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

Neubauer, FM; Glassmeier, KH; Coates, AJ; Goldstein, R; Acuña, MH; Musmann, G; (1990) Hypervelocity dust particle impacts observed by the Giotto Magnetometer and Plasma Experiments. Geophysical Research Letters , 17 (11) 1809 - 1812. 10.1029/GL017i011p01809. Green open access

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Abstract

We report thirteen very short events in the magnetic field of the inner magnetic pile‐up region of comet Halley observed by the Giotto magnetometer experiment together with simultaneous plasma data obtained by the Johnstone plasma analyzer and the ion mass spectrometer experiments. The events are due to dust impacts in the milligram range on the spacecraft at the relative velocity between the cemetery dust and the spacecraft of 68 km/sec. They are generally consistent with dust impact events derived from spacecraft attitude perturbations by the Giotto camera [Curdt and Keller, private communication]. Their characteristic shape generally involves a sudden decrease in magnetic field magnitude, a subsequent overshoot beyond initial field values and an asymptotic approach to the initial field somewhat reminiscent of the magnetic field signature after the AMPTE releases in the solar wind. These observations give a new way of analyzing ultra‐fast dust particles incident on a spacecraft.

Type: Article
Title: Hypervelocity dust particle impacts observed by the Giotto Magnetometer and Plasma Experiments
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/GL017i011p01809
Publisher version: http://dx.doi.org/10.1029/GL017i011p01809
Language: English
Additional information: Copyright 1990 by the American Geophysical Union
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/81968
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