Radiative Jet Experiments of Astrophysical Interest Using Intense Lasers

Farley, D. R.; Estabrook, K. G.; Glendinning, S. G.; Glenzer, S. H.; Remington, B. A.; Shigemori, K.; Stone, James M.; Wallace, R. J.; Zimmerman, G. B.; Harte, J. A.

doi:10.1103/physrevlett.83.1982

Cited by 160 publications

(83 citation statements)

References 11 publications

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“…These include hydrodynamic jet experiments, in both adiabatic [10][11][12][13][14] and radiatively cooled [15][16][17][18] regimes, and experiments relevant to the study of the interaction of protostellar jets with an ambient medium [19][20][21] far away from the jet source.…”

Section: Introductionmentioning

confidence: 99%

Generation of episodic magnetically driven plasma jets in a radial foil Z-pinch

et al. 2010

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We present experimental results of the formation of magnetically driven plasma jets, showing for the first time a way of producing episodic jet/ouflows in the laboratory. The jets are produced using a 6.5 µm thick aluminum disc (a radial foil), which is subjected to the 1 MA, 250 ns current pulse from the MAGPIE generator [I. H. Mitchell et al., Rev. Sci. Instrum. 67, 1533(1996]. The early time motion of the foil is characterized by the bulk motion of the mass due to the magnetic pressure, together with the formation of a surface plasma following the direction of the J × B force. A low density plasma fills the region above the foil preceding the formation of subsequent magnetically driven jets on the axis of expanding magnetic bubbles. The outflows emerge in timescales of ∼30-40 ns and their episodic nature is the result of current reconnection in the foil, aided by the formation of current-driven instabilities in the jet and the distribution of mass available from the foil. The additional inductance due to the new current path inside the cavities was measured using an inductive probe, allowing to estimate the energy balance associated with the episodes. The measured temperature of the compressed jet resulted in Te∼300 eV and a magnetic Reynolds number of ReM ∼200-1000, allowing the experiments to be in the regime relevant for scaled representations of astrophysical outflows.

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Section: Introductionmentioning

confidence: 99%

Generation of episodic magnetically driven plasma jets in a radial foil Z-pinch

et al. 2010

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“…The availability of high-power lasers, such as Omega, now provides a means of studying supersonic fluid flow and shock interactions under conditions formerly unavailable in the laboratory, and of experimentally testing the numerical algorithms implemented in different radiation hydrocodes. Thus, laser drive has been used to investigate the radiative collapse of high Mach-number jets, 15,16 although so far only under conditions where the jet density exceeds that of the ambient medium by many orders of magnitude. The general problem of scaling from these and other laboratory experiments to the astrophysical context has been studied in detail by Ryutov and co-workers.…”

Section: Introductionmentioning

confidence: 99%

Supersonic jet and shock interactions

et al. 2002

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Supersonic fluid flow and the interaction of strong shock waves to produce jets of material are ubiquitous features of inertial confinement fusion ͑ICF͒, astrophysics, and other fields of high energy-density science. The availability of large laser systems provides an opportunity to investigate such hydrodynamic systems in the laboratory, and to test their modeling by radiation hydrocodes. We describe experiments to investigate the propagation of a structured shock front within a radiation-driven target assembly, the formation of a supersonic jet of material, and the subsequent interaction of this jet with an ambient medium in which a second, ablatively driven shock wave is propagating. The density distribution within the jet, the Kelvin-Helmholz roll-up at the tip of the jet, and the jet's interaction with the counterpropagating shock are investigated by x-ray backlighting. The experiments were designed and modeled using radiation hydrocodes developed by Los Alamos National Laboratory, AWE, and Lawrence Livermore National Laboratory. The same hydrocodes are being used to model a large number of other ICF and high energy-density physics experiments. Excellent agreement between the different simulations and the experimental data is obtained, but only when the full geometry of the experiment, including both laser-heated hohlraum targets ͑driving the jet and counter-propagating shock͒, is included. The experiments were carried out at the University of Rochester's Omega laser ͓J. M. Soures et al., Phys. Plasmas 3, 2108 ͑1996͔͒.

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“…In early work lasers were used to irradiate conically shaped targets (Farley et al 1999). Work using wire arrays (Lebedev et al 2002) created stagnation of plasma flow on the axis of symmetry, forming a standing conical shock effectively collimating the flow in the axial direction.…”

Section: Plasma Physicsmentioning

confidence: 99%

The impact of recent advances in laboratory astrophysics on our understanding of the cosmos

et al. 2012

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Abstract. An emerging theme in modern astrophysics is the connection between astronomical observations and the underlying physical phenomena that drive our cosmos. Both the mechanisms responsible for the observed astrophysical phenomena and the tools used to probe such phenomena -the radiation and particle spectra we observe -have their roots in atomic, molecular, condensed matter, plasma, nuclear and particle physics. Chemistry is implicitly included in both molecular and condensed matter physics. This connection is the theme of the present report, which provides a broad, though non-exhaustive, overview of progress in our understanding of the cosmos resulting from recent theoretical and experimental advances in what is commonly called laboratory astrophysics. This work, carried out by a diverse community of laboratory astrophysicists, is increasingly important as astrophysics transitions into an era of precise measurement and high fidelity modeling.

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Radiative Jet Experiments of Astrophysical Interest Using Intense Lasers

Cited by 160 publications

References 11 publications

Generation of episodic magnetically driven plasma jets in a radial foil Z-pinch

Generation of episodic magnetically driven plasma jets in a radial foil Z-pinch

Supersonic jet and shock interactions

The impact of recent advances in laboratory astrophysics on our understanding of the cosmos

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