Numerical Simulation of the Interaction of High-Velocity Plasma Jets Injected in the Earth's Ionosphere

Article Physics, Fluids & Plasmas

Particle-in-cell modeling of plasma jet merging in the large-Hall-parameter regime

H. Wen et al.

Summary: In this study, the merging process of magnetized plasma jets was modeled using fully kinetic particle-in-cell simulations. The modified two-stream instability was identified as the main mechanism responsible for stopping the plasma jets and preventing species interpenetration. The results showed that the merged plasma had electron and ion Hall parameters greater than unity and a plasma beta close to unity, which are desired characteristics for PLX experiments. Additionally, the 2D simulations validated the results of the radiation magneto-hydrodynamics code FLASH, which will be used for modeling future PJMIF experiments.

PHYSICS OF PLASMAS (2022)

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Article Physics, Fluids & Plasmas

Numerical Simulations of the First Stage of Dynamics of a High-Speed Plasma Jet in Fluxus and North Star Active Geophysical Rocket Experiments

T. Losseva et al.

Summary: Time-dependent gasdynamic parameters of high-speed aluminum plasma jets injected into the ionosphere were obtained through numerical simulations, which agree with measurement data of gasdynamic and radiation characteristics of the plasma in laboratory and ionospheric experiments.

PLASMA PHYSICS REPORTS (2022)

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Article Physics, Fluids & Plasmas

Laboratory Simulation of the Structure of Jets from Young Stars

V. Krauz et al.

Summary: The laboratory simulation of jets from young stars was conducted to investigate the spatial structure of plasma jets in different gases. The results show that pure neon gas produces the most structured plasma flow, while pure helium gas shows the least structured flow. However, adding a small amount of neon to helium significantly alters the shape of the plasma ejection head and introduces noticeable small-scale structures. It is suggested that these differences are related to the cooling efficiency and the presence of instabilities in the plasma. In addition, multiple blobs propagating parallel to each other can be observed in some cases, leading to the formation of a lace-like structure in the plasma ejection.

PLASMA PHYSICS REPORTS (2022)

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Article Astronomy & Astrophysics

On the Modeling of Type IIP Supernovae in the Gray-Opacity Approximation and Properties of Their Light Curves

E. M. Urvachev et al.

Summary: The study compared the results of different hydrodynamic approaches in computing a simplified one-dimensional model of a type II supernova during the free expansion stage, showing good agreement in profiles of physical quantities and light curves. Additionally, it demonstrated that the light curve of such type II supernova in the UX band exhibits a characteristic double-peaked structure.

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS (2022)

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Article Physics, Fluids & Plasmas

Investigation of X-Ray Self-Emission of Plasma of Targets Heated by High-Power Pulses of Soft X-Ray Radiation

V. V. Aleksandrov et al.

Summary: Experiments were conducted to investigate the X-ray self-emission of plasma in heated targets composed of layers of different materials. The study found that materials with high atomic number Z contribute significantly to the self-emission of the target.

PLASMA PHYSICS REPORTS (2021)

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Proceedings Paper Meteorology & Atmospheric Sciences

Determination of the high-speed plasma jet injection parameters in the Fluxus experiments

T. Losseva et al.

Summary: This work discusses the determination of radiation-gas-dynamic parameters of a high-speed aluminum plasma jet injected into the ionosphere using the explosive cumulative generator VGPS-300. The algorithm for calculating these parameters is described, and the numerical simulation results for the initial stage of the jet plasma dynamics are consistent with evidence from laboratory experiments and ionospheric experiments Fluxus.

27TH INTERNATIONAL SYMPOSIUM ON ATMOSPHERIC AND OCEAN OPTICS, ATMOSPHERIC PHYSICS (2021)

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Article Multidisciplinary Sciences