Anomalous behaviour of the electron density in a pulsed complex plasma

Berndt, Johannes; Kovačević, Eva; Selenin, V. L.; Stefanović, Ilija; Winter, J.

doi:10.1088/0963-0252/15/1/003

Cited by 61 publications

(58 citation statements)

References 11 publications

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“…RF power is one of the determining factors here. As shown experimentally in (Berndt et al 2006), application of the RF field can decrease the n e in dusty plasma by many times. The specific nature of this effect, which is being debated (Schweigert & Alexandrov 2012), is not important for our discussion.…”

Section: Rf Emission Mechanismmentioning

confidence: 82%

Are Perytons Signatures of Ball Lightning?

Dodin

Fisch

2014

ApJ

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The enigmatic downchirped signals, called "perytons," that are detected by radio telescopes in the GHz frequency range may be produced by an atmospheric phenomenon known as ball lightning (BL). If BLs act as nonstationary radio frequency cavities, their characteristic emission frequencies and evolution timescales are consistent with peryton observations, and so are general patterns in which BLs are known to occur. Based on this evidence, testable predictions are made that can confirm or rule out a causal connection between perytons and BLs. In either case, how perytons are searched for in observational data may warrant reconsideration because existing procedures may be discarding events that have the same nature as known perytons.

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Section: Rf Emission Mechanismmentioning

confidence: 82%

Are Perytons Signatures of Ball Lightning?

Dodin

Fisch

2014

ApJ

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“…When the modulation period is made shorter, the periodic steady states are beyond reach, and the charge more or less follows the applied power ( figure 13a). Experiments with modulated discharges in acetylene show a significant increase of the electron density at switch-off [46]. The mechanism behind this is not yet clearly identified.…”

Section: Resultsmentioning

confidence: 98%

Modelling of Voids in Complex Radio Frequency Plasmas

Goedheer

Land

Venema

2009

Contrib. Plasma Phys.

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In this paper hydrodynamic and kinetic approaches to model low pressure capacitively coupled complex radiofrequency discharges are discussed and applied to discharges under microgravity. Experiments in the PKENefedov reactor on board the International Space Station, as well as discharges in which gravity is compensated by means of thermophoresis are simulated with a 2-D cylindrically symmetric hydrodynamic model. Kinetic effects are studied with a 1-D Particle-In-Cell plus Monte Carlo model in which capture and scattering by dust grains is included. Simulations with this model address non-local effects and modulated discharges.

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“…To measure electron density in plasma we used microwave interferometer working at 1 cm wavelength [8]. The spectrograph sampled an aria of 2 by 10 cm 2 through the center of the discharge.…”

Section: Methodsmentioning

confidence: 99%

Plasma Analogue for Astrophysical Dust

Stefanović¹,

Kovačević²,

Bendt³

et al. 2007

AIP Conference Proceedings

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Carbonaceous compounds are a significant component of interstellar dust and the composition and structure of such materials is therefore of key importance. We present 1.5 µm-15 µm spectra of a plasma polymerized carbonaceous material produced in RF discharge under low pressure, using C 2 H 2 as a precursor component. The plasma polymerization process described here provides a convenient way to make carbonaceous interstellar dust analogues under controlled conditions and to compare their characteristics to astronomical observations. Here, we focus on a comparison to the IR spectra of interstellar dust in the light of the criteria for "good" carbonaceous interstellar dust analogue. The UV bump at extinction curve 217.5 nm is another key feature for understanding the abundance of carbon in interstellar media. We present here some preliminary results of UV extinction on plasma polymerized astro-analogue.

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Anomalous behaviour of the electron density in a pulsed complex plasma

Cited by 61 publications

References 11 publications

Are Perytons Signatures of Ball Lightning?

Are Perytons Signatures of Ball Lightning?

Modelling of Voids in Complex Radio Frequency Plasmas

Plasma Analogue for Astrophysical Dust

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