|Author||Neubauer, F. M. ♦ Goldstein, R. ♦ Acuna, M. H. ♦ Musmann, G.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ HALLEY COMET ♦ COSMIC DUST ♦ COLLISIONS ♦ DATA ♦ DISTURBANCES ♦ ENVIRONMENT ♦ MAGNETIC FIELDS ♦ MASS SPECTROMETERS ♦ SATELLITES ♦ SIZE ♦ SPATIAL DISTRIBUTION ♦ COMETS ♦ DISTRIBUTION ♦ DUSTS ♦ INFORMATION ♦ MEASURING INSTRUMENTS ♦ SPECTROMETERS ♦ Astrophysics & Cosmology- Planetary Phenomena|
|Abstract||The authors 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 cometary 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.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Geophysical Research Letters|
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