On modeling of “plasmoid” created by electric discharge

Бычков, В. Л.; Anpilov, S. V.; Савенкова, Н. П.; Stelmashuk, V.; Hoffer, Petr

doi:10.1088/1742-6596/996/1/012012

Cited by 9 publications

(8 citation statements)

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“…Плазмоид представляет собой в это время кольцеобразный плазменный вихрь, имеющий тороидальное вращение (там же). С этой схемой согласуются результаты газодинамического математического моделирования, о котором говорилось выше [10,11].…”

Section: установка для получения и исследования плазмоидаunclassified

“…Время наблюдения в видимом свете составляет величину до 500−600 ms, а в инфракрасном свете -до 1200 ms [9]. Структура, движение и температура плазмоида успешно исследуются не только экспериментально, но и методом численного газодинамического моделирования [10,11].…”

Section: Introductionunclassified

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Исследование Величины И Механизма Образования Заряда Атмосферного Плазмоида

Степанов¹

2023

Журнал Технической Физики

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Продолжено исследование долгоживущего автономного атмосферного плазмоида (Гатчинский плазмоид). Электрический заряд плазмоида обнаружен нами ранее с помощью плазменного зонда. Здесь измерительная аппаратура была усовершенствована, что позволило учесть влияние тока смещения. Измеренный заряд отрицательного плазмоида составлял около -35 nC. Установлено, что плазмоид получает заряд во время протекания тока разряда. После выключения тока заряд не стекает на электроды, предположительно из-за быстрого уменьшения концентрации заряженных частиц и уменьшения проводимости плазмы между плазмоидом и электродами. Показано, что электрический заряд является свойством плазмоида, как это ранее и полагали в отношении шаровой молнии. Ключевые слова: атмосферный плазмоид, высоковольтный разряд, плазменный зонд, шаровая молния, электрический заряд.

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Section: установка для получения и исследования плазмоидаunclassified

Section: Introductionunclassified

Исследование Величины И Механизма Образования Заряда Атмосферного Плазмоида

Степанов¹

2023

Журнал Технической Физики

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“…In [10], using observations in the infrared spectrum, it was noted that the afterglow exists for more than 1 second and has a characteristic ring shape, from which it was concluded that a toroidal vortex structure is formed inside the afterglow. The idea of the presence of a toroidal vortex in the forming long-lived afterglow was developed in [11,12], where a gas-dynamic model of this nonstationary discharge was proposed. Such a toroidal vortex structure may well be the reason for the stable existence of afterglow in free space, just as, for example, this is the case with smoke rings.…”

Section: Introductionmentioning

confidence: 99%

“…This discharge was first described in [1,2] more than two decades years ago, where it's basic characteristics and the resulting long-lived afterglow were described. In a large number of subsequent works, this discharge was studied in detail by various scientific groups around the world [3][4][5][6][7][8][9][10][11][12]. In [3][4][5][6], an analysis was carried out in order to establish the relationship between the shape, size, speed and time of autonomous existence of the discharge afterglow with energy.…”

Section: Introductionmentioning

confidence: 99%

Visualization of the vortex structure formation of a long-lived afterglow arising in a symmetrical pulsed discharge

Kudryavtsev,

Yuan,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

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A visualization of the emerging toroidal vortex in the long-lived afterglow of a high-current symmetrical pulse discharge with an electrolyte anode has been carried out. The visualization of the emerging vortex flow was carried out using the laser knife method using a powerful 10 W laser, which formed a flat divergent beam, which was reflected from dust particles in the atmosphere. For greater contrast, water vapor was let in into the region of the discharge and the emerging afterglow, which moved synchronously with the emerging afterglow vortex. The laser beam reflected from small water vapor droplets made it possible to visualize the gas flow, which was then filmed with a high-speed video camera. The presented data clearly show that the emerging afterglows are able to retain their volume for a long time precisely due to the formation of a vortex structure.

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“…A gas-dynamic model was proposed to describe the stable structure of the emerging long-lived afterglow in refs. [16,17], and its comparison with experimental data was elaborated in ref. [17].…”

Section: Introductionmentioning

confidence: 99%

Microwave diagnostics of pulsed atmospheric discharge with electrolytic electrode and long‐lived luminous formation in its afterglow

Zhao,

Lyu,

Astafiev

et al. 2023

High Voltage

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The Gatchina discharge phenomenon holds significant promise as a laboratory model for simulating ball lightning. However, crucial aspects concerning the plasma components of the resulting afterglow remain unresolved. Notably, the measurement of the electron density, a critical parameter, has not been fully achieved thus far. In this study, microwave diagnostics and video recording were employed during a pulsed Gatchina discharge, along with synchronous measurement of discharge current and voltage. Distinct antennas were positioned at different heights to enable separate diagnosis of the discharge and the ensuing long‐lived afterglow. The findings revealed that during the active phase of the Gatchina discharge, the plasma density was substantial enough to cause reflection of an electromagnetic wave with a frequency of 20 GHz from this highly conductive object. In the afterglow, the signal experienced only a moderate weakening of 10–20 percent, facilitating the determination of the time dependence of average electron density during the afterglow's passage between the two antennas. These measurements verified the unusually slow plasma decay in the afterglow of the Gatchina discharge, suggesting the potential significance of chemi‐ionisation processes involving long‐lived (metastable) particles.

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On modeling of “plasmoid” created by electric discharge

Cited by 9 publications

References 0 publications

Исследование Величины И Механизма Образования Заряда Атмосферного Плазмоида

Исследование Величины И Механизма Образования Заряда Атмосферного Плазмоида

Visualization of the vortex structure formation of a long-lived afterglow arising in a symmetrical pulsed discharge

Microwave diagnostics of pulsed atmospheric discharge with electrolytic electrode and long‐lived luminous formation in its afterglow

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