scholarly journals Excitation of Periodical Shock Waves in Solid–State Optical Media (Yb:YAG, Glass) at SBS of Focused Low–Coherent Pump Radiation: Structure Changes, Features of Lasing

10.5772/20284 ◽  
2011 ◽  
Author(s):  
N.E. Bykovsky ◽  
Yu.V. Senatsky
Keyword(s):  
Solid State ◽  
Shock Waves ◽  
Pump Radiation ◽  
Optical Media ◽  
Structure Changes

Chemical structure changes of lacustrine Type-II kerogen under semi-open pyrolysis as investigated by solid-state 13C NMR and FT-IR spectroscopy

2020 ◽  
Vol 116 ◽  
pp. 104348 ◽  
Author(s):  
Lianhua Hou ◽  
Weijiao Ma ◽  
Xia Luo ◽  
Shizhen Tao ◽  
Ping Guan ◽  
...  
Keyword(s):  
Solid State ◽  
Ir Spectroscopy ◽  
13C Nmr ◽  
Chemical Structure ◽  
Type Ii ◽  
Structure Changes ◽  
Ft Ir ◽  
Ft Ir Spectroscopy ◽  
Solid State 13C Nmr

scholarly journals Two-dimensional dispersive shock waves in dissipative optical media

2013 ◽  
Vol 38 (5) ◽  
pp. 790 ◽  
Author(s):  
Yaroslav V. Kartashov ◽  
Anatoly M. Kamchatnov
Keyword(s):  
Shock Waves ◽  
Two Dimensional ◽  
Optical Media

Solid-State 13C NMR Characterization of Irradiation-Cross-Linked Natural Rubber

1987 ◽  
Vol 41 (3) ◽  
pp. 441-446 ◽  
Author(s):  
Dwight J. Patterson ◽  
Jack L. Koenig
Keyword(s):  
Solid State ◽  
Natural Rubber ◽  
Mobile Phase ◽  
Chain Scission ◽  
Structure Changes ◽  
Nmr Characterization ◽  
Cross Links ◽  
Gamma Irradiated ◽  
Trans Structure

Solid-state 13C NMR was used to characterize the structure changes produced in gamma irradiation in natural rubber. The structure of the irradiated natural rubber was found to be heterogeneous, consisting of a mobile phase and a semi-rigid phase. Cis-trans chain isomerization was detected in the mobile phase of the gamma-irradiated samples. The CP/MAS spectra of the more rigid phase contained resonances due to quaternary carbons arising from cross-links and vinyl end groups caused by main chain scission. The calculated values of β and G( X) agreed with earlier published results. Peroxide-cured natural rubber of an equivalent amount of network density showed a higher amount of trans structure than did the gamma-irradiated natural rubber.

Chemical structure changes in kerogen from bituminous coal in response to dike intrusions as investigated by advanced solid-state 13C NMR spectroscopy

2013 ◽  
Vol 108 ◽  
pp. 53-64 ◽  
Author(s):  
Xiaoyan Cao ◽  
Mark A. Chappell ◽  
Arndt Schimmelmann ◽  
Maria Mastalerz ◽  
Yuan Li ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Chemical Structure ◽  
Bituminous Coal ◽  
13C Nmr Spectroscopy ◽  
Structure Changes ◽  
Solid State 13C Nmr

scholarly journals Thermal resonance effect by a strong shock wave in D–T fuel side-on ignition by laser-driven block acceleration

2019 ◽  
Vol 37 (4) ◽  
pp. 332-340
Author(s):  
S. Payun ◽  
B. Malekynia
Keyword(s):  
Shock Wave ◽  
Solid State ◽  
Shock Waves ◽  
Resonance Effect ◽  
Strong Shock ◽  
State Density ◽  
Resonance Phenomenon ◽  
Inertial Confinement ◽  
Nuclear Heat ◽  
Ignition Threshold

AbstractIgnition with the help of a shock wave is performed by the interaction of accelerated plasma block by a petawatt-picosecond (PW-ps) laser, with a solid-state density fuel that it is a new possibility for achieving controlled fusion by inertial confinement. The unexpected production of plasma blocks provides new access to the ignition of solid-state density fuel according to the Chu hydrodynamic model. When the produced plasma block by the PW-ps laser hits the main fuel due to the density differences between the plasma block and the main fuel of the shock wave, this progressive wave increases the density of solidified fuels and reduces the energy of the ignition threshold and increases the flammability. In this study, a new discovery of shock waves has been observed leading to the resonance phenomenon. Nuclear heat shock waves resonance in the side-on ignition of fuel in the internal layer of fuel at x ≠ 0 appears from the exact solution of the hydrodynamic equations with respect to the density profile. This important finding achieves the required ignition temperature for solid-state fuel deuterium–tritium (D–T) in certain energies, with a significant increase due to the resonance of thermonuclear waves. This discovery will facilitate practical experiments on the ignition of advanced solid-state fuels with the accelerated plasma blocks by a PW-ps laser at certain energies.

PHYSICOCHEMICAL TRANSFORMATIONS OF ALUMINUM AND QUARTZ POWDERS MIXTURE UNDER LOADING BY SPHERICAL CONVERGING SHOCK WAVES

2010 ◽  
Vol 24 (06n07) ◽  
pp. 730-737
Author(s):  
N. I. TALUTS ◽  
A. V. DOBROMYSLOV ◽  
E. A. KOZLOV
Keyword(s):  
Solid State ◽  
Shock Waves ◽  
Chemical Reaction ◽  
Amorphous State ◽  
Pure Silicon ◽  
Converging Shock Waves ◽  
Composition And Structure ◽  
Pressure Scale ◽  
State Chemical ◽  
Evolution Of Oxygen

The phase composition and structure of a mixture of aluminum and quartz powders taken in a ratio of 1:1 have been studied after loading by spherical converging shock waves. A number of concentric layers (zones) have been observed in the sample after shock-wave loading. The presence of several zones in the sample reflects the specific features of the processes occurring in different pressure ranges. It has been established that pressures below ~45 GPa cause only additional compacting of the material and deformation of aluminum and quartz. In this case, the quartz grain size substantially decreases up to the transition into the X-ray amorphous state. The attainment of a pressure of ~45 GPa initiates the solid-state reaction of SiO 2 decomposition, which leads to the precipitation of pure silicon and the evolution of oxygen. The beginning of the silicon precipitation and the chemical reaction of Al 2 O 3 formation are separated over the pressure scale. The critical pressure, which is necessary for the solid-state chemical reaction of the Al 2 O 3 formation, is about 50 GPa.

Solid-State Synthesis of ZnTe in Shock Waves

2006 ◽  
Vol 42 (1) ◽  
pp. 116-123 ◽  
Author(s):  
D. L. Gur'ev ◽  
Yu. A. Gordopolov ◽  
S. S. Batsanov
Keyword(s):  
Solid State ◽  
Shock Waves ◽  
Solid State Synthesis
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