Particles formation in an expanding plasma

Lescoute, E.; Hallo, L.; Chimier, B.; Hebert, David G.; Tikhonchuk, V. T.; Stenz, C.; Chevalier, Jean-Marc; Rullier, Jean-Luc; Palmier, Stéphanie

doi:10.1140/epjst/e2009-01135-2

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…Descriptions of the experiments planned on NDCX-I may be found in [8]). Part of the evolution of the expanding material will be through the two phase (vapor/liquid) regime, and the evolution of the droplets and bubbles in super heated metals is of practical interest [11]. The droplet evolution has been modeled using simple kinetic rate equations, that suggest that most droplets should persist in the outflowing expanding material.…”

Section: Ndcx-i Planar Targetsmentioning

confidence: 99%

Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Barnard

Armijo

Bailey

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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Abstract. Hydrodynamic simulations have been carried out using the multi-physics radiation hydrodynamics code HYDRA and the simplified one-dimensional hydrodynamics code DISH. We simulate possible targets for a near-term experiment at LBNL (the Neutralized Drift Compression Experiment, NDCX) and possible later experiments on a proposed facility (NDCX-II) for studies of warm dense matter and inertial fusion energy related beam-target coupling. Simulations of various target materials (including solids and foams) are presented. Experimental configurations include single pulse planar metallic solid and foam foils. Concepts for double-pulsed and ramped-energy pulses on cryogenic targets and foams have been simulated for exploring direct drive beam target coupling, and concepts and simulations for collapsing cylindrical and spherical bubbles to enhance temperature and pressure for warm dense matter studies

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Section: Ndcx-i Planar Targetsmentioning

confidence: 99%

Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Barnard

Armijo

Bailey

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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“…The laser plume undergoes a rapid spatial expansion, which is slowed down due to its compression in the surrounding atmosphere. Typical models of nanosecond laser ablation consist of several stages including the laser heating and evaporation of the target, the laser heating and expansion of the plasma plume and the condensation process giving rise to the formation of NPs [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Influence of the reactive atmosphere on the formation of nanoparticles in the plasma plume induced by nanosecond pulsed laser irradiation of metallic targets at atmospheric pressure and high repetition rate

Girault

Garrec

Mitchell

et al. 2016

Applied Surface Science

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International audienceThe influence of a reactive atmosphere on the formation of nanoparticles (NPs) in the plasma plume generated by nanosecond pulsed laser irradiation of metal targets (Ti, Al, Ag) was probed in-situ using Small Angle X-ray Scattering (SAXS). Air and different O2-N2 gas mixtures were used as reactive gas within atmospheric pressure. SAXS results showed the formation of NPs in the plasma-plume with a mean radius varying in the 2-5 nm range. A decrease of the NPs size with increasing the O2 percentage in the O2-N2 gas mixture was also showed. Ex-situ observations by transmission electron microscopy and structural characterizations by x-ray diffraction and Raman spectroscopy were also performed for powders collected in experiments done using air as ambient gas. The stability of the different metal oxides is discussed as being a key parameter influencing the formation of NPs in the plasma-plume (E-MRS 2015 Spring Meeting Symposium CC: “Laser and plasma processing for advanced applications in material science”, 11-15 May 2015, Lille (France

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“…The introduction of bubbles by pulsed laser heating of a liquid-solid interface for manipulating organic molecules has been comprehensively studied [6][7][8] . An ultrafast laser beam with pulse width in the order of femto seconds is one of the promising tools to induce nucleation at low supersaturation [9][10][11] . Its effectiveness to control growth of various kinds of materials including proteins 9-10 and nanostructures [11][12] has been confirmed.…”

Section: Introductionmentioning

confidence: 99%

“…An ultrafast laser beam with pulse width in the order of femto seconds is one of the promising tools to induce nucleation at low supersaturation [9][10][11] . Its effectiveness to control growth of various kinds of materials including proteins 9-10 and nanostructures [11][12] has been confirmed. However, the ultrafast laser induced condensation in unsaturated media still remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast laser induced condensation of molecules

Mohanty

2011

SPIE Proceedings

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We have found that ultrafast laser microbeam inducing bubble(s) can lead to condensation of molecules in solution. The laser microbeam was generated by coupling a near infrared mode-locked femtosecond (fs) laser beam onto an inverted fluorescence microscope and focusing it with a 100X objective. Fluorescence imaging revealed that collapse of cavitation micro-bubbles created high-concentration regions of dye molecules in the aqueous solution. Further, twophoton excitation of the molecules under the ultrafast laser microbeam showed significant increase in fluorescence intensity as a function of laser exposure time without micro-bubble formation. This may be attributed to nano-bubble formation and or conformational change in the molecules under intense laser intensity at the focused spot to significantly enhance the molar absorptivity (extinction coefficient) or fluorescence excitation cross-section. High-concentration regions of the dye molecules are found to be retained for a longer period of time and therefore provide an opportunity for collection of these condensed molecules using microcapilary and/or for further analysis.

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Particles formation in an expanding plasma

Cited by 9 publications

References 3 publications

Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Ion beam heated target simulations for warm dense matter physics and inertial fusion energy

Influence of the reactive atmosphere on the formation of nanoparticles in the plasma plume induced by nanosecond pulsed laser irradiation of metallic targets at atmospheric pressure and high repetition rate

Ultrafast laser induced condensation of molecules

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