Dynamics of a lightning corona sheath—A constant field approach using the generalized traveling current source return stroke model

Cvetić, Jovan; Heidler, F.; Markovic, Slavoljub; Radosavljevic, R.; Osmokrović, P.

doi:10.1016/j.atmosres.2012.03.012

Cited by 21 publications

(10 citation statements)

References 26 publications

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“…The new corona sheath model developed in this study represents an improved model of the corona sheath described in earlier studies [5], [6], [9]. Corona models in these studies were also in accordance with the experiments of corona discharges in coaxial geometry [10].…”

Section: Introductionsupporting

confidence: 76%

“…In other words, there is a certain excess of positive charge generated during the return stroke which remains in the corona sheath after the channel-base current has ceased to flow. This conclusion was a consequence of an earlier analysis which had showed that the maximum extent of the leader sheath radius was 6 cm ( [9], Table IV therein). Since the electric field sensor was positioned at 10 cm from the channel core, our assumption is that the measurements were performed outside the maximum perimeter of the corona envelope (denoted by 2 R and calculated below).…”

Section: A New Corona Sheath Modelmentioning

confidence: 67%

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Electric field close to lightning channel in the presence of current reflections from the ground

Tausanovic¹,

Ignjatovic²,

Cvetić³

et al. 2016

Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MedPower 2016)

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Appearance of an overcompensated positive electric field in most vertical field measurements performed very close to the channel core is explained using the extended generalized traveling current source (extended GTCS) return stroke model with current reflections from the ground. New effects in the corona sheath due to the reflection of current pulses have been noted and taken into account. The channel-base current is separated into two components. The first current component is fast and with a greater peak value, while the second component is slower and with a lower peak. We've analyzed a return stroke for which the channel-base current and the electric field waveform very close to the triggered lightning are measured simultaneously. A new charging function is calculated according to the extended GTCS model, as well as the value of the ground reflection coefficient for the analyzed stroke. On one hand, new results are obtained through calculations of the channel charging function. On the other, the calculated values of the ground reflection coefficient confirm the results reported in other independent studies performed in natural or laboratory conditions. Finally, the concept of the extended GTCS model, that takes into account current pulse reflections from the ground, is proved to be correct.

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Section: Introductionsupporting

confidence: 76%

Section: A New Corona Sheath Modelmentioning

confidence: 67%

Electric field close to lightning channel in the presence of current reflections from the ground

Tausanovic¹,

Ignjatovic²,

Cvetić³

et al. 2016

Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MedPower 2016)

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show abstract

“…According to the dynamics of lightning channel corona sheath [ Maslowski and Rakov , , ], lightning channel comprises a fully ionized core that determines a plasma path where current flows and an external corona sheath. The expansion of the corona sheath outward from the channel core is determined by the radial electric field [ Cvetic et al , ]. And the diameter of the channel core is positively proportional to the current flowing in it [ Borovsky , ; Wang et al , ].…”

Section: Observation and Resultsmentioning

confidence: 99%

“…The lightning leader channel consists of a thin core surrounded by an external radially formed corona sheath [ Ignjatovic et al , ; Cvetic et al , ; Maslowski and Rakov , , ]. The charge in the thin channel core will create a radial electric field with the value in excess of the breakdown electric field.…”

Section: Discussionmentioning

confidence: 99%

Correlation between the spectral features and electric field changes for natural lightning return stroke followed by continuing current with M‐components

et al. 2016

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According to the high time‐resolved spectra of two first and a subsequent return strokes and the following continuing current processes overlapped with M‐components in three natural cloud‐to‐ground lightning, the correlation between the total intensity of ionic lines in the spectra and the corresponding amplitude of electric field change and that between the total intensity of the spectra and the apparent diameter of the discharge channel have been investigated. Linear correlations have been found for the above two sets of parameters. The luminous properties along the channel show that the total intensity of ionic lines in the spectra for both the return stroke and M‐components decreases with increasing height along the channel. The total intensity of the spectra and the apparent diameter for the return stroke also go down with increase of the height, while those for M‐components do the reverse.

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“…According to the dynamics of lightning channel corona sheath [e.g., Ignjatovic et al ., ; Maslowski and Rakov , , ; Cvetic et al ., ], the lightning channel consists of a narrow current‐carrying core surrounded by the external corona sheath, the external corona sheath is formed by the radial electric field created by the charge in the thin current‐carrying core. Rakov and Uman [] and Rakov [] have reported that the bulk of the leader charge is stored in the corona sheath whose radius is of the order of meters, while the highly conductive channel core probably less than 1 cm in radius carries essentially all the longitudinal current.…”

Section: Discussionmentioning

confidence: 99%

Correlation between the spectral features and electric field changes of multiple return strokes in negative cloud‐to‐ground lightning

et al. 2017

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Using high time‐resolved spectra and simultaneous records of the electric field change of three negative cloud‐to‐ground (CG) lightning flashes with multiple return strokes, the correlations between the total intensity of ionic lines in the spectra and the corresponding amplitude of the initial electric field change, as well as between the total intensity of the spectra and the channel apparent diameter, have been analyzed. The analysis shows the following: (1) The amplitude of the initial electric field change is roughly proportional to the total intensity of ionic lines. (2) The total intensity of the spectra shows a significant linear correlation with the apparent diameter of the channel. (3) The total intensity of ionic lines for 17 analyzed return strokes decreases with increasing height along the channel, which is consistent with the current variation along the channel in the modified transmission line model; the Master, Uman, Lin, and Standler model; and the Diendorfer‐Uman model. Meanwhile, the total intensity of ionic lines for other two analyzed return strokes along the channel without attenuation, this is consistent with the current variation along the channel in the Bruce‐Golde model, the transmission line model, and the Traveling Current Source model.

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Dynamics of a lightning corona sheath—A constant field approach using the generalized traveling current source return stroke model

Cited by 21 publications

References 26 publications

Electric field close to lightning channel in the presence of current reflections from the ground

Electric field close to lightning channel in the presence of current reflections from the ground

Correlation between the spectral features and electric field changes for natural lightning return stroke followed by continuing current with M‐components

Correlation between the spectral features and electric field changes of multiple return strokes in negative cloud‐to‐ground lightning

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