Evaluation of the Electric Field Strength in a Pre-Breakdown Ionization Wave in a Long Discharge Tube from the Emission Spectrum

Dyatko, N. A.; Ionikh, Yu. Z.; Kalinin, Stanislav; Mityureva, A. A.

doi:10.1134/s1063780x20020026

Cited by 9 publications

(14 citation statements)

References 41 publications

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“…At the middle stage, the velocity is higher (approximately 3.5 × 10 5 m s −1 ). A similar velocity is also obtained in other experiments [28,44] and simulations [41,43]. The length of the ionization wave rapidly rises at first and increases more slowly at the end of the first stage.…”

Section: Mechanisms Of the Two-spike-currentsupporting

confidence: 88%

“…In our previous study, it is deduced by a theoretical derivation that the first current spike is due to discharge propagation in the form of ionization wave at a certain distance from the HV electrode, while the second current spike is caused by the repeated re-ignition of the SDBD on the area covered before by the ionization wave [21]. The evolution of electron density in section 4.2 has proved this deduction, and the first discharge channel is the natural ionization wave [44]. Although the ionization wave has been observed in the experiment by Huang et al in ns SDBD in Ar [28], it is proved by simulation under a more complicated condition with sophisticated particles and reactions in the air in this paper.…”

Section: Mechanisms Of the Two-spike-currentmentioning

confidence: 82%

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Numerical verification of the two-spike-current behavior in the initial stage of plasma formation in a pulsed surface dielectric barrier discharge

Jiang¹,

Li²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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Nanosecond pulsed surface dielectric barrier discharge (SDBD) is a hot topic in many fields, but the mechanisms of discharge evolution and micro-channel propagation are still not clearly understood. In this paper, a plasma fluid model of nanosecond pulsed SDBD is established, and the deductions of the two current spikes are verified and improved by simulation. The two current spikes correspond to the two stages of the discharge: the ionization wave propagation and the repeated re-ignition in the gap between the ionization wave and the dielectric surface. In the first stage, the ionization wave develops rapidly at first and propagates very slowly in the end, which produces the first current spike with a very short rise time and a tailing falling edge. The curve profile of the ionization wave velocity is very similar to that of the first current spike. A certain distance is maintained between the bottom of the ionization wave and the dielectric surface in this stage, which forms the gap for the next stage. In the second stage, the charged particle cloud induced by the quasi-uniform electric field in the middle of the gap and the new micro-channel from the edge of the high-voltage electrode propagate at first, and then merge together to establish a new discharge channel. The reverse electric field in the gap induced by the accumulated charges on the dielectric surface restricts the expansion velocity of the second discharge channel, which results in a longer rise time and falling time of the second current spike.

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Section: Mechanisms Of the Two-spike-currentsupporting

confidence: 88%

Section: Mechanisms Of the Two-spike-currentmentioning

confidence: 82%

Numerical verification of the two-spike-current behavior in the initial stage of plasma formation in a pulsed surface dielectric barrier discharge

Jiang¹,

Li²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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show abstract

“…The intensity-ratio method was applied also to plasmas in other gas mixtures, also excluding nitrogen, i.e. utilizing different collision-radiative schemes for electric field or electron temperature determination, such as for argon, helium and mixtures [29,[77][78][79][80][81].…”

Section: Oes Methods Based On Collision Radiative Schemesmentioning

confidence: 99%

Electric field determination in transient plasmas: in situ & non-invasive methods

Goldberg

Hoder

Brandenburg

2022

Plasma Sources Sci. Technol.

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One of the primary basic plasma parameters within transient nonequilibrium plasmas is the reduced electric field strength, roughly understood as the ratio of the electrical energy given to the charged species between two collisions. While physical probes have historically been used for electric field measurements, recent advances in high intensity lasers and sensitive detection methods have allowed for non-invasive optical electric field determination in nearly any discharge configuration with time-resolution up to the sub-nanosecond range and sub-millimeter spatial resolution. This topical review serves to highlight several non-invasive methods for in-situ electric field strength determination in transient plasmas ranging from high vacuum environments to atmospheric pressure and above. We will discuss the advantages and proper implementation of (i) Laser induced fluorescence dip spectroscopy for measurements in low pressure RF discharges, (ii) optical emission spectroscopy based methods for nitrogen, helium or hydrogen containing discharges, (iii) electric field induced coherent Raman scattering, and (iv) electric field induced second harmonic generation. The physical mechanism for each method will be described as well as basic implementation and highlighting recent results.

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“…In [112], a model was created that made it possible to apply this approach to the diagnosis of a pre-breakdown IW. With its help, the experimental data presented in Fig.…”

Section: Radiation Spectrum Of An Ionization Wavementioning

confidence: 99%

Electric Breakdown in Long Discharge Tubes at Low Pressure (Review)

Ionikh

2020

Plasma Phys. Rep.

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The review is devoted to studies of the processes and mechanisms of ignition of a glow discharge in tubes whose length significantly exceeds their diameter (long discharge tubes) at low pressures (~10 Torr and lower) and moderate voltage rise rates (~1 kV/μs and lower). The electric field in such tubes before a breakdown is substantially nonuniform. Therefore, a breakdown occurs after an ionization wave (or waves) passes through the discharge gap at a speed of ~105–107 cm/s. This makes the characteristics of the breakdown in long tubes significantly different from the breakdown between large and closely spaced electrodes, where the electric field is uniform before the breakdown and where the Townsend or, under strong overvoltage, streamer mechanism is realized. On the other hand, the nature of these processes is very different from those occurring in nanosecond discharges, which arise at voltages with a steepness of ~1 kV/ns and higher and are associated with high-speed (~109 cm/s) ionization waves. The review is based on the materials of experimental and computational works published from 1938 to 2020. Breakdown processes, optical and electrical characteristics of the discharge gap during breakdown, and the influence of the external circuit parameters and external actions (shielding and illumination by external sources of visible radiation) are analyzed.

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Evaluation of the Electric Field Strength in a Pre-Breakdown Ionization Wave in a Long Discharge Tube from the Emission Spectrum

Cited by 9 publications

References 41 publications

Numerical verification of the two-spike-current behavior in the initial stage of plasma formation in a pulsed surface dielectric barrier discharge

Numerical verification of the two-spike-current behavior in the initial stage of plasma formation in a pulsed surface dielectric barrier discharge

Electric field determination in transient plasmas: in situ & non-invasive methods

Electric Breakdown in Long Discharge Tubes at Low Pressure (Review)

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