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| Titel |
Sputtering of glass dust grains |
| VerfasserIn |
Marek Vysinka, Jakub Vaverka, Jiri Pavlu, Jana Safrankova, Zdenek Nemecek |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250074215
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| Zusammenfassung |
| Dust grains in space are exposed to energetic ions, electrons and UV irradiation. Impact of
energetic ions can lead to sputtering of the grain, consequently resulting in grain destruction
during long-term exposures.
For the presented study we chose spherical SiO2 grains with diameter in the range of 1
micron as a representative of silicate-type space dust. Our experimental set-up enables us to
catch and to store single dust grain which can be sputtered by the ion beam. The mass of the
grain is measured after each sputtering session and we can judge the sputtering efficiency
from temporal changes of the mass.
Our results suggest that the mass change is around 1.5% per 3-hour bombardment of
1.1Â keV Ar ions which corresponds to the yield of the order of unity. The measurements on
glass grains are compared wit previous measurements on gold grains. |
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