Laboratory demonstration of ball lightning

Egorov, A. I.; Степанов, С. И.; Shabanov, G. D.

doi:10.1070/pu2004v047n01abeh001691

Cited by 33 publications

(32 citation statements)

References 12 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: 52%

“…Recently, the generation of luminous plasmoids at atmospheric pressure produced from a medium current water discharge were described in a number of papers (see [1][2][3] and the references therein). The plasmoids are described as a cold hydrated plasma with a temperature of about 330 K [2,4], not containing positive charges [1].…”

Section: Introductionmentioning

confidence: 99%

“…It is similar to that in refs. [1][2][3] as far as the discharge system is concerned. The cylindrical discharge vessel made of glass or plastics is filled with tap water or distilled water with salt additives.…”

Section: Introductionmentioning

confidence: 99%

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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: 52%

Section: Introductionmentioning

confidence: 99%

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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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“…The objects attracted particular interest because of their possible relation to ball lightning. More recently the same authors described the objects as consisting of rather cold hydrated water clouds having temperatures around 330 K [1] that unlikely contained any noticeable concentration of free electrons [2]. Our group in Berlin succeeded in generating plasmoids using the same mechanism of production, but came to quite a different assessment with respect to the consistence of the luminous balls.…”

Section: Introductionmentioning

confidence: 99%

“…Some years ago G.D. Shabanov and colleges reported on the generation of luminous plasmoids at atmospheric pressure produced from discharges along water surfaces [1,2]. The objects attracted particular interest because of their possible relation to ball lightning.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Long-living Plasmoids at Atmospheric Pressure

Noack

Versteegh²,

Jüttner

et al. 2008

AIP Conference Proceedings

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Abstract. Ball-like plasmoids were generated by 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 milliseconds. They were studied by applying high speed cameras, spectroscopy and an array of lasers. The latter allows to determine the index of refraction and thus give information on the internal structure of the plasmoids.

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Künstlicher Kugelblitz. Leuchtende Plasmabälle im Labor

Fußmann

2008

Physik in unserer Zeit

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Lampen in großer Entfernung oder schlicht Lichtreflexe von gewöhnlichen Blitzen handeln könnte. Leuchtende Plasmabälle im Labor Künstlicher Kugelblitz GERD FUSSMANN Kugelblitze tauchen in vielen Schilderungen auf. Ob sie in der Natur tatsächlich vorkommen, ist bislang unbewiesen. Neue Laborexperimente rücken ihre Existenz durchaus in den Bereich des Möglichen. Derzeit kann man autonom leuchtende Plasmabälle auf zwei unterschiedliche Arten erzeugen. Auch ohne Bezug zum umstrittenen Naturphänomen bieten sie hochinteressante Physik. 246 | Phys. Unserer Zeit | 5/2008 (39)

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Laboratory demonstration of ball lightning

Cited by 33 publications

References 12 publications

Long-living plasmoids from an atmospheric water discharge

Long-living plasmoids from an atmospheric water discharge

Analysis of Long-living Plasmoids at Atmospheric Pressure

Künstlicher Kugelblitz. Leuchtende Plasmabälle im Labor

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