Plume dynamics of laser-produced aluminum plasma in ambient nitrogen
TL;DR: In this paper, the plume dynamics of pulsed laser ablated aluminum in ambient nitrogen pressure varying from 001 to 70 Torr using ICCD images of the expanding plasma plume is reported.
About: This article is published in Applied Surface Science.The article was published on 2005-04-30. It has received 66 citations till now. The article focuses on the topics: Plume & Rayleigh–Taylor instability.
Citations
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TL;DR: In this article, the formation of colloidal suspension of zinc oxide nanoparticles by pulsed laser ablation of a zinc metal target at room temperature in different liquid environment was reported.
105 citations
TL;DR: Time-resolved imaging of a laser-ablated carbon plasma plume is reported to investigate the expansion dynamics of C(2) and CN in an ambient atmosphere of nitrogen gas at various pressures and reveals the concentration of C (2) species on the periphery of the plume, whereas CN dominates at the core of thePlume.
Abstract: We report time-resolved imaging of a laser-ablated carbon plasma plume to investigate the expansion dynamics of C2 and CN in an ambient atmosphere of nitrogen gas at various pressures. An attempt is made to locate C2 and CN species in the carbon plasma plume and correlate them with the results of spectroscopic observations. The ablated C2 and CN species decelerate due to collisions with nitrogen gas and are localized in the slower part (~300 ns) of the expanding plume. Further expansion (<700 ns) of the plasma reveals the concentration of C2 species on the periphery of the plume, whereas CN dominates at the core of the plume. However, at times greater than 700 ns, the collisions and recombination processes dominate in the plume and C2 expands slower than CN. The plume dynamics is studied in terms of shock-wave and drag models.
73 citations
TL;DR: In this paper, a comprehensive numerical model is applied to the study of the effect of ambient pressure in laser ablation, more specifically on the copper target heating, melting and vaporization, and the resulting plume expansion in the helium gas, as well as on plasma formation in the plume.
Abstract: A comprehensive numerical model is applied to the study of the effect of ambient pressure in laser ablation, more specifically on the copper target heating, melting and vaporization, and the resulting plume expansion in the helium gas, as well as on plasma formation in the plume. Under the laser pulse condition investigated [5ns full width at half maximum (FWHM) and 109W∕cm2 peak irradiance], the calculated results show that the characteristics of the surface temperature and the evaporation depth are very similar even when the ambient pressure varies greatly. The influence of the ambient pressure on the fraction of absorbed laser energy is also small. The maximum ablated material vapor density in the plume is influenced slightly by the different pressures. Before 40ns, the maximum plume temperature for various ambient pressures is in the order of a few 104K. However, the effect of ambient pressure on the plume length is quite large. A specific calculation for a Gaussian-shaped laser pulse with 6ns FWHM an...
60 citations
TL;DR: In this article, the authors studied the interaction of a laser beam with a target and next with the evaporated material with the use of thermal model, which describes both the target heating, formation of the plasma and its expansion.
Abstract: The interaction of laser beam with a target and next with the evaporated material is studied theoretically. In the case of a nanosecond laser pulse with 1064 nm wavelength, the ablation is thermal and therefore the interaction of the laser beam with a target is studied with the use of thermal model. The model which describes both the target heating, formation of the plasma and its expansion consists of equations of conservation of mass, momentum and energy and is solved with the use of Fluent software package. The calculations show a sharp increase of the plume temperature and pressure after plasma formation and following it, a considerable increase of the velocity of plasma plume. Maximum plasma pressure of 2 ×10 8 Pa, temperature of 61 500 K and front velocity of 3.8 × 10 4 m · s −1 have been found. The results show that the Mie absorption cannot be neglected in the phase of plasma formation. The shape of the plume and plasma front velocity obtained from the model are close to that observed in the experiment carried out in similar conditions.
44 citations
TL;DR: In this article, a short overview of studies performed in our research groups over the last decade on the characterization of transient plasma plumes generated by laser ablation in various temporal regimes, from nanosecond to femtosecond.
40 citations
References
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01 Jan 1967
TL;DR: The physics of high-temperature hydrodynamic phenomena is discussed in this article, where the authors present interpretations of the physical basis of shockwave and high temperature hydrodynamics and give practical guidance to those who work with these subjects.
Abstract: Physics of Shock Waves and High-Temperature Hydrodynamic Phenomena, Volume II presents interpretations of the physical basis of shockwaves and high-temperature hydrodynamic phenomena and gives practical guidance to those who work with these subjects in science and modern technology.
This volume contains chapters discussing such topics as the shockwave structure in gases; physical and chemical kinetics in hydrodynamic processes; the radiative phenomena in shock waves and in strong explosions in the air; thermal waves and shockwaves in solids; and self-similar processes in gasdynamics.
4,322 citations
Book•
31 Mar 2002TL;DR: In this paper, the authors discuss the physics of gas dynamics and classical theory of shock waves, including thermal radiation and radiant heat exchange in a medium, and some self-similar processes in gas dynamics.
Abstract: : Contents: Elements of gas dynamics and classical theory of shock waves; thermal radiation and radiant heat exchange in a medium; thermodynamic properties of gases at high temperatures; shock tubes; absorption and emission of radiation in gases at high temperatures; speed of relaxation processes in gases; structure of front of shock waves in gases; physico-chemical kinetics in hydrodynamic processes; light phenomena in shock waves and during strong explosion in air; thermal waves; shock waves in solids; certain self-similar processes in gas dynamics.
3,685 citations
10 Sep 2020
TL;DR: In this article, the authors discuss optical science, engineering, and technology topics covered include the laser and its many commercial and industrial applications, the new optical materials, gradient index optics, electro-and acousto-optics, fiber optics and communications, optical computing and pattern recognition, optical data reading, recording and storage, biomedical instrumentation, industrial robotics, integrated optics, infrared and ultraviolet systems
Abstract: This book discusses optical science, engineering, and technology Topics covered include the laser and its many commercial and industrial applications, the new optical materials, gradient index optics, electro- and acousto-optics, fiber optics and communications, optical computing and pattern recognition, optical data reading, recording and storage, biomedical instrumentation, industrial robotics, integrated optics, infrared and ultraviolet systems
643 citations
TL;DR: In this article, the propagation of laser ablation plumes from 248 nm laser-irradiated YBCO into vacuum and 100 mTorr ambient oxygen has been photographed with a gated, intensified CCD array camera system.
Abstract: The propagation of laser ablation plumes from 248 nm laser‐irradiated YBCO into vacuum and 100 mTorr ambient oxygen has been photographed with a gated, intensified CCD array camera system. The thermalization of the laser plasma and onset of shock structures due to collisions with the background gas are investigated from two‐dimensional digitized images of the visible plume emission.
363 citations
TL;DR: In this article, the dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1-10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1−10 nm SiOx particles.
Abstract: The dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1–10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1–10 nm SiOx particles. Two sets of dynamic phenomena are presented for times up to 15 s after KrF-laser ablation. Ablation of Si into heavier Ar results in a uniform, stationary plume of nanoparticles, while Si ablation into lighter He results in a turbulent ring of particles which propagates forward at 10 m/s. Nanoparticles unambiguously formed in the gas phase were collected on transmission electron microscope grids for Z-contrast imaging and electron energy loss spectroscopy analysis. The effects of gas flow on nanoparticle formation, photoluminescence, and collection are described.
318 citations