Long-lived plasmoids produced in humid air as analogues of ball lightning

Egorov, A. I.; Степанов, С. И.

doi:10.1134/1.1529952

Cited by 36 publications

(36 citation statements)

References 2 publications

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“…The plasmoids are described as a cold hydrated plasma with a temperature of about 330 K [2,4], not containing positive charges [1]. The present work repeats these experiments, adding a variety of diagnostics to get better insight into the phenomenon and in particular understand the energy storage mechanism that enables the autonomously radiating behavior.…”

Section: Introductionsupporting

confidence: 51%

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Long-living plasmoids from an atmospheric water discharge

Versteegh

Behringer

Fantz

et al. 2008

Plasma Sources Sci. Technol.

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Ball-like plasmoids were generated from discharging a capacitor bank via a water surface. In the autonomous stage after current zero they have diameters up to 0.2 m and lifetimes of some hundreds of milliseconds, thus resembling ball lightning in some way. They were studied by applying high speed cameras, electric probes, calorimetric measurements, and spectroscopy. The plasmoids are found to consist of a true plasma surrounded by a cold envelope. Decreasing electron densities in the order of 10 20 m −3 to 10 22 m −3 were measured from Stark broadening in the initial (formation) phase. The electron temperature is estimated to be 2000-5000 K during most of the plasmoid's lifetime. The temperature of the neutral particles can exceed 1300 K. Calcium hydroxide molecular band emission is the major source of visible radiation in the autonomous phase. Chemiluminescence reactions between dissociation products of water and dissolved calcium are proposed as a source for this emission. The plasmoid's colder boundary layer consists of electric double layers that may attribute to the characteristic shape of the balls.

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Section: Introductionsupporting

confidence: 51%

“…[2,4]. Taking the radiated power and the ball size from figure 4 at t=180 ms and applying the StefanBoltzmann law one obtains a temperature of 920 K, in agreement with the direct reading of the thermocouples (about 900 K).…”

Section: Discussionmentioning

confidence: 49%

Long-living plasmoids from an atmospheric water discharge

Versteegh

Behringer

Fantz

et al. 2008

Plasma Sources Sci. Technol.

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“…Further studies on effect of electric field on hydrogen bonding in water, especially understanding nature of bonding in longitudinal and transverse directions will enable further elucidation of the problem. Attempts have been made to produce BL in the laboratory [44][45][46]. Model is expected to provide clues for such experimentation.…”

Section: Resultsmentioning

confidence: 98%

A Model of Ball Lightning as a Formation of Water Molecules Confining an Electric Charge and the Classical Theory of the Electron

Tennakone

2011

Int J Theor Phys

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Ball lightning or faintly luminous floating spheres with radii of the order of ten centimeters appearing transiently in air notably during stormy weather continue to remain an unresolved phenomenon. It is suggested that these objects are organized structures constituted of an electrically charged spherical thin shell of electro-frozen dipole oriented water molecules carrying an electric charge, balanced by the internal negative pressure and outward electrostatic stress. A model presented, resembling the classical theory of the electron with Poincare stresses explain almost all observed attributes of this phenomenon. The possibility of realizing macroscopic spherical surface charge distributions in the vacuum and their implication on the problem of electron are commented.

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“…We perform integration to obtain the limiting current 1 The well-known expression for the limiting current, derived by Lawson, is , where the dependence I L (f)…”

Section: Mechanism and Theory Of The Process Of Forming Of A Plasmoidmentioning

confidence: 99%

“…Great interest is shown at present in the problem of producing compact long-lived energy-intensive plasma formations (plasmoids) with significantly nonequilibrium components [1][2][3]. This interest is due to a large number of possible applications of plasmoids associated, for example, with the problem of ball lightning, as well as with the investigations of controlled thermonuclear fusion.…”

Section: Introductionmentioning

confidence: 99%

Producing a compact long-lived plasma formation

et al. 2004

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A method of producing compact long-lived plasma formations (plasmoids) is described. The method is based on the effect of capture of a high-current relativistic electron beam under conditions of significant overcompensation of space charge of the beam by positive background ions. Requirements are formulated which are placed on the parameters of a plasma-beam system for the realization of this method, and numerical estimates are given of the overall electric charge and energy content of the electron component of a plasmoid. The dynamics of forming a plasmoid are investigated experimentally.

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Long-lived plasmoids produced in humid air as analogues of ball lightning

Cited by 36 publications

References 2 publications

Long-living plasmoids from an atmospheric water discharge

Long-living plasmoids from an atmospheric water discharge

A Model of Ball Lightning as a Formation of Water Molecules Confining an Electric Charge and the Classical Theory of the Electron

Producing a compact long-lived plasma formation

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