Filamentation of Volcanic Plumes on the Jovian Satellite IO

Peratt, Anthony L.; Dessler, A. J.

doi:10.1007/978-94-009-3021-6_31

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Perhaps. as the atmospheric conductivity decreases during eclipse, a greater share of the cu1Te11t through lo is conducted by the volcanic plumes (23).…”

Section: Galileo Imaging Of Atmospheric Emissions From Lomentioning

confidence: 99%

Galileo Imaging of Atmospheric Emissions from Io

Geissler

McEwen

et al. 1999

Science

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The Galileo spacecraft has detected diffuse optical emissions from Io in high-resolution images acquired while the satellite was eclipsed by Jupiter. Three distinct components make up Io's visible emissions. Bright blue glows of more than 300 kilorayleighs emanate from volcanic plumes, probably due to electron impact on molecular sulfur dioxide. Weaker red emissions, possibly due to atomic oxygen, are seen along the limbs, brighter on the pole closest to the plasma torus. A faint green glow appears concentrated on the night side of Io, possibly produced by atomic sodium. Io's disk-averaged emission diminishes with time after entering eclipse, whereas the localized blue glows brighten instead.

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“…Perhaps. as the atmospheric conductivity decreases during eclipse, a greater share of the cu1Te11t through lo is conducted by the volcanic plumes (23).…”

Section: Galileo Imaging Of Atmospheric Emissions From Lomentioning

confidence: 99%

Galileo Imaging of Atmospheric Emissions from Io

Geissler

McEwen

et al. 1999

Science

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“…Others can be simulated in experiments made in the laboratory. This is the case of the plasma-focus experiment [1], which reproduces some astrophysical phenomena, for example, the volcanic phenomena in a Jovian satellite [2]; in addition, it could be applied to space problems as plasma instabilities, solar flares, and aurorae to clarify some of the still not understood processes involved in Alfvén's critical velocity [1], [3].…”

Section: Introductionmentioning

confidence: 99%

Filaments in the Sheath Evolution of the Dense Plasma Focus as Applied to Intense Auroral Observations

Milanese

Niedbalski

Moroso

2007

IEEE Trans. Plasma Sci.

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This paper investigates the dense plasma focus (DPF) for applications in space-plasma physics. The plasma focus (a variant of Z-pinch) generates plasmas from fast high-voltage electrical discharges on coaxial electrodes suitable for very different studies: from fusion up to plasma-space modeling. In particular, the plasma sheath of the DPF is studied here and measured in some detail as a possible model for auroral observations. Deuterium gas was used in the experiments, and many helpful techniques were used, such as ultrafast photograph and neutron detection from nuclear-fusion reactions. In this paper, we show the different phases of the plasma focus correlated with discharge-current characteristics and neutron and X-ray production. Filamentary formations in the current sheath are shown, and its correlation with neutron production is done. The same number of filaments (about 60) reported in auroral observations are detected in plasma-focus discharges.

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“…Partial conversion of the kinetic energy of the imploding axisymmetric current to internal heat energy may occur during the implosive phase due to self-collision. 6 The experimental results indicated that local electron concentrations in the hot spots or plasmoids can exceed 10 26 -10 27 m −3 , while the local electron temperatures can obtain values above 1 keV. 7,8 The main focuses of the simulation presented in this work were ͑a͒ the interaction of multiple current filaments, ͑b͒ coalescence in the pinch effect of the DPF, and ͑c͒ plasma heating.…”

Section: Introductionmentioning

confidence: 98%