Dynamic of Nanopowder Production During Laser Target Evaporation


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Abstract

The paper presents the results of research focusing on the processes occurring when powerful laser radiation interacts with refractory oxide targets. To visualize formation of the nanoparticle cloud and large fragments, the authors used laser illumination and laser monitor methods. Image analysis allowed studying the dynamic of cloud formation from nanoparticles and determining the nature of its interaction with surrounding air. It was established that it is possible to mostly avoid the formation and ejection of a multitude of drops from the crater, if the target is evaporated by fiber laser radiation pulses with duration of no more than 200 μs. With pulse duration of 120 μs, peak power of 600 W and radiation power density of 0.4 MW/cm2, mass nanoparticle output was 30 mass%, which is 1.4 more than when the target is affected by continuous radiation of the same power.

About the authors

M. V. Trigub

V. E. Zuev Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences; National Research Tomsk Polytechnic University

Author for correspondence.
Email: trigub@tpu.ru
Russian Federation, Tomsk; Tomsk

V. V. Platonov

Institute of Electrophysics of the Ural Branch of the Russian Academy of Sciences

Email: trigub@tpu.ru
Russian Federation, Yekaterinburg

K. V. Fedorov

National Research Tomsk Polytechnic University

Email: trigub@tpu.ru
Russian Federation, Tomsk

G. S. Evtushenko

V. E. Zuev Institute of Atmospheric Optics of the Siberian Branch of the Russian Academy of Sciences; National Research Tomsk Polytechnic University

Email: trigub@tpu.ru
Russian Federation, Tomsk; Tomsk

V. V. Osipov

Institute of Electrophysics of the Ural Branch of the Russian Academy of Sciences

Email: trigub@tpu.ru
Russian Federation, Yekaterinburg

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