Hypervelocity dust particle impacts observed by the Giotto Magnetometer and Plasma Experiments

Neubauer, F. M.; Glaßmeier, Karl‐Heinz; Coates, A. J.; Goldstein, R.; Acuña, M. H.; Musmann, G.

doi:10.1029/gl017i011p01809

Cited by 19 publications

(14 citation statements)

References 13 publications

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“…Creation of a plasma cloud and its expansion should necessarily lead to changes of magnetic field strength. The behavior of the magnetic field in this event is typical for all dust impacts registered by the magnetorneter [Neubauer et al, 1990]. A short,, sudden decrease in the magnetic field was followed by a slower recovery and an overshoot.…”

Section: Introductionmentioning

confidence: 57%

“…We believe, however, that, including such fine effects a,s screening in a rather rough model is not jus- There is no doubt that the coincidence of the particle burst and the magnetic field jump (Figure 1) is not, accidental. Neubauer et al [1990] related this event to the impact of a, dust particle against the spacecraft. Creation of a plasma cloud and its expansion should necessarily lead to changes of magnetic field strength.…”

Section: Introductionmentioning

confidence: 99%

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A Giotto/cometary dust interaction event near the diamagnetic cavity boundary

Israelevich¹,

Ershkovich²

1994

J. Geophys. Res.

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A new scenario is suggested in order to explain the burst of particles observed by Giotto near the Halley ionopause. According to this scenario, an impact of a cometary dust particle against the Giotto spacecraft (identified by Neubauer et al. (1990)) creates a gas/plasma cloud. Cold cometary ions with a velocity of 70 km/s that impinge on the cloud around the spacecraft are scattered by the secondary ions/neutral species in the cloud. This scattering is shown to allow the cometary ions to enter the angular detectors. This mechanism casts some doubt on alternative explanations of the observed phenomenon and thereby may call into question the very existence of suprathermal particles near the Halley ionopause.

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Section: Introductionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

A Giotto/cometary dust interaction event near the diamagnetic cavity boundary

Israelevich¹,

Ershkovich²

1994

J. Geophys. Res.

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“…during comet and planetary rings encounters and in the interplanetary medium (see e.g. [70,161,180,182,183,71,223]). Motivated by observations, the physics underlying the dust observations with radio and plasma wave instruments has been discussed (see reviews [184,164]), Observations have been recently refined by using a new generation of high speed radio receivers [243,124].…”

Section: Dust and Meteoroids Entering Earth Atmospherementioning

confidence: 99%

Dust in the planetary system: Dust interactions in space plasmas of the solar system

Mann¹,

Meyer‐Vernet²,

Czechowski³

2014

Physics Reports

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Cosmic dust particles are small solid objects observed in the solar planetary system and in many astronomical objects like the surrounding of stars, the interstellar and even the intergalactic medium. In the solar system the dust is best observed and most often found within the region of the orbits of terrestrial planets where the dust interactions and dynamics are observed directly from spacecraft. Dust is observed in space near Earth and also enters the atmosphere of the Earth where it takes part in physical and chemical processes. Hence space offers a laboratory to study dust plasma interactions and dust dynamics. A recent example is the observation of nanodust of sizes smaller than 10 nm. We outline the theoretical considerations on which our knowledge of dust electric charges in space plasmas are founded. We discuss the dynamics of the dust particles and show how the small charged particles are accelerated by the solar wind that carries a magnetic field. Finally, as examples for the space observation of cosmic dust interactions, we describe the first detection of fast nanodust in the solar wind near Earth orbit and the first bi-static observations of PMSE, the radar echoes that are observed in the Earth ionosphere in the presence of charged dust.

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“…In the case of very large dust particle impacts at high relative speeds, the diamagnetic effects of the resultant plasma cloud can be detected by dc magnetometers. Neubauer et al [1990] and Wagner and Neubauer [1992] reported such effects of dust impacts at comet P/Halley. In this paper we will report the detection of plasma clouds produced by comet P/Borrelly dust hits on the DS1 spacecraft using the plasma wave dipole antenna and the dc magnetometer data.…”

Section: Introductionmentioning

confidence: 97%

Dust impacts at Comet P/Borrelly

Tsurutani

Clay

Zhang

et al. 2003

Geophysical Research Letters

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[1] The NASA DS1 spacecraft flew past comet P/Borrelly on September 22, 2001, on the sunward side of the comet. Dust impacts were detected by sharp increases (or decreases) in electric fields measured by the plasma wave dipole antennae. Electric pulses from as small as 0.014 Vm À1 to saturation ($±0.8 Vm À1 ) were detected. Pulse overshoots were noted in the largest electric pulses. No simultaneous dc magnetic signatures >1 nT were detected in the magnetometer data. Assuming that cometary dust grains propagating in the sunward direction were decelerated by solar radiation pressure, arguments are made that the size of the earliest dust particles detected were probably $0.4 mm in radius. Elaboration of the characteristics of these electric pulses and pulse overshoots and their interpretations will be reserved for a subsequent work.

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Hypervelocity dust particle impacts observed by the Giotto Magnetometer and Plasma Experiments

Cited by 19 publications

References 13 publications

A Giotto/cometary dust interaction event near the diamagnetic cavity boundary

A Giotto/cometary dust interaction event near the diamagnetic cavity boundary

Dust in the planetary system: Dust interactions in space plasmas of the solar system

Dust impacts at Comet P/Borrelly

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