observation of auroral emissions induced by artificial plasma jets

Erlandson, R. E.; Swaminathan, P. K.; Meng, C. I.; Stoyanov, B. J.; Zetzer, J. I.; Гаврилов, Б. Г.; Kiselev, Yu. N.; Romanovsky, Y.M.

doi:10.1029/1999gl900282

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…The absence of contaminant products associated with the shaped-charge lining was confirmed during the previous Fluxus experiment using spectral observations from the MSX satellite from 110 to 900 nm (Ref. 13). The ETG devices and the payloads containing the ETGs are destroyed by the 9.7 kg of high explosives.…”

Section: Explosive-type Generators (Plasma-jet Source)mentioning

confidence: 74%

“…The presence of aluminum spectral features in the jet was also detected by the spectrographs on the MSX satellite during the North Star mission (data not shown) and are similar to the spectra recorded during the earlier Fluxus experiments. 13 The PDP contained forward-and aft-looking photometers. The forward-looking photometer measured the injection time (from the initial flash), while the aft-looking photometer observed the jet as it passed the payload.…”

Section: Optical Emissionsmentioning

confidence: 99%

“…12 The spectra observed using MSX were dominated by aluminum line emissions, as expected, although other lines characteristic of natural auroral and airglow emissions were also observed, presumably generated by a flux of electrons responsible for plasma jet neutralization. 13 The North Star mission 14 was designed to study the far-field effects of high-speed plasma jets on the space environment. The goals of the North Star mission were to address, through data analysis and modeling, issues relating to the propagation of high-speed plasma jets across magnetic field lines, to investigate the role of the neutral atmosphere in secondary jet ionization processes, and to assess the CIV hypothesis.…”

Section: Introductionmentioning

confidence: 99%

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North Star Plasma-Jet Space Experiment

Erlandson¹,

Swaminathan²,

Kumar³

et al. 2004

Journal of Spacecraft and Rockets

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The objective of the Active Plasma Experiment North Star mission was to study the interaction of artificially produced aluminum ion plasma jets with the space environment. Two separate plasma jets were injected almost perpendicular to the local magnetic field during the North Star experiment. The jets were created using an explosivetype generator designed to produce a high-speed (7-42-km/s) aluminum ion plasma jet with plasma densities exceeding 10 9 cm −3 at a distance 170 m from the plasma-jet source. The first plasma-jet injection occurred at an altitude of 360 km and was preceded by the release of an artificial air cloud. The second injection occurred at an altitude of 280 km and did not include the air cloud. Interactions of the plasma jet with the local space environment and artificial air cloud were monitored using instrumentation on three diagnostic payloads, ground-based optical sensors, and space-based optical sensors. An overview is provided of the experiment, along with a summary of the principal results from the mission.

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Section: Explosive-type Generators (Plasma-jet Source)mentioning

confidence: 74%

Section: Optical Emissionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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North Star Plasma-Jet Space Experiment

Erlandson¹,

Swaminathan²,

Kumar³

et al. 2004

Journal of Spacecraft and Rockets

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“…The source for the substance release in the ionosphere in these experiments is the generator of high-speed plasma jets. Their scheme is analogous to that of the "Fluxus" and "North Star" experiments carried out at altitudes of 140, 280, and 360 km (Gavrilov et al, 1998;Erlandson et al, 1999).…”

Section: Active Rocket Experiments In Near-earth Spacementioning

confidence: 99%

Charged dust and shock phenomena in the Solar System

Popel

Gisko

2006

Nonlin. Processes Geophys.

127

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Abstract.The results on shock phenomena in dusty plasmas of the Solar System are reviewed. The problems of dust ion acoustic bow shock in interaction of the solar wind with dusty cometary coma and formation of transient atmospheres of atmosphereless cosmic bodies such as Moon, Mercury, asteroids and comets are considered. The latter assumes the evolution of meteoroid impact plumes and production of charged dust grains due to the condensation of both the plume substance and the vapor thrown from the crater and the surrounding regolith layer. Physical phenomena occurring during large meteoroid impacts can be modeled with the aid of active rocket experiments, which involve the release of some gaseous substance in near-Earth space. New vistas in investigation of shock processes in natural dusty plasmas are determined.

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“…The expansion of a high temperature gas cloud in a rarefied environment is a phenomenon that has many applications in space from supernova explosions to recent active space experiments 1 where the interaction of an artificial plasma gas cloud with the ambient atmosphere was studied. In the rapid expansion of a gas cloud, a spherical shock wave front propagates into the ambient atmosphere followed by a contact surface, which separates the expanding gas cloud mass from that of the ambient environment, and a rarefaction wave propagates towards the center of the source in the expanding gas.…”

Section: Introductionmentioning

confidence: 99%

Simulations of gas cloud expansion using a multi-temperature gas dynamics model

Dogra¹,

Erlandson²,

Swaminathan³

et al. 2001

AIP Conference Proceedings

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Abstract.Simulations are performed using a multiple temperature gas model to investigate translational non-equilibrium effects in a rapid expansion of a high temperature argon gas cloud into a rarefied atmosphere. A set of continuum conservation equations based on kinetic theory, which includes anisotropic forms for the temperature, pressure and speed ratio, are solved numerically using a flux splitting scheme for the inviscid fluxes and a central difference scheme for the viscous fluxes in a time accurate manner. Results obtained for the initial expansion of the spherical gas cloud from a high density source condition show that translational non-equilibrium exists in the shock front region which propagates into the ambient atmosphere. For a lower density source condition, translational non-equilibrium not only exists in the shock front but also in the inner gas cloud region where the temperature normal to the radial direction freezes at a value just below the initial source temperature.

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observation of auroral emissions induced by artificial plasma jets

Cited by 15 publications

References 12 publications

North Star Plasma-Jet Space Experiment

North Star Plasma-Jet Space Experiment

Charged dust and shock phenomena in the Solar System

Simulations of gas cloud expansion using a multi-temperature gas dynamics model

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