Collimation of dense plasma jets created by low-energy laser pulses and studied with soft x-ray laser interferometry

Purvis, Michael; Grava, Jonathan; Filevich, Jorge; Ryan, Duncan P.; Moon, Stephen J.; Dunn, James P.; Shlyaptsev, Vyacheslav N.; Rocca, J. J.

doi:10.1103/physreve.81.036408

Cited by 10 publications

(14 citation statements)

References 28 publications

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“…A number of experiments have taken place in recent years to investigate jet propagation. These have demonstrated the propagation of a jet moving into an ambient medium, either stationary (Nicolaï et al 2008;Foster et al 2005;Ampleford et al 2005) or in the form of a plasma crosswind (Lebedev et al 2004), and an increase in jet collimation due to radiative cooling (Shigemori et al 2000;Lebedev et al 2002;Purvis et al 2010). The work presented here is aimed at studying the effects of radiative losses on the collimation of plasma jets.…”

Section: Introductionmentioning

confidence: 99%

Experiments to investigate the effects of radiative cooling on plasma jet collimation

Gregory

Dizière

Aoki

et al. 2014

High Energy Density Physics

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Preliminary experiments have been performed to investigate the effects of radiative cooling on plasma jets. Thin (3 µm -5 µm) conical shells were irradiated with an intense laser, driving jets with velocities > 100 km s −1 . Through the use of different targets materials -aluminium, copper and gold -the degree of radiative losses was altered, and their importance for jet collimation investigated. A number of temporallyresoved optical diagnostics was used, providing information about the jet evolution. Gold jets were seen to be narrower than those from copper targets, while aluminium targets produced the least collimated flows.

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Section: Introductionmentioning

confidence: 99%

Experiments to investigate the effects of radiative cooling on plasma jet collimation

Gregory

Dizière

Aoki

et al. 2014

High Energy Density Physics

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“…They were also motivated by the fact that similar, earlier NOVA experiments produced puzzling results, raising the question whether radiation-hydrodynamics codes might be inadequate to model the experiment and collisionless Particle-In-Cell (PIC) codes might be needed instead(WAN). GRAVA and later work by the same collaboration [31,32] showed that radiation-hydrodynamic codes are able to model this kind of experiment, and for a variety of different target elements.…”

Section: Comparison To Grava Et Al 2008mentioning

confidence: 97%

Code-to-Code Comparison and Validation of the Radiation-Hydrodynamics Capabilities of the FLASH Code Using a Laboratory Astrophysical Jet

Orban¹,

Fatenejad²,

Lamb³

2020

Preprint

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The potential for laser-produced plasmas to yield fundamental insights into high energy density physics (HEDP) and deliver other useful applications can sometimes be frustrated by uncertainties in modeling the properties and behavior of these plasmas using radiation-hydrodynamics codes. In an effort to overcome this and to corroborate the accuracy of the HEDP capabilities that have been added to the publicly available FLASH radiation-hydrodynamics code, we present detailed code-to-code comparisons between FLASH and the HYDRA code developed at Lawrence Livermore National Laboratory using previously published HYDRA simulations from Grava et al. 2008. That study describes a laser experiment that produced a jet-like feature that the authors compare to astrophysical jets. Importantly, the Grava et al. 2008 experiment included detailed x-ray interferometric measurements of electron number densities. Despite radically different methods for treating the computational mesh, and different equation of state and opacity models, the FLASH results greatly resemble the results from HYDRA and, most importantly, the experimental measurements of electron density. Having validated the FLASH code in this way, we use the code to further investigate and understand the formation of the jet seen in the Grava et al. (2008) experiment and discuss its relation to the Wan et al. (1997) experiment at the NOVA laser.

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“…The HYDRA calculations were performed assuming Local Thermodynamic Equilibrium 5 and utilized the temporal measurements of the laser profile, the measured beam diameter, and the laser energy on the target to simulate the energy deposition into the target over time. HYDRA calculations were performed for two specific laser experiments corresponding to 10 14 and 10 16 Wcm -2 intensities.…”

Section: Simulationmentioning

confidence: 99%

Time-resolved soft x-ray spectra from laser-produced Cu plasma

Cone¹,

Baldis²,

Dunn³

et al. 2012

Review of Scientific Instruments

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The volumetric heating of a thin copper target has been studied with time resolved x-ray spectroscopy. The copper target was heated by a plasma produced using the Lawrence Livermore National Laboratory's Compact Multipulse Terawatt (COMET) laser. A variable spaced grating spectrometer coupled to an x-ray streak camera measured soft x-ray emission (800–1550 eV) from the back of the copper target to characterize the bulk heating of the target. Radiation hydrodynamic simulations were modeled in two-dimensions using the HYDRA code. The target conditions calculated by HYDRA were post-processed with the atomic kinetics code CRETIN to generate synthetic emission spectra. A comparison between the experimental and simulated spectra indicates the presence of specific ionization states of copper and the corresponding electron temperatures and ion densities throughout the laser-heated copper target.

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Collimation of dense plasma jets created by low-energy laser pulses and studied with soft x-ray laser interferometry

Cited by 10 publications

References 28 publications

Experiments to investigate the effects of radiative cooling on plasma jet collimation

Experiments to investigate the effects of radiative cooling on plasma jet collimation

Code-to-Code Comparison and Validation of the Radiation-Hydrodynamics Capabilities of the FLASH Code Using a Laboratory Astrophysical Jet

Time-resolved soft x-ray spectra from laser-produced Cu plasma

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