The discharge current induced by the motion of charged particles in time-dependent electric fields; Sato's equation extended

Morrow, R.; Sato, Noriyosi

doi:10.1088/0022-3727/32/5/005

Cited by 142 publications

(83 citation statements)

References 3 publications

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“…For a discharge between metallic electrodes without dielectric surfaces, the general expression (Eq. 8) can be simplified to obtain the well known Sato's equation for time dependent applied voltages (equation 24 in [22]). In Sato's equa-tion, the Laplacian electric field and its time derivative are used.…”

Section: Model Descriptionmentioning

confidence: 99%

Surface charge deposition inside a capillary glass tube by an atmospheric pressure discharge in air

Jánský

Bourdon

2011

Eur. Phys. J. Appl. Phys.

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To cite this version:J. Jánský, A. Bourdon. Surface charge deposition inside a capillary glass tube by an atmospheric pressure discharge in air. European Physical Journal: Applied Physics, EDP Sciences, 2011, 55 (1) Abstract. This paper presents simulations of the dynamics of surface charging by an air plasma discharge at atmospheric pressure initiated by a needle anode inside a capillary glass tube. During the discharge propagation in the tube, the highest positive surface charge density is observed close to the point electrode.We have shown that during the discharge propagation, the positive surface charge is increasing behind the discharge front, while the electric field at the surface is decreasing. Then, we have studied the influence of the tube radius, its permittivity and the applied pulsed voltage on surface charges. We have shown that the surface charge density during the discharge propagation is inversely proportional to the tube radius and surface charge densities of 30 − 50 nC/cm 2 for a tube with R tube = 100 µm and an applied voltage of 12 kV/cm have been obtained. We have also noted that a higher permittivity results in a higher surface charge density and a faster surface charge deposition. Then we have shown that the surface charge deposited is proportional to the applied voltage. Finally, at the end of the voltage pulse, our simulations indicate that the positive surface charge deposited during the discharge propagation in the tube decreases to very low values in few nanoseconds.

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Section: Model Descriptionmentioning

confidence: 99%

Surface charge deposition inside a capillary glass tube by an atmospheric pressure discharge in air

Jánský

Bourdon

2011

Eur. Phys. J. Appl. Phys.

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“…In a number of experimental works [11,16,17] the attempts to prove the nature of the "step" were made taking into account the secondary photoelectron emission, and binding the pulse peak with the steamer nature. The results obtained in this paper show (figure 2c) that such "dualisms" in the description of these secondary pule elements is connected with an essential simplifying of the corona geometry by Morrow [22] and with the use of the Sato's expression for the current with the undetailed component of the displacement current (recently the authors have made appropriate corrections [41]). The cathode was set artificially like a sphere with the radius of 0.5 cm (too large for the corona), the emission area of which is greater in dozens of thousands of such ones in the papers [11,16,17].…”

Section: Analysis Of the Resultsmentioning

confidence: 63%

Physical Mechanisms of Negative Corona Current Pulse With Secondary Oscillation

Chyhin¹

2002

Condens. Matter Phys.

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The detailed modelling of the negative corona current pulses including the secondary oscillation (SCO) has been realized, using the continuity differential equations for the fluxes of positive and negative ions and electrons, supplemented by the Poisson's equation for an electrical field in a quasione-dimensional space, as the basis for the numerical computation. The analysis of the basic plasma functions behaviour applicable to the pulsing corona in Ar+O 2 and N 2 +O 2 mixtures in the concentration region of O 2 from 2 · 10 −3 % to 0.04% has been carried out and the physical mechanisms of the secondary current oscillation have been grounded for the first time. Moreover, an effect of the photoprocesses on the parameters of the strikingly different pulses in Ar+O 2 and N 2 +O 2 mixtures is estimated for the first time. It has been determined that the SCO is caused by the field intensity oscillation in the antiphase in the surface region and in the end of the sheath. The SCO pulse can transfer into the full modes of the Trichel's pulse. Characteristics of the "precursor" and the "step" in the leading pulse front are determined by the dynamics of the volumetric charges in the sheath, whereas the SCO shape is determined by the variable flow of the positive ions to the cathode. In N 2 +O 2 the ionization of O 2 molecules by the N * 2 emitted photons leads to the adequate current rise. Pulse trailing part duration and current value are operated by the O − 2 ions collisions with the N * 2 metastables. Such processes are slowed in Ar+O 2 .

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“…The swarm parameters in Table I obtained by Kang were utilized in our simulations which were verified by Tran and summarized by Georghiou et al; [32][33][34] i is the Trichel pulse current and V a the applied voltage. 35 Ion-impact secondary emission is the main reason that the negative corona discharge sustains which was proved by Morrow in his previous research. 16 Then the secondary emission coefficient is represented by γ in the range from 0.01 to 0.001 and γ = 0.004 was utilized in this manuscript.…”

Section: B Governing Equationsmentioning

confidence: 85%

The role of photoionization in negative corona discharge

Sun

2016

AIP Advances

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The effect of photoionization on the negative corona discharge was simulated based on the needle to plane air gaps. The Trichel pulse, pulse train, electron density and the distribution of electric field will be discussed in this manuscript. Effect of photoionization on the magnitude and interval of the first pulse will be discussed for different applied voltages. It is demonstrated that the peak of the first pulse current could be weakened by photoionization and a critical voltage of the first pulse interval influenced by photoionization was given.

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The discharge current induced by the motion of charged particles in time-dependent electric fields; Sato's equation extended

Cited by 142 publications

References 3 publications

Surface charge deposition inside a capillary glass tube by an atmospheric pressure discharge in air

Surface charge deposition inside a capillary glass tube by an atmospheric pressure discharge in air

Physical Mechanisms of Negative Corona Current Pulse With Secondary Oscillation

The role of photoionization in negative corona discharge

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