VISAR diagnostic at LIL facility

Darbon, S.; Duval, Alain; Masclet-Gobin, I.; Marchet, B.; Brygoo, S.; Courtois, Christian; Debras, G.; Patissou, L.; Parreault, Romain; Lobios, Olivier; Mangeant, M.; Parrot, S.; Hartmann, O.

doi:10.1051/epjconf/20135913001

Cited by 2 publications

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References 4 publications

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“…Finally, a Velocity Interferometer System for Any Reflector (VISAR) [23][24][25][26] located at (90°,90°) was used (only for configuration #1) to study the wall breakout of ablation shocks launched by the radiation front inside the tube. In this configuration, the VISAR laser probe initially reflects on the polished plane of the tube and static interference fringes are obtained on VISAR images.…”

Section: Methodsmentioning

confidence: 99%

Extensive characterization of Marshak waves observed at the LIL laser facility

et al. 2022

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We detail results of an experiment performed at the Ligne d'Intégration Laser facility aimed at studying supersonic and diffusive radiation front propagation in low-density SiO2 aerogel (20 and 40 mg/cm3) enclosed in a gold tube, driven by thermal emission from a laser-heated spherical gold cavity. The evolution of the front is studied continuously by measuring its self-emission with a 1D (one-dimensional) time-resolved soft x-ray imager. Measurement is performed along (through a 200- μm-wide observation slit) and at the exit of the tube giving access to the dynamics and the curvature of the front. Experimental results are then compared successfully to results from the 3D (three-dimensional) radiation hydrodynamics code TROLL, which shows that if continuous tracking of the front position is accessible with this experimental scheme, measurement of its maximum radiation temperature is on the contrary affected by radiation closure of the observation slit. 3D simulations also indicate that this effect can even be worsened if one includes pointing errors of the x-ray imager. Radiation temperature along the tube was then inferred by combining results from the imager to a wall shock breakout time measurement using a velocity interferometer system for any reflector and results from a broadband x-ray spectrometer used to determine the temperature at the exit of the tube. A decrease in the radiation temperature along the tube is observed, the decrease being more important for the higher SiO2 aerogel density.

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Section: Methodsmentioning

confidence: 99%

Extensive characterization of Marshak waves observed at the LIL laser facility

et al. 2022

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Imaging velocity interferometer system for any reflector (VISAR) diagnostics for high energy density sciences

Celliers

Millot

2023

Review of Scientific Instruments

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Two variants of optical imaging velocimetry, specifically the one-dimensional streaked line-imaging and the two-dimensional time-resolved area-imaging versions of the Velocity Interferometer System for Any Reflector (VISAR), have become important diagnostics in high energy density sciences, including inertial confinement fusion and dynamic compression of condensed matter. Here, we give a brief review of the historical development of these techniques, then describe the current implementations at major high energy density (HED) facilities worldwide, including the OMEGA Laser Facility and the National Ignition Facility. We illustrate the versatility and power of these techniques by reviewing diverse applications of imaging VISARs for gas-gun and laser-driven dynamic compression experiments for materials science, shock physics, condensed matter physics, chemical physics, plasma physics, planetary science and astronomy, as well as a broad range of HED experiments and laser-driven inertial confinement fusion research.

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VISAR diagnostic at LIL facility

Cited by 2 publications

References 4 publications

Extensive characterization of Marshak waves observed at the LIL laser facility

Extensive characterization of Marshak waves observed at the LIL laser facility

Imaging velocity interferometer system for any reflector (VISAR) diagnostics for high energy density sciences

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