Observation of collapsing radiative shocks in laboratory experiments

Reighard, A. B.; Drake, R. P.; Dannenberg, K. K.; Kremer, Daniel; Grosskopf, M.J.; Harding, Eric; Leibrandt, David R.; Glendinning, S. G.; Perry, T. S.; Remington, B. A.; Greenough, Jeffrey A.; Knauer, J.P.; Boehly, T. R.; Bouquet, S.; Boireau, L.; Kœnig, M.; Vinci, T.

doi:10.1063/1.2222294

Cited by 91 publications

(57 citation statements)

References 26 publications

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“…The analytical and the numerical findings in our investigation are in good correspondence with those obtained theoretically by others (Mamun 1999;Shukla and Mamun 2003;Lakhina et al 2008). In addition, our results also go in good conformity with the laboratory-based experimental observations in different plasma situations existing in the literature (Luo et al 1999;Reighard et al 2006;Sheridan et al 2008;Bandyopadhyay et al 2008;Merlino et al 2012).…”

Section: Resultssupporting

confidence: 91%

“…The excitations of these nonlinear eigenmodes have also been seen experimentally (Luo et al 1999;Reighard et al 2006;Sheridan et al 2008;Bandyopadhyay et al 2008;Merlino et al 2012), and by satellite (like Viking, FAST, Freja, Polar, Cluster spacecraft, etc.) observations (Gosling et al 1968;Ergun et al 1998a;Ergun et al 1998b;Franz et al 1998;Lee et al 2009;Pickett et al 2003;Carley et al 2013) in presence of the dust grains.…”

Section: Introductionmentioning

confidence: 68%

“…observations (Gosling et al 1968;Ergun et al 1998a;Ergun et al 1998b;Franz et al 1998;Lee et al 2009;Pickett et al 2003;Carley et al 2013) in presence of the dust grains. Lue et al have studied experimentally the formation of the nonlinear shock structures in dusty plasma (Lue et al 1999), whereas, Reighard et al have also observed like structures in different experimental conditions (Reighard et al 2006). Bandyopadhyay et al have experimentally studied the excitation and propagation of the solitary waves in Argon plasma with Kaolin dust grains (Bandyopadhyay et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear gravito-electrostatic waves in self-gravitating complex plasma in presence of ion-drag effects

Haloi

Karmakar

2015

Astrophys Space Sci

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We present theoretical model analysis to study fully nonlinear behavior of gravito-electrostatic fluctuations in unmagnetized self-gravitating collisional dust cloud in presence of the ion-drag forces methodologically on the Jeans scales of space and time. The ion-drag effect as a result of streaming plasma ions arises here due to the ion orbital motion (scattering effect by dust) and the ion momentum transfer (capturing effect by dust) processes in opposite phase with the electrostatic force field. All the realistic astrophysical processes, such as electron impact-ionization of the neutral atoms, volume recombination, attachment of the electrons and ions to the dust grains and the collective plasma particle collisions are jointly considered. The Sagdeev pseudo-potential formulation is methodologically carried out in modified form to derive a new pair of gravitoelectrostatically coupled energy integral equations. A numerical analysis is made to see the fluctuation features in judicious plasma parameter window. It is shown that the fluctuation dynamics evolves as self-gravitational rarefactive solitary structures and electrostatic compressive shocklike spectral patterns. The new features brought about by the considered ion-drag effects are discussed in the light of the existing theoretical, experimental and satellite-based predictions. The relevance of our results to understand the dynamics of self-gravitational collapse leading to galactic structure formation in interstellar space is briefly summarized.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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Nonlinear gravito-electrostatic waves in self-gravitating complex plasma in presence of ion-drag effects

Haloi

Karmakar

2015

Astrophys Space Sci

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“…The study of radiative shocks on Earth thus require different gases and physical conditions, which can be recreated by high energy installations such as laser or pulsed electric installations (Remington et al 2006). Radiative shock experiments have been performed with high power lasers (Bozier et al 1986(Bozier et al , 2000Keiter et al 2002;Reighard et al 2006;Bouquet et al 2004;González et al 2006b;Busquet et al 2006Busquet et al , 2007. Typically, a 200 J laser in about 1 ns can launch a shock at about 60 km s −1 in targets of millimeter size (Bouquet et al 2004) filled with xenon at pressures of some fractions of bars, whereas supercritical shocks at 100 km s −1 in SiO 2 aerogel, argon, and xenon have been produced at the OMEGA laser (5 kJ).…”

Section: Introductionmentioning

confidence: 99%

2D numerical study of the radiation influence on shock structure relevant to laboratory astrophysics

González

Audit

Stehlé

2009

A&A

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Context. Radiative shocks are found in various astrophysical objects and particularly at different stages of stellar evolution. Studying radiative shocks, their topology, and thermodynamical properties is therefore a starting point to understanding their physical properties. This study has become possible with the development of large laser facilities, which has provided fresh impulse to laboratory astrophysics. Aims. We present the main characteristics of radiative shocks modeled using cylindrical simulations. We focus our discussion on the importance of multi-dimensional radiative-transfer effects on the shock topology and dynamics. Methods. We present results obtained with our code HERACLES for conditions corresponding to experiments already performed on laser installations. The multi-dimensional hydrodynamic code HERACLES is specially adapted to laboratory astrophysics experiments and to astrophysical situations where radiation and hydrodynamics are coupled. Results. The importance of the ratio of the photon mean free path to the transverse extension of the shock is emphasized. We present how it is possible to achieve the stationary limit of these shocks in the laboratory and analyze the angular distribution of the radiative flux that may emerge from the walls of the shock tube. Conclusions. Implications of these studies for stellar accretion shocks are presented.

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“…Shocks with M > M cr are called supercritical. Since the last decade, several experiments have been performed to simulate radiative hydrodynamic flows of astrophysical interest like jets or blast waves [16] and radiative shocks [2,17,18]. However, the lack of various measurements on the same shot could not lead to characterize the radiative shock in a consistent way.…”

Section: Radiative Shockmentioning

confidence: 99%

Recent Laboratory Astrophysics Experiments at LULI

Kœnig

Michaut

Loupias

et al. 2009

Plasma and Fusion Research

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At the LULI laboratory we developed since a few years a program on several topics related to laboratory astrophysics: high velocity jets, shock waves in density gradients, collisionless shocks, and radiative shocks (RS). In this paper, the latest experiments related to RS's obtained on the new LULI2000 facility and on GEKKOXII are presented. In particular a strong radiative precursor was observed and its time evolution compared with 2D radiative simulations. The second topic developed at LULI is related to plasma jets which are often observed in Young Stellar Objects (YSO), during their phase of bulk contraction. They interact with the interstellar medium resulting in emission lobes, including the so-called bow shocks. The objective of our experiments was to generate plasma jets propagating through an ambient medium. To this aim, we developed a new target design (a foam filled cone ended with a "nozzle") in order to generate a plasma jet. A jet-like structure was observed and its time evolution studied by varying the foam density. Interaction with ambient medium was recently performed showing growing instabilities for low density gas.

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Observation of collapsing radiative shocks in laboratory experiments

Cited by 91 publications

References 26 publications

Nonlinear gravito-electrostatic waves in self-gravitating complex plasma in presence of ion-drag effects

Nonlinear gravito-electrostatic waves in self-gravitating complex plasma in presence of ion-drag effects

2D numerical study of the radiation influence on shock structure relevant to laboratory astrophysics

Recent Laboratory Astrophysics Experiments at LULI

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