Some Features of Ejecta from the Surface of a Shocked Lead Sample
| Autor: | A. S. Kuchkareva, S. V. Frolov, O. L. Krivonos, B. I. Tkachenko, E. V. Levkina, A. B. Georgievskaya, A. R. Gavrish, N. V. Nevmerzhitskii, N. B. Davydov, V. A. Raevskii, E. D. Sen’kovskii, E. A. Sotskov, K. V. Anisiforov, E. V. Bodrov |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Shock wave Materials science General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology General Chemistry Laser 01 natural sciences Molecular physics Spectral line law.invention Fuel Technology law Free surface 0103 physical sciences Particle Irradiation 010306 general physics Ejecta Intensity (heat transfer) |
| Zdroj: | Combustion, Explosion, and Shock Waves. 54:585-592 |
| ISSN: | 1573-8345 0010-5082 |
| DOI: | 10.1134/s0010508218050118 |
| Popis: | This paper presents the results of an experimental study of particle ejection into low (0.05 atm) vacuum from a narrow (0.2–0.8 mm) rough (Rz = 20–50 μm) surface of a lead sample subjected to a shock wave of intensity about 17 and 34 GPa. The ejecta was recorded with a video camera in the microscopic mode with short laser irradiation. Due to the small optical thickness of the ejecta, particle spectra at approximately 80% of the ejecta height measured from the front of the ejecta were obtained. It was found that when lead is in the solid state (17 GPa), jets consisting of a lot of particles are ejected from the rough surface; when the lead is in the liquid state (34 GPa), a lot of thin (from 7 μm) microcumulative jets are ejected from the metal surface, and with time they break up into particles. |
| Databáze: | OpenAIRE |
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