Вплив тривалості лазерного імпульсу на кінетику індукованого лазером теплового випромінювання поруватих вуглецевих матеріалів
The shape of pulse signals of laser-induced thermal emission of porous carbon material is studied with the duration of laser excitation pulses varied from 20 to 40 ns. It is found that the amplitude and duration of thermal emission pulses depend significantly on the duration of laser pulses. In part...
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| Date: | 2025 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English Ukrainian |
| Published: |
Publishing house "Academperiodika"
2025
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| Subjects: | |
| Online Access: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023485 |
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| Journal Title: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Summary: | The shape of pulse signals of laser-induced thermal emission of porous carbon material is studied with the duration of laser excitation pulses varied from 20 to 40 ns. It is found that the amplitude and duration of thermal emission pulses depend significantly on the duration of laser pulses. In particular, an increase in the duration of the emission pulses from 70 to 200 ns is recorded, which is caused by changes in the temperature distribution with depth in the surface layer of the irradiated material. Computer modeling of the processes of pulsed laser heating and of the formation of thermal emission signals is carried out. The simulation results show satisfactory agreement with the measurement results. |
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