-2527 |
| institution | Multimedia University |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T18:06:55Z |
| publishDate | 2003 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | mmu-25272011-08-22T06:25:51Z http://shdl.mmu.edu.my/2527/ Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite Wee-Ong , Siew Tou, T. Seong-Shan , Yap Kah-Hieng , Wong Oi-Hoong , Chin QC Physics Streak photography of TEA-CO2 laser ablation of graphite in helium (He) and argon (Ar) background gases shows two luminous fronts, that are spatially and temporally separated, lifting off the graphite target. The velocity profile of the second front appears to follow closely that of the first luminous front. The second front is absent if the laser-supported absorption wave sets in when the background gas pressure is increased to 50-mbar Ar. The optical emission spectroscopy display many of triply, doubly, and singly ionized carbon species in the expanding plume at < 0.3 mbar He, while the excited and singly ionized helium species are found in (1-30) mbar He which coincides with streak observations of strong luminous fronts. Computer simulations of the propagation trajectories of luminous fronts are carried out using the blast-wave, drag, and the snowplow models. 2003-12 Article NonPeerReviewed application/pdf en http://shdl.mmu.edu.my/2527/1/1791.pdf Wee-Ong , Siew and Tou, T. and Seong-Shan , Yap and Kah-Hieng , Wong and Oi-Hoong , Chin (2003) Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite. IEEE Transactions on Plasma Science, 31 (6). pp. 1299-1304. ISSN 0093-3813 http://dx.doi.org/10.1109/TPS.2003.821359 doi:10.1109/TPS.2003.821359 doi:10.1109/TPS.2003.821359 |
| spellingShingle | QC Physics Wee-Ong , Siew Tou, T. Seong-Shan , Yap Kah-Hieng , Wong Oi-Hoong , Chin Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title | Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title_full | Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title_fullStr | Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title_full_unstemmed | Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title_short | Dynamics of double plume emissions in TEA-Co/sub 2/ laser ablation of graphite |
| title_sort | dynamics of double plume emissions in tea-co/sub 2/ laser ablation of graphite |
| topic | QC Physics |
| url | http://shdl.mmu.edu.my/2527/ http://shdl.mmu.edu.my/2527/ http://shdl.mmu.edu.my/2527/ http://shdl.mmu.edu.my/2527/1/1791.pdf |