Laboratory simulations of astrophysical jets: results from experiments at the PF-3, PF-1000U, and KPF-4 facilities

Krauz, V. I.; Myalton, V. V.; Vinogradov, V. P.; Velikhov, E. P.; Ananyev, S.S.; Dan’ko, S. A.; Kalinin, Yu. G.; Kharrasov, A. M.; Vinogradova, Yu. V.; Mitrofanov, K. N.; Paduch, M.; Miklaszewski, R.; Zielinska, E.; Składnik‐Sadowska, E.; Sadowski, M.; Kwiatkowski, R.; Tomaszewski, K.; Vojtenko, D.A.

doi:10.1088/1742-6596/907/1/012026

Cited by 9 publications

(13 citation statements)

References 7 publications

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“…The transverse dimension of the flow head does not exceed a few cm at propagation distances more than 100 cm (Fig. 4) [13,15]. This implies that there are mechanisms for stabilizing/confining the plasma flow, which was the subject of our further research.…”

Section: Plasma Focusmentioning

confidence: 83%

Laboratory simulation of astrophysical jets within facilities of plasma focus type

Krauz

Бескин

Velikhov

2018

Int. J. Mod. Phys. D

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A laboratory simulation of astrophysical processes is one of the intensively developed areas of plasma physics. A new series of experiments has been launched recently on the Plasma Focus type facility in NRC Kurchatov Institute. The main goal is to study the mechanisms of the jet stabilization, due to which it can propagate at distances much greater than their transverse dimensions. The experiments with stationary gas filling revealed regimes in which a narrowly collimated plasma jet was formed, the head of which was no wider than several centimeters at jet propagation distances of up to 100 cm. The PF-1000 (IFPiLM, Warsaw, Poland) and KPF-4 (SFTI, Sukhum, Abkhazia) experiments are aimed at creating profiled initial gas distributions to control the conditions of plasma jet propagation in the ambient plasma. Estimations of the dimensionless parameters, i.e. the Mach, Reynolds, and Peclet numbers which were achieved during the experiments, showed that the PF-facilities can be used for the YSO jets modelling. The future experiments, which can allow one to understand the nature of the stable plasma ejections observed in many astrophysical sources, are discussed.

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Section: Plasma Focusmentioning

confidence: 83%

Laboratory simulation of astrophysical jets within facilities of plasma focus type

Krauz

Бескин

Velikhov

2018

Int. J. Mod. Phys. D

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“…Indications were also found that current closure occurs on the periphery of the flow itself (Krauz et al 2019). Finally, the morphology of the areas of interaction between the plasma ejections and the working gases filling the chamber was indeed close to the structure of the characteristic regions observed both in non-relativistic (Herbig-Haro objects) and relativistic (so-called radio lobes) astrophysical objects (Beskin et al 2017a;Krauz et al 2017Krauz et al , 2018. Therefore, it seems extremely important to conduct further detailed studies to clarify the role of the external environment and the details of the structure in the areas of interaction with the external environment.…”

Section: Introductionmentioning

confidence: 55%

“…2017 a ; Krauz et al. 2017, 2018). Therefore, it seems extremely important to conduct further detailed studies to clarify the role of the external environment and the details of the structure in the areas of interaction with the external environment.…”

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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“…Here we will present a new complementary approach in the quest of understanding jet collimation based on a numerical simulations of knots propagation confront to experiment in laboratory [14][15][16][17][18][19]. This facility is of the "plasma focus" type (PF), which is one of the modifications of Z-pinches -the so-called "non-cylindrical Zpinch".…”

Section: Introductionmentioning

confidence: 99%

Propagation dynamics of successive emissions in laboratory and astrophysical jets and problem of their collimation

et al. 2018

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This paper presents the results of numerical simulation of the propagation of a sequence of plasma knots in laboratory conditions and in the astrophysical environment. The physical and geometric parameters of the simulation have been chosen close to the parameters of the PF-3 facility (Kurchatov Institute) and the jet of the star RW Aur. We found that the low-density region formed after the first knot propagation plays an important role in the collimation of the subsequent ones. Assuming only the thermal expansion of the subsequent emissions, qualitative estimates of the time taken to fill this area with the surrounding matter and the angle of jet scattering have been made. These estimates are consistent with observations and results of our modeling.

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Laboratory simulations of astrophysical jets: results from experiments at the PF-3, PF-1000U, and KPF-4 facilities

Cited by 9 publications

References 7 publications

Laboratory simulation of astrophysical jets within facilities of plasma focus type

Laboratory simulation of astrophysical jets within facilities of plasma focus type

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

Propagation dynamics of successive emissions in laboratory and astrophysical jets and problem of their collimation

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