Charge–voltage relationship of the first impulse corona in long airgaps

Ortéga, Pascal; Heilbronner, F.; Rühling, F.; Diaz, Ricardo Ruben; Rodiere, M

doi:10.1088/0022-3727/38/13/021

Cited by 18 publications

(9 citation statements)

References 20 publications

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“…It is therefore difficult to establish a direct comparison with empirical estimations of total charge, such as those by Ortega et al [67]. However, our estimation of a few amperes is similar to the peak current reported in [67]. Our simulation would require some hundreds of nanoseconds to reach the thousands of nanocoulombs measured in that experiment.…”

Section: Current and Total Chargesupporting

confidence: 49%

“…the lost of conductivity in the upper channels due to electron attachment, presently not included in our model. It is therefore difficult to establish a direct comparison with empirical estimations of total charge, such as those by Ortega et al [67]. However, our estimation of a few amperes is similar to the peak current reported in [67].…”

Section: Current and Total Chargesupporting

confidence: 47%

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Growing discharge trees with self-consistent charge transport: the collective dynamics of streamers

Luque

Ebert

2014

New J. Phys.

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We introduce the generic structure of a growth model for branched discharge trees that consistently combines a finite channel conductivity with the physical law of charge conservation. It is applicable, e.g., to streamer coronas near tip or wire electrodes and ahead of lightning leaders, to leaders themselves and to the complex breakdown structures of sprite discharges high above thunderclouds. Then we implement and solve the simplest model for positive streamers in ambient air with self-consistent charge transport. We demonstrate that charge conservation contradicts the common assumption of dielectric breakdown models that the electric fields inside all streamers are equal to the so-called stability field and we even find cases of local field inversion. We also find that, counter-intuitively, the inner branches of a positive-streamer tree are negatively charged, which provides a natural explanation for the observed reconnections of streamers in laboratory experiments and in sprites. Our simulations show the structure of an overall 'streamer of streamers' that we name collective streamer front, and predict effective streamer branching angles, the charge structure within streamer trees and streamer reconnection.

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Section: Current and Total Chargesupporting

confidence: 49%

Section: Current and Total Chargesupporting

confidence: 47%

Growing discharge trees with self-consistent charge transport: the collective dynamics of streamers

Luque

Ebert

2014

New J. Phys.

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“…It is obvious that Q i increases with U i . By assuming the structure of the corona area to be conical, 13 according to Gauss's law, the relationship between Q i and U i can be expressed by…”

Section: A Fundamental Processes Of Positive Upward Dischargesmentioning

confidence: 99%

An improved model to determine the inception of positive upward leader–streamer system considering the leader propagation during dark period

Xie

Chen

2013

Physics of Plasmas

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Stem-leader transition and front-streamer inception are two essential conditions for the inception of positive upward leader-streamer system (LSS). Previous models have not considered the initialleader propagation during dark period and have not been verified systematically. In this paper, a series of positive upward discharge simulation experiments was designed and carried out. Characteristic parameters of the discharge process related to the inception of positive upward LSS, namely, the first-corona inception voltage, the first-corona charge, the dark period, and the LSS inception voltage, were obtained. By comparing these experiment results with simulation results calculated using previous models, it was found that it is improper to assume that the length of the initial leader is a fixed value. Finally, an improved inception model of positive upward LSS considering the leader propagation during dark period was developed and verified with experiment results. V C 2013 AIP Publishing LLC. [http://dx.

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“…Renardieres Group, 1981;Ortega et al, 2005]. The corona streamers push electrons from the vicinity of the electrode, and build up a positive space charge which produces a field reduction [e.g., Trichel, 1938;Les Renardieres Group, 1981].…”

Section: Overview Of Long Negative Leadersmentioning

confidence: 99%

Observations and Modeling of Long Negative Laboratory Discharges: Identifying the Physics Important to an Electrical Spark in Air

Biagi¹,

Uman²

2011

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Charge–voltage relationship of the first impulse corona in long airgaps

Cited by 18 publications

References 20 publications

Growing discharge trees with self-consistent charge transport: the collective dynamics of streamers

Growing discharge trees with self-consistent charge transport: the collective dynamics of streamers

An improved model to determine the inception of positive upward leader–streamer system considering the leader propagation during dark period

Observations and Modeling of Long Negative Laboratory Discharges: Identifying the Physics Important to an Electrical Spark in Air

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