Physics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382..343v&link_type=abstract
Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 343
Physics
Heliopause And Solar Wind Termination, Solar Wind Plasma, Sources Of Solar Wind, Electromagnetic Waves
Scientific paper
Dusty plasmas contain charged dust grains which are much more massive than protons and carry high negative charges due to preferential capture of electrons. Fluctuations in the grain charges due to capture or liberation of additional electrons and protons translate as momentum losses or gains, which can lead to wave damping or growth. Many authors have addressed the pickup of ions of cometary origin by the solar wind, partly due to relative streaming between cometary and solar wind ions which excites low-frequency electromagnetic turbulence. In the present work we include effects due to charged dust in cometary environments. We have investigated several frequency regimes: nonresonant below the cometary charged dust gyrofrequency (new and interesting but highly unlikely!), nonresonant below the cometary watergroup gyrofrequency and resonant with the cometary watergroup ions. For most parameter ranges either existing instabilities can be enhanced, showing that charged dust facilitates the cometary ion pickup by the solar wind, or new instabilities or damping mechanisms have been shown to exist.
Meuris Peter
Verheest Frank
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