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Measurement of Dust Electric Charges by the Ulysses and Galileo Dust Detectors

Published online by Cambridge University Press:  27 February 2018

J. Svestka ,
S. Auer ,
M. Baguhl  and
E. Grün
J. Svestka
Affiliation:
Prague Observatory, Petrin 205, 11846 Prague 1, Czech Republic
S. Auer
Affiliation:
Prague Observatory, Petrin 205, 11846 Prague 1, Czech Republic
M. Baguhl
Affiliation:
Prague Observatory, Petrin 205, 11846 Prague 1, Czech Republic
E. Grün
Affiliation:
Prague Observatory, Petrin 205, 11846 Prague 1, Czech Republic

Extract

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The Galileo and Ulysses dust detectors can detect electric charges of dust particles. Dust particles entering the sensor (see, e.g., Grün et al. 1992) may be detected by the charge Qp that they induce to the charge grid. All suitably massive dust particles - charged or uncharged - are then detected by the cloud of ions and electrons they produce during the impact on the hemispherical target after the time of flight between the charge grid and the target. After separation in the electric field, ions and electrons are collected by separate electrodes and produce two pulses of opposite polarity. From the two pulse heights and the rise times, the mass and impact speed of the dust particle are derived.

Type
XII. Physical Processes and Laboratory Analyses
Information
International Astronomical Union Colloquium , Volume 150: Physics, Chemistry and Dynamics of Interplanetary Dust , 1996 , pp. 481 - 484
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Grün, et al. 1992, Astron. Astrophys. Suppl. Ser. 92, 411 Google Scholar
Leinert, Ch. and E., Grün 1990, in Physics of the Inner Heliosphere I, R. Schwenn & E. Marsch, Berlin Heidelberg: Springer-Verlag, 207Google Scholar
Mendis, D.A. 1981, in Investigating the Universe, Kahn, F.D., Dordrecht: Reidel, 353 Google Scholar
Mukai, T. 1991, in Origin and Evolution of Interplanetary Dust, Levasseu-Regourd, A.C. & H. Hasegawa, Dordrecht: Kluwer, 371CrossRefGoogle Scholar