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View article: Development of a Photonic Doppler Velocimetry Diagnostic Operating at 830 nm
Development of a Photonic Doppler Velocimetry Diagnostic Operating at 830 nm Open
Photonic Doppler Velocimetry, originally developed at 1550 nm, has become over the past decades a standard diagnostic for studying material response to dynamic loading or for studying clouds of ejecta. However, it is known that its velocit…
View article: Impulse coupling enhancement of aluminum targets under laser irradiation in a soft polymer confined geometry
Impulse coupling enhancement of aluminum targets under laser irradiation in a soft polymer confined geometry Open
Laser pulses were applied to a target mounted on a ballistic pendulum to study the momentum imparted by a laser shock impact. Photonic Doppler Velocimetry was used to assess the momentum imparted by each laser pulse. To increase the moment…
View article: Momentum Transfer During Laser-Driven Cratering Experiments
Momentum Transfer During Laser-Driven Cratering Experiments Open
The use of high power pulsed lasers to simulate hypervelocity impacts (HVI) was proposed several decades ago [1] and several studies were devoted to the analogy between laser-driven and real projectile cratering experiments. These studies,…
View article: Laser Simulation of Hypervelocity Impact into Porous Graphite
Laser Simulation of Hypervelocity Impact into Porous Graphite Open
Introduction The use of laser-driven shocks is a very interesting alternative to extend the range of impacts accessible by launchers. When a high-power laser is focused on an absorbing target, the first few micrometers of matter vaporizes.…
View article: Laser-Driven Cratering into Porous Graphite: Experimental Investigation on Ejecta Distribution
Laser-Driven Cratering into Porous Graphite: Experimental Investigation on Ejecta Distribution Open
Introduction The sustainability of satellites is threatened by the growing number of space debris in low-Earth orbit [1]. Moreover, Earth is also at risk from the perpetual threat of collision with a celestial body. Understanding the behav…
View article: Solid-to-plasma transition of polystyrene induced by a nanosecond laser pulse within the context of inertial confinement fusion
Solid-to-plasma transition of polystyrene induced by a nanosecond laser pulse within the context of inertial confinement fusion Open
Laser direct drive (LDD) inertial confinement fusion (ICF) involves irradiating a spherical target of thermonuclear fuel coated with an ablator, usually made of polystyrene. Laser energy absorption near the target surface leads to matter a…
View article: Hugoniot measurements of the 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) formulation T2 up to 70 GPa
Hugoniot measurements of the 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) formulation T2 up to 70 GPa Open
We present shock Hugoniot measurements of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) T2 formulation up to 70 GPa. Despite the use of very thin samples, strong reactivity is evidenced above 30 GPa, indicating that our high pressure points …
View article: High power continuous wave laser heating of graphite in a high temperature range up to 3800 K
High power continuous wave laser heating of graphite in a high temperature range up to 3800 K Open
As graphite is an important material for several applications, the evaluation of its properties at very high temperatures is of major importance. Conducting studies at temperatures >2800 K is, however, very challenging, and the amount o…
View article: Numerical investigation of the interactions between a low-hypersonic shock wave and a water droplet: VOF and DI methods comparison
Numerical investigation of the interactions between a low-hypersonic shock wave and a water droplet: VOF and DI methods comparison Open
In this paper, we present the hydrodynamic mechanisms which occur between a low-hypersonic shock wave and a millimetric water droplet.To do so, two numerical models, based respectively on the Volume of Fluid (VOF) and Diffuse Interfaces (D…
View article: Velocity and mass density of the ejecta produced from sinusoidal grooves in laser shock-loaded tin
Velocity and mass density of the ejecta produced from sinusoidal grooves in laser shock-loaded tin Open
When a shock wave of several tens of GPa breaks out at a free surface, a material is ejected ahead of this surface. The amount and velocity of such ejecta depend on the breakout pressure, state of the released material (solid, liquid, or m…
View article: Laser induced plasma characterization in direct and water confined regimes: new advances in experimental studies and numerical modelling
Laser induced plasma characterization in direct and water confined regimes: new advances in experimental studies and numerical modelling Open
Optimization of the laser shock peening (LSP) and LASer Adhesion Test (LASAT) processes requires control of the laser-induced target's loading. Improvements to optical and laser technologies allow plasma characterization to be performed wi…
View article: White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy
White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy Open
Time-resolved x-ray absorption experiments have been performed on shocked tantalum. Using a single 100 ps synchrotron x-ray pulse, nanosecond-lived equilibrium states of shocked solid Ta have been measured by L-3-edge absorption spectrosco…
View article: Simulation of laser-driven cratering experiments on aluminum
Simulation of laser-driven cratering experiments on aluminum Open
After a brief description of the physical principles involved in the cratering process, the authors present a specific methodology to simulate laser-driven cratering experiments performed with a long pulse duration (100 ns) and a small foc…
View article: Characterization of the ballistic properties of ejecta from laser shock-loaded samples using high resolution picosecond imaging
Characterization of the ballistic properties of ejecta from laser shock-loaded samples using high resolution picosecond imaging Open
Anticipating the generation of high velocity debris from shock-loaded specimens and the damage that their impacts may cause to nearby equipment is a major safety issue in applications involving shock waves, such as pyrotechnics [1] or iner…
View article: CVD diamond detector with interdigitated electrode pattern for time-of-flight energy-loss measurements of low-energy ion bunches
CVD diamond detector with interdigitated electrode pattern for time-of-flight energy-loss measurements of low-energy ion bunches Open
Ion stopping experiments in plasma for beam energies of few hundred keV per nucleon are of great interest to benchmark the stopping-power models in the context of inertial confinement fusion and high-energy-density physics research. For th…
View article: Effects of ZrCuAl bulk metallic glasses Poisson’s ratios on spalling process induced by laser shock
Effects of ZrCuAl bulk metallic glasses Poisson’s ratios on spalling process induced by laser shock Open
International audience
View article: Picosecond radiography combined with other techniques to investigate microjetting from laser shock-loaded grooves
Picosecond radiography combined with other techniques to investigate microjetting from laser shock-loaded grooves Open
International audience
View article: Numerical Simulations of Laser-Driven Cratering Experiments into Porous Graphite
Numerical Simulations of Laser-Driven Cratering Experiments into Porous Graphite Open
We present the results of an experimental campaign conducted on the LULI2000 laser facility. Semi-infinite targets of a commercial grade of porous graphite were submitted to high-power laser irradiation inorder to generate craters. A 15 ns…
View article: Experimental implementation of shock waves propagation using multi-materials stacks – Application to bonded assemblies evaluation by laser adhesion test
Experimental implementation of shock waves propagation using multi-materials stacks – Application to bonded assemblies evaluation by laser adhesion test Open
The Laser Adhesion Test (LASAT) process is based on propagating calibrated shock waves generated by laser within a multi-materials stack to evaluate interface mechanical strength. In this work we present results from laser shocks experimen…
View article: Investigating Ramp Wave Propagation inside Silica Glass with Laser Experiments and Molecular Simulations
Investigating Ramp Wave Propagation inside Silica Glass with Laser Experiments and Molecular Simulations Open
Under elastic shock compression silica glass exhibits a very specific behaviour. A shock propagating inside a material is usually seen as the propagation of a discontinuity. However in silica glass, shocks are unstable and lead to the prop…
View article: 2D characterization of the pressure generated by an intense laser pulse on an aluminum target
2D characterization of the pressure generated by an intense laser pulse on an aluminum target Open
High intensity lasers are a very powerful tool to study the mechanical properties of materials, such as equation of state, or dynamic fracture. In the first case, laser experiments are usualy designed so as to allow 1D interpretation of th…
View article: Laser-induced cratering of a 3DCC material at mesoscale: Experiments and simulations
Laser-induced cratering of a 3DCC material at mesoscale: Experiments and simulations Open
This study concerns the damaging of a 3-Dimension Carbon/Carbon (3DCC) composite material under dynamic loading. Experiments were performed with a laser facility delivering energies between 13 and 40 J with 100 nanoseconds pulse duration. …
View article: Ejecta from periodical grooves in tin foils under laser-driven shock loading
Ejecta from periodical grooves in tin foils under laser-driven shock loading Open
International audience
View article: Localized atomic segregation in the spalled area of a Zr<sub>50</sub>Cu<sub>40</sub>Al<sub>10</sub> bulk metallic glasses induced by laser-shock experiment
Localized atomic segregation in the spalled area of a Zr<sub>50</sub>Cu<sub>40</sub>Al<sub>10</sub> bulk metallic glasses induced by laser-shock experiment Open
Laser-shock experiments were performed on a ternary Zr50Cu40Al10bulk metallic glass. A spalling process was studied through post-mortem analyses conducted on a recovered sample and spall. Scanning electron microscopy magnification of fract…
View article: Silica Glass Structural Properties under Elastic Shock Compression: Experiments and Molecular Simulations
Silica Glass Structural Properties under Elastic Shock Compression: Experiments and Molecular Simulations Open
The behavior of silica glass material under shock compression has been investigated in this work. Laser-driven experiments and molecular dynamics simulations were combined to study the elastic regime of fused silica up to 8 GPa. Two simple…