scholarly journals Approaching the “cold curve” in laser-driven shock wave experiment of a matter precompressed by a partially perforated diamond anvil

2012 ◽  
Vol 31 (1) ◽  
pp. 73-79 ◽  
Author(s):  
N. Nissim ◽  
S. Eliezer ◽  
M. Werdiger ◽  
L. Perelmutter
Keyword(s):  
Shock Wave ◽  
Diamond Anvil Cell ◽  
Compression Curve ◽  
One Dimensional ◽  
Cold Compression ◽  
Relative Contribution ◽  
Order Of Magnitude ◽  
Diamond Anvil ◽  
Hugoniot Curves ◽  
Shock Wave Experiment

AbstractThis paper suggests a novel route to approach the cold compression curve in laser-plasma induced shock waves. This effect is achieved with a precompression in a diamond anvil cell (DAC). In order to keep the necessary structure of one dimensional shock wave it is required to use a diamond anvil cell with a partially perforated diamond anvil. Precompression pressures of about 50 GPa, that are an order of magnitude higher than the currently reported pressures, are possible to obtain with presentley existing diamond anvil cell technology. The precompressed Hugoniot of Al was calculated for different precompression pressures and it was found that at precompression pressure of 50 GPa the Hugoniot follows the “cold curve” up to about 2 Mbar and 5.2 g/cc. Furthermore, the thermal relative contribution on the Hugoniot curves is calculated.

Growth and High Pressure Investigation of (C60)n@SWNT

2012 ◽  
Vol 442 ◽  
pp. 26-30
Author(s):  
Yong Gang Zou ◽  
Xiao Hui Ma ◽  
Quan Lin Shi ◽  
Guo Jun Liu ◽  
Qing Xue Sui ◽  
...  
Keyword(s):  
High Pressure ◽  
Laser Irradiation ◽  
Diamond Anvil Cell ◽  
Pressure Effects ◽  
Diffusion Method ◽  
Uv Laser ◽  
One Dimensional ◽  
Diamond Anvil ◽  
830 Nm Laser

The (C60)n@SWNT (peapod) samples were prepared by vapor diffusion method. We performed the high pressure Raman measurements on the peapod samples by using a Mao-Bell type diamond anvil cell (DAC). In the In situ high pressure experiments, the peapod samples were exposed under UV laser line irradiation. The polymerization of C60 molecules in SWNT cave under both laser irradiation and pressure effects has been studied. The Raman spectra of the released samples from high pressure indicated that C60s form one-dimensional orthorhombic polymer. For the Raman measurements, two different excitation wavelengths were used, 325 nm laser and 830 nm laser.

DIAMOND ANVIL CELL ≡ SHOCK WAVE GUN ?

1984 ◽  
Vol 45 (C8) ◽  
pp. C8-117-C8-120
Author(s):  
M. Madon ◽  
J. Peyronneau ◽  
J. P. Poirier
Keyword(s):  
Shock Wave ◽  
Diamond Anvil Cell ◽  
Diamond Anvil

Gas-ionizing shock and combustion waves in magnetogasdynamics

1962 ◽  
Vol 14 (3) ◽  
pp. 405-419 ◽  
Author(s):  
J. B. Helliwell
Keyword(s):  
Shock Wave ◽  
Electromagnetic Field ◽  
Shock Waves ◽  
Combustion Wave ◽  
Density Ratio ◽  
Combustion Waves ◽  
One Dimensional ◽  
Inviscid Gas ◽  
Density Ratios ◽  
Hugoniot Curves

Some general properties of one-dimensional deflagration waves in a non-conducting inviscid gas at rest are discussed when ionization of the gas takes place across a shock wave which precedes the flame front, and electromagnetic fields are present. The direction of wave propagation, the electric field and magnetic field are taken as a mutually orthogonal triad of vectors. The jump relationships across the gas-ionizing shock wave and magnetogasdynamic combustion wave are investigated and the two Hugoniot curves analysed in detail in the pressure-specific volume plane. The possible types of wave are indicated for arbitrary magnitudes of the upstream electromagnetic field. It is shown that weak gasionizing shock waves cannot exist. For suitably chosen electromagnetic field strenghts the density ratio across the shock wave may be greater than the ordinary gasdynamic limit and, in such cases, the pressure and density ratios are related in an inverse manner, in contrast to the behaviour for ordinary gasdynamic or magnetogasdynamic shock waves. The magnetogasdynamic combustion wave has similar properties to that in ordinary gasdynamics.

Thermodynamics and one dimensional shock waves in materials with memory

1966 ◽  
Vol 292 (1431) ◽  
pp. 562-574 ◽  
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Long Range ◽  
Materials With Memory ◽  
One Dimensional ◽  
Small Intensity ◽  
Linear Viscoelastic ◽  
Hugoniot Curves ◽  
With Memory ◽  
Arbitrary Intensity

We consider one dimensional shock waves in materials which do not conduct heat. We show that most of the classical theory of Hugoniot curves can be broadly generalized to substances having long range, non-linear, viscoelastic memory. For example, the presence of memory does not destroy the conclusion that the jump in entropy across a shock wave of small intensity is of order three or higher in the jump in the strain. The theorems of Bethe and Weyl on shocks of arbitrary intensity also can be generalized to materials with memory.

The formation of gas hydrates under shock wave impact on the bubble media (two-dimensional case)

2010 ◽  
Vol 7 ◽  
pp. 90-97
Author(s):  
M.N. Galimzianov ◽  
I.A. Chiglintsev ◽  
U.O. Agisheva ◽  
V.A. Buzina
Keyword(s):  
Shock Wave ◽  
Gas Hydrates ◽  
Hydrate Formation ◽  
Dimensional Case ◽  
Two Dimensional ◽  
Wave Impact ◽  
Bubble Liquid ◽  
One Dimensional ◽  
Bubble Media ◽  
Main Factors

Formation of gas hydrates under shock wave impact on bubble media (two-dimensional case) The dynamics of plane one-dimensional shock waves applied to the available experimental data for the water–freon media is studied on the base of the theoretical model of the bubble liquid improved with taking into account possible hydrate formation. The scheme of accounting of the bubble crushing in a shock wave that is one of the main factors in the hydrate formation intensification with increasing shock wave amplitude is proposed.

scholarly journals Bulk modulus of H2O across the ice VII–ice X transition measured by time-resolved x-ray diffraction in dynamic diamond anvil cell experiments

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
A. S. J. Méndez ◽  
F. Trybel ◽  
R. J. Husband ◽  
G. Steinle-Neumann ◽  
H.-P. Liermann ◽  
...  
Keyword(s):  
Bulk Modulus ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Diamond Anvil

High temperature diamond anvil cell with the laser heating

1989 ◽  
Vol 1 (5-6) ◽  
pp. 337-340 ◽  
Author(s):  
M. I. Eremets ◽  
V. V. Struzhkin ◽  
I. A. Trojan
Keyword(s):  
High Temperature ◽  
Laser Heating ◽  
Diamond Anvil Cell ◽  
Diamond Anvil

scholarly journals Phase transitions beyond post-perovskite in NaMgF3 to 160 GPa

2019 ◽  
Vol 116 (39) ◽  
pp. 19324-19329 ◽  
Author(s):  
Rajkrishna Dutta ◽  
Eran Greenberg ◽  
Vitali B. Prakapenka ◽  
Thomas S. Duffy
Keyword(s):  
Phase Transitions ◽  
Diamond Anvil Cell ◽  
Extrasolar Planets ◽  
High Pressures ◽  
Model System ◽  
Similar Sequence ◽  
Deep Interior ◽  
Diamond Anvil ◽  
Binary Compounds ◽  
Pressure Phase

Neighborite, NaMgF3, is used as a model system for understanding phase transitions in ABX3 systems (e.g., MgSiO3) at high pressures. Here we report diamond anvil cell experiments that identify the following phases in NaMgF3 with compression to 162 GPa: NaMgF3 (perovskite) → NaMgF3 (post-perovskite) → NaMgF3 (Sb2S3-type) → NaF (B2-type) + NaMg2F5 (P21/c) → NaF (B2) + MgF2 (cotunnite-type). Our results demonstrate the existence of an Sb2S3-type post-post-perovskite ABX3 phase. We also experimentally demonstrate the formation of the P21/c AB2X5 phase which has been proposed theoretically to be a common high-pressure phase in ABX3 systems. Our study provides an experimental observation of the full sequence of phase transitions from perovskite to post-perovskite to post-post-perovskite followed by 2-stage breakdown to binary compounds. Notably, a similar sequence of transitions is predicted to occur in MgSiO3 at ultrahigh pressures, where it has implications for the mineralogy and dynamics in the deep interior of large, rocky extrasolar planets.

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