Directed Drift Fluxes and Electric Domains in Plasma

Oreshko, A. G.

doi:10.1134/s0018151x19060129

Cited by 4 publications

(9 citation statements)

References 13 publications

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“…The process of formation of an electric domain in a plasma is equivalent to the process of transformation of an element with the ohmic component of impedance dominating at the beginning of the process into an element with a capacitive component dominating at the end of the process in some "plasma tube with current" [27]. The displacement of a group of charged particles of one type relative to a group of charged particles of another type in a very short time leads to the appearance of an induced electric field d d ind E t and generates a transverse electromagnetic wave.…”

Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

“…During domain generation, the conduction current drops to zero in the charge separation zone and the bias current increases. The second term in Equation (1) in the first approximation is equal to the difference of directional drift fluxes of ions and electrons [27] (…”

Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

“…which appear at the separation of charges in plasma and pass into light waves in the absence of plasma for which ω = kc. The difference between expression (5) obtained in [15] and the expression given in [27] is in taking into account the conductivity of the plasma, which characterizes the continuity of the medium. Note that the original system of equations in [15] took into account the separation of charges under the action of electric and magnetic fields, while in [28] only the effect of the plasma density gradient was taken into account.…”

Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

See 2 more Smart Citations

Electromagnetic-Wave Mechanism of Formation and Propagation of Astrophysical Vortex Jets Generated in the Jumper of a Spiral Galaxy

Oreshko¹

2023

JHEPGC

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An explanation of the mechanism of generation and acceleration of jets in outer space is given on the basis of experiments in the physics of electrical discharge. The presence of two arms in the spiral Galaxy gives grounds to assume that they have excess charges of the opposite sign. At the moment when the electric field strength between the tips of the arms becomes sufficient, an electrical breakdown occurs, which is accompanied by the movement of the current-plasma leader in the jumper between the tips of the arms. In the head part of the leader there is a flat electric domain of a strong field, which, during its inception, emits intense transverse electromagnetic waves in a direction perpendicular to the direction of the leader's motion and to the plane of the accretion disk. The electric domain periodically appears and collapses due to the entry of neutral particles. Transverse electromagnetic waves capture charged particles from the discharge region and accelerate them in the direction of wave propagation. The crossed fields of an electromagnetic wave perform the functions of a multistage accelerator. The acceleration of the particles of the plasma produced in the discharge to relativistic energy values in the region of narrow vortex jets occurs under the action of forces caused by the components of the electromagnetic wave fields and the pressure gradient. The charged particles of a vortex jet acquire a significant rotational moment under the action of the Lorentz force. Explanations of the generation of microwave, bremsstrahlung and optical radiation from the region of the jumper between the arms of the Galaxy in the absence of electrical breakdown are also given.

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Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

Section: Theoretical Justification Of the Experimental Results And Mo...mentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic-Wave Mechanism of Formation and Propagation of Astrophysical Vortex Jets Generated in the Jumper of a Spiral Galaxy

Oreshko¹

2023

JHEPGC

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“…This instability is called a domain instability and it is caused by the appearance in the plasma of electric domains with a strong field. The domain instability was first discovered in semiconductor solid-state plasma by Nobel laureate Gunn (1963) and is responsible for the abnormal plasma transfer to the chamber walls of experimental facilities (Oreshko 2012a(Oreshko , 2019. Hereinafter, an electric domain should be understood as a quasi-neutral system in total, which consists of a region (layer) with an excess negative charge and a region (layer) with an excess positive charge.…”

Section: Lifetime Of Objects Consisting Of Charged Particles In Naturementioning

confidence: 99%

“…The destruction of the electric domain in the leader's head can be explained only by the fact that during the movement, the space charge is periodically neutralized owing to the entry of neutral particles into its region. The mechanism of electric breakdown in discharges based on an electric domain with a strong field was developed on the basis of a number of experimental results obtained by the author and has a theoretical justification (Oreshko 2001(Oreshko , 2003(Oreshko , 2004(Oreshko , 2006(Oreshko , 2010(Oreshko , 2019. The stepped character and branching of linear lightning, i.e.…”

Section: Relativistic Ball Lightning Generated In Electrical Dischargementioning

confidence: 99%

On physical investigation of ball lightnings

Oreshko

2021

J. Plasma Phys.

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Explanations for the long lifetime of spherically symmetric objects in nature and the short lifetime of laboratory plasma are given. A qualitative description of the relativistic model of ball lightning is also given, which is a spherical electric region with strong electric and magnetic fields. The plasma temperature in the zone of the ball-lightning generation is measured by the spectroscopic method. A large ball lightning, the maximum diameter of which is equal to one meter and which stands in the region of its generation, is also registered after the formation and departure of a high-energy ball lightning. The reason for the low emissive power in the optical range characteristic for the atmospheric ball lightning is explained by the absence of electron transitions in the outer proton-containing shell. The absence of electrical breakdown at ultrahigh electric field between the core and the outer shell of the ball lightning and its destruction at the moment when the resulting force becomes nonzero are also explained.

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On the mechanism of anomalous phenomena in current-carrying magnetized plasma

Oreshko

2023

J. Plasma Phys.

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The explanation of the mechanisms of anomalous resistance and diffusion of plasma, as well as the generation of fast particles, is given from a unified position on the basis of experimental results obtained in plasma in a magnetically isolated diode of an electron accelerator with a microsecond pulse duration. It is shown that oscillations of the potential and current in plasma with current occur by charge separation and the formation of electric domains with a strong field. Electric domains are generated by means of runaway electrons resulting from the redistribution of the current density and its channelling in the current-carrying plasma. An increase in plasma resistance occurs due to a decrease in the number of electrons in the current-conducting state, since some of the plasma electrons pass into layers of excess negative charge of electric domains. The speed of movement of electrons in the composition of the electric domain is much lower than the velocity of electrons in the conducting state. The nucleation of domains is accompanied by microwave emission. Quasi-neutrals in whole electrical domains are injected into the region of the anode wall. The destruction of domains leads to the appearance of plasma channels between the anode and cathode plasma. The transverse electromagnetic waves generated during the nucleation of domains capture charged particles and inject them in a direction that is perpendicular to the insulating longitudinal magnetic field. Plasma turbulence occurs due to charge separation and the generation of electrical domains that create channels between the plasma and the chamber wall, as well as generating fluxes of fast particles.

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Directed Drift Fluxes and Electric Domains in Plasma

Cited by 4 publications

References 13 publications

Electromagnetic-Wave Mechanism of Formation and Propagation of Astrophysical Vortex Jets Generated in the Jumper of a Spiral Galaxy

Electromagnetic-Wave Mechanism of Formation and Propagation of Astrophysical Vortex Jets Generated in the Jumper of a Spiral Galaxy

On physical investigation of ball lightnings

On the mechanism of anomalous phenomena in current-carrying magnetized plasma

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