Model of the expansion of a low-temperature laser plasma in a vacuum

1992 ◽  
Vol 33 (1) ◽  
pp. 1-7
Author(s):  
A. N. Polyanichev
Keyword(s):  
Low Temperature ◽  
Laser Plasma

Optical properties of low-temperature magnesium laser plasma

1986 ◽  
Vol 7 (4) ◽  
pp. 345-351 ◽  
Author(s):  
V. V. Lebedev ◽  
V. M. Plyasulya ◽  
V. P. Chebotaev
Keyword(s):  
Optical Properties ◽  
Low Temperature ◽  
Laser Plasma

Low-temperature atmospheric pressure argon plasma treatment and hybrid laser-plasma ablation of barite crown and heavy flint glass

2012 ◽  
Vol 51 (17) ◽  
pp. 3847 ◽  
Author(s):  
Christoph Gerhard ◽  
Sophie Roux ◽  
Stephan Brückner ◽  
Stephan Wieneke ◽  
Wolfgang Viöl
Keyword(s):  
Low Temperature ◽  
Plasma Treatment ◽  
Laser Plasma ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Flint Glass ◽  
Plasma Ablation

scholarly journals Investigations of laser interaction with high-Z targets

1992 ◽  
Vol 10 (4) ◽  
pp. 689-696 ◽  
Author(s):  
W. Mróz ◽  
A. Nowak-Goroszczenko ◽  
J. Wołowski ◽  
E. Woryna
Keyword(s):  
Low Temperature ◽  
Laser Plasma ◽  
Thermal Plasma ◽  
Low Temperature Plasma ◽  
Laser Interaction ◽  
Plasma Parameters ◽  
Temperature Plasma ◽  
X Ray ◽  
Order Of Magnitude ◽  
Two Temperature

This article presents the tendency of the changes of Nd-laser plasma parameters in dependence upon increasing target atomic numbers. In the experiment, the following targets — (C8H8)n, SiO2, Al, Cu, Ta, and Au — were investigated. For targets with Z higher than 13, the two-temperature plasma is observed with temperatures Te =500–600 eV and Te≅ 100 eV. Energy carried by ions from the low-temperature plasma can be higher than half the total energy carried by ions. The number of ions from low-temperature, X-ray-heated plasma can be by an order of magnitude higher than the number of ions from thermal plasma (Te = 500–600 eV).

Computer modeling of unsteady gas-dynamical and optical phenomena in low-temperature laser plasma

1991 ◽  
Author(s):  
Mikhail F. Kanevskii ◽  
L. A. Bolshov ◽  
S. Y. Chernov ◽  
Valerii A. Vorob'ev
Keyword(s):  
Low Temperature ◽  
Computer Modeling ◽  
Laser Plasma ◽  
Optical Phenomena

High-speed nanocrystallization of copper in a low-temperature laser plasma

2011 ◽  
Vol 56 (8) ◽  
pp. 419-422 ◽  
Author(s):  
K. A. Bogonosov ◽  
S. N. Maksimovskii
Keyword(s):  
Low Temperature ◽  
Laser Plasma ◽  
High Speed

Ultraviolet Absorption of Refractory Elements by a Dual Laser Plasma Method

1988 ◽  
Vol 102 ◽  
pp. 243-246
Author(s):  
J.T. Costello ◽  
W.G. Lynam ◽  
P.K. Carroll
Keyword(s):  
Absorption Spectra ◽  
Laser Plasma ◽  
Optical Pulse ◽  
Ionic Species ◽  
Neutral Species ◽  
Plasma Method ◽  
Plasma Technique ◽  
Refractory Elements ◽  
Delay Times ◽  
Dual Laser

AbstractThe dual laser-produced plasma technique for the study of ionic absorption spectra has been developed by the use of two Q-switched ruby lasers to enable independent generation of the absorbing and back-lighting plasmas. Optical pulse handling is used in the coupling cicuits to enable reproducible pulse delays from 250 nsec. to 10 msec, to be achieved. At delay times > 700 nsec. spectra of essentially pure neutral species are observed. The technique is valuable, not only for obtaining the neutral spectra of highly refractory and/or corrosive materials but also for studying behaviour of ionic species as a function of time. Typical spectra are shown in Fig. 1.

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

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