Simulation of ultrafast bursts of subpicosecond pulses: In pursuit of efficiency M. E. Povarnitsyn, P. R. Levashov, D. V. Knyazev
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ArticleContent type: Текст Media type: электронный Subject(s): субпикосекундные импульсы | импульсная лазерная абляция | двухтемпературные гидродинамические моделиGenre/Form: статьи в журналах Online resources: Click here to access online
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Applied physics letters Vol. 112, № 5. P. 051603-1-051603-5Abstract: Using a hydrodynamic two-temperature model, we simulate multi-pulse laser ablation of an aluminum bulk target. The results of modeling demonstrate that the effectiveness of the multi-pulse ablation increases an order of magnitude in comparison to a single-pulse ablation of the same energy, while the repetition rate grows up to several GHz because the material surface does not cool down substantially between successive pulses. To prevent the shielding and suppression effects, the fluence of each pulse in the burst should have a subthreshold value to avoid the generation of slow moving ablated condensed-phase nanolayers. The obtained results are consistent with recent experiments on ablation by ultrafast bursts of ultrashort pulses.
This work was supported by the Russian Science Foundation, Grant No. 16-19-10700. The authors acknowledge the JIHT RAS Supercomputer Centre, the Joint Supercomputer Center of the Russian Academy of Sciences, and the Shared Resource Center “Far Eastern Computing Resource” IACP FEB RAS for providing computing time.
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Using a hydrodynamic two-temperature model, we simulate multi-pulse laser ablation of an aluminum bulk target. The results of modeling demonstrate that the effectiveness of the multi-pulse ablation increases an order of magnitude in comparison to a single-pulse ablation of the same energy, while the repetition rate grows up to several GHz because the material surface does not cool down substantially between successive pulses. To prevent the shielding and suppression effects, the fluence of each pulse in the burst should have a subthreshold value to avoid the generation of slow moving ablated condensed-phase nanolayers. The obtained results are consistent with recent experiments on ablation by ultrafast bursts of ultrashort pulses.
This work was supported by the Russian Science Foundation, Grant No. 16-19-10700. The authors acknowledge the JIHT RAS Supercomputer Centre, the Joint Supercomputer Center of the Russian Academy of Sciences, and the Shared Resource Center “Far Eastern Computing Resource” IACP FEB RAS for providing computing time.
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