Experiments on radiative collapse in laser-produced plasmas relevant to astrophysical jets

Shigemori, K.; Kodama, R.; Farley, D. R.; Koase, T.; Estabrook, K. G.; Remington, B. A.; Ryutov, D. D.; Ochi, Yoshihiro; Azechi, H.; Stone, James M.; Turner, Neal J.

doi:10.1103/physreve.62.8838

Cited by 105 publications

(58 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of scaling relations between the laboratory experiments and astrophysical environments (particularly stellar jets, i.e., YSOs and PNs) implies that these studies can be used to evaluate questions concerning the nature and evolution of collimated plasma Ñows in space. The experiments detailed in this study both complement and extend previous work in this area (e.g., Farely et al 1999 ;Shigemori et al 2000 ;Stone et al 2000) but provide an entirely di †erent route to creating radiative scalable plasma jets (Z-pinch vs. intense lasers). The larger size of the jets created in the Z-pinch systems (scales of centimeters vs. hundreds of microns) also facilitates imaging of the resultant plasma structures.…”

Section: Conclusion and Astrophysical Implicationssupporting

confidence: 66%

“…High Mach number jets have also been the subject of these studies (Logory, Miller, & Story 2000 ;Raga et al 2001). Recent work (Farely et al 1999 ;Shigemori et al 2000 ;Stone et al 2000) using high-power lasers have produced radiative Ñows whose scalings appear to allow contact with astrophysical parameter regimes, including radiative jets.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets

Lebedev

Chittenden

Beg

et al. 2002

ApJ

191

112

View full text Add to dashboard Cite

We present the Ðrst results of astrophysically relevant experiments where highly supersonic plasma jets are generated via conically convergent Ñows. The convergent Ñows are created by electrodynamic acceleration of plasma in a conical array of Ðne metallic wires (a modiÐcation of the wire array Z-pinch). Stagnation of plasma Ñow on the axis of symmetry forms a standing conical shock e †ectively collimating the Ñow in the axial direction. This scenario is essentially similar to that discussed by and colCanto laborators as a purely hydrodynamic mechanism for jet formation in astrophysical systems. Experiments using di †erent materials (Al, Fe, and W) show that a highly supersonic (M D 20), well-collimated jet is generated when the radiative cooling rate of the plasma is signiÐcant. We discuss scaling issues for the experiments and their potential use for numerical code veriÐcation. The experiments also may allow direct exploration of astrophysically relevant issues such as collimation, stability, and jet-cloud interactions.

show abstract

Section: Conclusion and Astrophysical Implicationssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets

Lebedev

Chittenden

Beg

et al. 2002

ApJ

191

112

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Experiments on radiative collapse in laser-produced plasmas relevant to astrophysical jets

Cited by 105 publications

References 18 publications

Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets

Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets

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

Supersonic jet and shock interactions

Contact Info

Product

Resources

About