Journal ArticleDOI
Dynamics of laser-produced carbon plasma
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TLDR
In this article, measured line profiles of several ionic species (CI-CIV) were used to infer electron density and temperature at several positions above the target surface as a function of time elapsed after the beginning of the laser pulse.Abstract:
Carbon plasmas produced by radiation from a ruby laser (wavelength 694.3 nm) focussed onto a carbon target in vacuum are studied spectroscopically with a time resolution of 40 ns. Measured line profiles of several ionic species (CI-CIV) were used to infer electron density and temperature at several positions above the target surface as function of time elapsed after the beginning of the laser pulse. The particle density at several positions above the target surface as function of time was judged from corrected line intensities. Experimental data are compared with theoretical predictions made with the effusion model of plasma expansion (Kelly R and Braren B 1991 Appl. Phys. B 53 160). The effusion model provided the relative particle density in the expanding plasma cloud as a function of initial target temperature. By comparing predicted and measured time evolution of particle density, an initial target temperature of about 125eV was inferred. The coupling of the laser beam energy to the plasma itself was inferred from the failure of the model of the direct target surface heating (Andreic Z, Henc-Bartolic V and Kunze H-J 1993 Physica Scripta 48 331) to produce the required target temperature.read more
Citations
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Journal ArticleDOI
Electron density and temperature measurements in a laser produced carbon plasma
TL;DR: In this article, the authors used line profiles of several ionic species to infer electron temperature and density at several sections located in front of the target surface, and the validity of the assumption of local thermodynamic equilibrium was discussed in light of the results obtained.
Journal ArticleDOI
Selective population of the n = 3 level of hydrogen-like carbon in two colliding laser-produced plasmas
TL;DR: The possibility that charge exchange collisions between ions of a hot plasma and a cold plasma (C 2+ ) are responsible for selectively enhanced emission of the C 5+ Balmer-alpha line emitted from the interaction zone of the two colliding laser-produced plasmas was investigated in this article.
Journal ArticleDOI
Spatial analysis of band emission from laser produced plasma
TL;DR: In this paper, the authors performed time and space resolved spectroscopic studies of the molecular band emission from C2 in the plasma produced by irradiating a graphite target with 1:06 m radiation from a Q-switched Nd:YAG laser.
Journal ArticleDOI
Temporal evolution of the laser-induced plasma generated by IR CO2 pulsed laser on carbon targets
TL;DR: In this paper, the authors focus on the temporal evolution of different atomic/ionic and molecular species over a broad spectral range from 190 to 1000 nm, and obtain velocity and kinetic energy distributions for different species from time-of-flight measurements using time-resolved optical emission spectroscopy.
Journal ArticleDOI
Droplet formation during laser sputtering of silicon
TL;DR: In this paper, a single-crystal silicon was ablated with nitrogen laser radiation wavelength 337 nm, pulse length 6 ns, maximal energy density 1.1 J/cm 2, nonuniform target energy distribution.
References
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Book
Spectral Line Broadening by Plasmas
Hans R. Griem,W. L. Barr +1 more
TL;DR: SpectSpectral Line Broadening by Plasmas as discussed by the authors provides a theoretical overview of the spectral line broadening mechanism and its application in the field of plasma spectroscopy, with a focus on spectral lines.
Book
Gmelins Handbuch der anorganischen Chemie
Leopold Gmelin,R. J. Meyer,Ekkehard Fluck,Deutsche Chemische Gesellschaft,Erich Pietsch,Alfons Kotowski,Margot Becke‐Goehring,Rudolf Warncke,Ramona Becker,Franz Peters +9 more
TL;DR: Meyer as discussed by the authors reviewed the literature on beryllium up to May 1930 and the result is a very useful compendium of information, in which results are recorded so far as possible in chronological order, rather than a textbook to guide the reader in his choice.