Structure of a laser-driven radiative shock

Chaulagain, Uddhab; Stehlé, C.; Larour, Jean; Kozlová, M.; Suzuki-Vidal, F.; Barroso, P.; Cotelo, Manuel; Velarde, P.; Rodríguez, Rafael; Gil, Juan; Ciardi, A.; Acef, O.; Nejdl, J.; Sá, Lionel de; Singh, Raj Laxmi; Ibgui, L.; Champion, Norbert

doi:10.1016/j.hedp.2015.01.003

Cited by 23 publications

(28 citation statements)

References 43 publications

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“…3(a) where the shock exhibits a stationary velocity. This result for the shock wave velocity shows good agreement with experimental result of 45 km/s [34] using XUV diodes signal to measure the velocity of the piston [36].…”

Section: Shock Velocitysupporting

confidence: 89%

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Simulation of radiative shock waves in Xe of last PALS experiments

Cotelo

Velarde

Varga

et al. 2015

High Energy Density Physics

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Section: Shock Velocitysupporting

confidence: 89%

“…2 that tries to reproduce the geometry and materials of the original target used in PALS experiments [33,34]. The target forms a channel of 7 mm long with a squared section of 0.4 Â 0.4 mm 2 filled with Xe at 0.3 bar.…”

Section: Target Designmentioning

confidence: 99%

Simulation of radiative shock waves in Xe of last PALS experiments

Cotelo

Velarde

Varga

et al. 2015

High Energy Density Physics

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“…By restricting the transverse width of the gas cell, the shocks act as quasi-one dimensional shocks and can interact with 'wall shocks' [15,18]. Many of these experiments focused on studying the radiative precursor [19,20,21,22,23,24,25] while modifications to this experimental configuration have allowed for the study of more complex phenomena, such as the formation of reverse radiative shocks [26] [27] [28] or collisions with obstacles [29,30].…”

Section: Introductionmentioning

confidence: 99%

Counter-propagating radiative shock experiments on the Orion laser and the formation of radiative precursors

Clayson

Suzuki-Vidal

Лебедев

et al. 2017

High Energy Density Physics

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We present results from new experiments to study the dynamics of radiative shocks, reverse shocks and radiative precursors. Laser ablation of a solid piston by the Orion high-power laser at AWE Aldermaston UK was used to drive radiative shocks into a gas cell initially pressurised between 0.1 and 1.0 bar with different noble gases. Shocks propagated at 80 ± 10 km/s and experienced strong radiative cooling resulting in post-shock compressions of ×25 ± 2. A combination of X-ray backlighting, optical self-emission streak imaging and interferometry (multi-frame and streak imaging) were used to simultaneously study both the shock front and the radiative precursor. These experiments present a new configuration to produce counter-propagating radiative shocks, allowing for the study of reverse shocks and providing a unique platform for numerical validation. In addition, the radiative shocks were able to expand freely into a large gas volume without being confined by the walls of the gas cell. This allows for 3-D effects of the shocks to be studied which, in principle, could lead to a more direct comparison to astrophysical phenomena. By maintaining a constant mass density between different gas fills the shocks evolved with similar hydrodynamics but the radiative precursor was found to extend significantly further in higher atomic number gases (∼4 times further in xenon than neon). Finally, 1-D and 2-D radiative-hydrodynamic simulations are presented showing good agreement with the experimental data

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“…This is a further development of previous designs to enable the study of the more complex phenomena and instabilities that can arise in such a system [4] . Since 2000 there have been a number of designs for gas targets used in this field that have either had the features of tubes down which the plasma flow propagates or cells with windows [5][6][7] . The target design was optimized to allow for the shocks to propagate without interacting with the cell walls and for optical and X-ray diagnostics to be able to image the shocks as close as possible to their point of origin.…”

Section: Orion Academic Access Experimentsmentioning

confidence: 99%

Design and fabrication of gas cell targets for laboratory astrophysics experiments on the Orion high-power laser facility

Spindloe

Wyatt

Astbury

et al. 2017

High Pow Laser Sci Eng

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This paper describes the design and fabrication of a range of 'gas cell' microtargets produced by the Target Fabrication Group in the Central Laser Facility (CLF) for academic access experiments on the Orion laser facility at the Atomic Weapons Establishment (AWE). The experiments were carried out by an academic consortium led by Imperial College London. The underlying target methodology was an evolution of a range of targets used for experiments on radiative shocks and involved the fabrication of a precision machined cell containing a number of apertures for interaction foils or diagnostic windows. The interior of the cell was gas-filled before laser irradiation. This paper details the assembly processes, thin film requirements and micro-machining processes needed to produce the targets. Also described is the implementation of a gas-fill system to produce targets that are filled to a pressure of 0.1-1 bar. The paper discusses the challenges that are posed by such a target.

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Structure of a laser-driven radiative shock

Cited by 23 publications

References 43 publications

Simulation of radiative shock waves in Xe of last PALS experiments

Simulation of radiative shock waves in Xe of last PALS experiments

Counter-propagating radiative shock experiments on the Orion laser and the formation of radiative precursors

Design and fabrication of gas cell targets for laboratory astrophysics experiments on the Orion high-power laser facility

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