Numerical Simulations of Magnetized Astrophysical Jets and Comparison with Laboratory Laser Experiments

Belyaev, V. S.; Бисноватый-Коган, Г. С.; Громов, А. И.; Zagreev, B.; Lobanov, A. P.; Матафонов, А. П.; Moiseenko, S. G.; Toropina, O. D.

doi:10.1134/s1063772918030034

Cited by 27 publications

(12 citation statements)

References 36 publications

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“…As a result of scaling, we get a satisfactory similarity of a number of jets parameters expiring from the young stars and the jet obtained on the NEODIM laser installation. In more detailed this method is described in our recent paper [7].…”

Section: Laboratory Jetmentioning

confidence: 99%

“…We investigated the region and shape of the flow at various distances from the target and at different times, the spatial distribution of plasma density and energy and the magnetic field. A scheme of the simulation region can be found in our paper [7].…”

Section: Numerical Modelmentioning

confidence: 99%

“…As the characteristic velocity V 0 the Alfven velocity of the inflowing matter is taken at the boundary of the calculated region V A0 . Boundary and initial conditions are described in our recent paper [7] PoS(HEPRO VII)083 At this step of the simulation we included an external constant poloidal magnetic field H directed along the normal to the target . We performed a series of calculations for different values of the parameter β .…”

Section: The System Of Equationsmentioning

confidence: 99%

See 2 more Smart Citations

MHD Simulation Of Laboratory Jets

Toropina¹,

Бисноватый-Коган²,

Moiseenko³

2020

Proceedings of High Energy Phenomena in Relativistic Outflows VII — PoS(HEPRO VII)

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We present the results of numerical simulations of the formation and development of magnetized jets. We simulate a plasma flow, for which we chose a numerical method, boundary and initial conditions. We investigate the picture of the flow for different magnetic field configurations. We compared these results with the experiment on a NEODIM laser installation. In the absence of a magnetic field, a substantial expansion of the jet occurs. In the presence of a strong poloidal magnetic field, the jet expands only slightly, which confirms the possibility of a magnetic collimation mechanism for astrophysical jets. Under certain values of the magnetic field a ring structure may form. The opening angle of these simulated structures approximates the results of the laboratory experiment.

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Section: Laboratory Jetmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: The System Of Equationsmentioning

confidence: 99%

See 1 more Smart Citation

MHD Simulation Of Laboratory Jets

Toropina¹,

Бисноватый-Коган²,

Moiseenko³

2020

Proceedings of High Energy Phenomena in Relativistic Outflows VII — PoS(HEPRO VII)

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“…As a rule, in such experiments, the dynamics of matter is studied on scales of about several centimeters, and the generation of plasma formations usually occurs under conditions close to vacuum. Similar experiments are carried out both on plasma facilities [3,4] and on laser ones [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

The Collimated Propagation Causes of Astrophysical and Laboratory Jets

et al. 2021

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The use of Z-pinch facilities makes it possible to carry out well-controlled and diagnosable laboratory experiments to study laboratory jets with scaling parameters close to those of the jets from young stars. This makes it possible to observe processes that are inaccessible to astronomical observations. Such experiments are carried out at the PF-3 facility (“plasma focus,” Kurchatov Institute), in which the emitted plasma emission propagates along the drift chamber through the environment at a distance of one meter. The paper presents the results of experiments with helium, in which a successive release of two ejections was observed. An analysis of these results suggests that after the passage of the first supersonic ejection, a region with a low concentration is formed behind it, the so-called vacuum trace, due to which the subsequent ejection practically does not experience environmental resistance and propagates being collimated. The numerical modeling of the propagation of two ejections presented in the paper confirms this point of view. Using scaling laws and appropriate numerical simulations of astrophysical ejections, it is shown that this effect can also be significant for the jets of young stars.

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“…Recently, similar studies have been also started in Russia (Belyaev et al . 2018). An extensive experimental program for laboratory modelling of jets from young stellar objects has been carried out at the planar magnetized coaxial gun facilities at the California Institute of Technology (Bellan 2018) and at the University of Washington (Lavine & You 2019).…”

Section: Introductionmentioning

confidence: 99%

Properties of toroidal magnetic fields in axial plasma flow on the PF-1000U plasma focus facility

et al. 2020

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This paper presents the results of studies of plasma flow parameters on the PF-1000U facility. A distinctive feature of this facility is the ability to create profiled initial gas distributions using gas puffs. In the experiments described, a combined system for filling the vacuum chamber with a working gas was used, in which an additional injection of various gases (deuterium, helium, neon and their mixtures) into the axial region of the chamber prefilled with deuterium was performed using a pulse valve. Thus, both the pinching processes and, accordingly, the generation of axial plasma flows and the conditions of their propagation in the background gas of the facility chamber were affected. Regimes with the generation of compact stable plasma formations propagating over long distances were found. The results obtained can be used in laboratory modelling of astrophysical jets from young stellar objects.

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Numerical Simulations of Magnetized Astrophysical Jets and Comparison with Laboratory Laser Experiments

Cited by 27 publications

References 36 publications

MHD Simulation Of Laboratory Jets

MHD Simulation Of Laboratory Jets

The Collimated Propagation Causes of Astrophysical and Laboratory Jets

Properties of toroidal magnetic fields in axial plasma flow on the PF-1000U plasma focus facility

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