Optical emission of a plasma from low-density targets irradiated with coherence-controllable laser radiation

2017 ◽  
Vol 47 (2) ◽  
pp. 101-105 ◽  
Author(s):  
A A Fronya ◽  
N G Borisenko ◽  
V N Puzyrev ◽  
A T Sahakyan ◽  
A N Starodub ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Optical Emission ◽  
Low Density

scholarly journals Oil-based mud waste reclamation and utilisation in low-density polyethylene composites

2020 ◽  
Vol 38 (12) ◽  
pp. 1331-1344
Author(s):  
Shohel Siddique ◽  
Kyari Yates ◽  
Kerr Matthews ◽  
Laszlo J Csetenyi ◽  
James Njuguna
Keyword(s):  
Inductively Coupled Plasma ◽  
Oil And Gas ◽  
Microscopic Analysis ◽  
Optical Emission ◽  
Fluorescence Analysis ◽  
Xrd Analysis ◽  
Low Density Polyethylene ◽  
Emission Spectrometry ◽  
Low Density ◽  
X Ray

Oil-based mud (OBM) waste from the oil and gas exploration industry can be valorised to tailor-made reclaimed clay-reinforced low-density polyethylene (LDPE) nanocomposites. This study aims to fill the information gap in the literature and to provide opportunities to explore the effective recovery and recycling techniques of the resources present in the OBM waste stream. Elemental analysis using inductively coupled plasma–optical emission spectrometry (ICP-OES) and X-ray fluorescence analysis, chemical structural analysis by Fourier transform infrared (FTIR) spectroscopy, and morphological analysis of LDPE/organo-modified montmorillonite (LDPE/MMT) and LDPE/OBM slurry nanocomposites by scanning electron microscopy (SEM) have been conducted. Further analysis including calorimetry, thermogravimetry, spectroscopy, microscopy, energy dispersive X-ray analysis and X-ray diffraction (XRD) was carried out to evaluate the thermo-chemical characteristics of OBM waste and OBM clay-reinforced LDPE nanocomposites, confirming the presence of different clay minerals including inorganic salts in OBM slurry powder. The microscopic analysis revealed that the distance between polymer matrix and OBM slurry filler is less than that of MMT, which suggests better interfacial adhesion of OBM slurry compared with the adhesion between MMT and LDPE matrix. This was also confirmed by XRD analysis, which showed the superior delamination structure OBM slurry compared with the structure of MMT. There is a trend noticeable for both of these fillers that the nanocomposites with higher percentage filler contents (7.5 and 10.0 wt% in this case) were indicated to act as a thermal conductive material. The heat capacity values of nanocomposites decreased about 33% in LDPE with 7.5 wt% MMT and about 17% in LDPE with 10.0 wt% OBM slurry. It was also noted, for both nanocomposites, that the residue remaining after 1000°C increases with the incremental wt% of fillers in the nanocomposites. There is a big difference in residue amount (in %) left after thermogravimetric analysis in the two nanocomposites, indicating that OBM slurry may have significant influence in decomposing LDPE matrix; this might be an interesting area to explore in the future. The results provide insight and opportunity to manufacture waste-derived renewable nanocomposites with enhanced structural and thermal properties.

Laser-radiation volume absorber and x-ray converter based on low-density beryllium

2001 ◽  
Author(s):  
N. G. Borisenko ◽  
Vladimir V. Gorlevsky ◽  
A. I. Gromov ◽  
Sergei Y. Gus'kov ◽  
Valeriy M. Dorogotovtsev ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Low Density ◽  
X Ray

Interaction of laser radiation with a low-density structured absorber

2016 ◽  
Vol 122 (2) ◽  
pp. 256-276 ◽  
Author(s):  
V. B. Rozanov ◽  
D. V. Barishpol’tsev ◽  
G. A. Vergunova ◽  
N. N. Demchenko ◽  
E. M. Ivanov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Low Density

A Mechanistic Study of the Interaction of Ultraviolet Laser Radiation with Low Density Polymers

1986 ◽  
Vol 75 ◽  
Author(s):  
Philip J. Hargis
Keyword(s):  
Laser Radiation ◽  
Laser Fluence ◽  
Emission Spectra ◽  
Mechanistic Study ◽  
Etch Depth ◽  
Low Density ◽  
Foam Density ◽  
Absorption Mechanism ◽  
Linear Absorption ◽  
Ultraviolet Laser

AbstractUltraviolet laser radiation at 248 nm and 266 nm was used to ablate low density (0.04 to 0.14 g/cm3) microcellular polystyrene and TPX foams at laser fluences between 0.1 and 1000 J/cm2, The dependence of the etch rate on laser fluence and foam density is consistent with a linear absorption mechanism for the initial stages of polystyrene ablation. Studies of the morphology and chemical composition of the ablated foams as a function of laser fluence and foam density show that the degree of melting increases at the higher foam densities. Blackbody and radical specie contributions to optical emission from the ablated foam were readily resolved for correlation with laser fluence, foam density, absorption spectra, and etch depth. Temperatures in excess of 3000 °K are calculated from emission spectra observed during the ablation of polystyrene foams. From this data we conclude that chemical and thermal changes in the ablated foam are influenced by the absorption spectrum as well as the density of the foam.

Absorption and scattering of high-power laser radiation in low-density porous media

1999 ◽  
Vol 88 (3) ◽  
pp. 441-448 ◽  
Author(s):  
A. É. Bugrov ◽  
S. Yu. Gus’kov ◽  
V. B. Rozanov ◽  
I. N. Burdonskii ◽  
V. V. Gavrilov ◽  
...  
Keyword(s):  
Porous Media ◽  
Laser Radiation ◽  
High Power ◽  
Low Density ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser Radiation

Optical Emission from a Low-Density Argon Plasma

1981 ◽  
Vol 9 (2) ◽  
pp. 63-67
Author(s):  
Robert E. McIntosh ◽  
Mark S. Kotfila
Keyword(s):  
Argon Plasma ◽  
Optical Emission ◽  
Low Density

Scattering of laser radiation at the heating of low density foam targets

1997 ◽  
Author(s):  
S. Yu. Guskov ◽  
Yu. S. Kas’anov ◽  
M. O. Koshevoi ◽  
V. B. Rozanov ◽  
A. A. Rupasov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Low Density

Interaction of high-power laser radiation with low-density polymer aerogels

2017 ◽  
Vol 47 (6) ◽  
pp. 495-502 ◽  
Author(s):  
Ch Kaur ◽  
Sh Chaurasia ◽  
N G Borisenko ◽  
A S Orekhov ◽  
P Leshma ◽  
...  
Keyword(s):  
Laser Radiation ◽  
High Power ◽  
Low Density ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser Radiation

scholarly journals Scattering and transmission of laser radiation at the heating of low-density foam targets

1999 ◽  
Vol 17 (2) ◽  
pp. 287-291 ◽  
Author(s):  
S.Yu. GUS'KOV ◽  
Yu.S. KAS'ANOV ◽  
M.O. KOSHEVOI ◽  
V.B. ROZANOV ◽  
A.A. RUPASOV ◽  
...  
Keyword(s):  
Experimental Study ◽  
Laser Radiation ◽  
Laser Heating ◽  
Mass Velocity ◽  
Critical Density ◽  
Low Density

Experimental study of the radiation scattered at the laser heating of low-density foam targets and transmitted through the targets is presented. The scattered and transmitted radiations were investigated using spectrometers and streak cameras providing spatial, angular, spectral and temporal resolutions that enabled us to study the dynamics of the process of burning-through of the thick foam targets, the velocities of the plasma critical density motion as well as mass velocity of the plasma.

Scattering of laser radiation at the heating of low density foam targets

2002 ◽  
Author(s):  
S.Y. Guskov ◽  
Y.S. Kas'anov ◽  
M.O. Koshevoi ◽  
V.B. Rozanov ◽  
A.A. Rupasov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Low Density
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