Show simple item record

dc.contributor.authorNemecek, Z.
dc.contributor.authorPavlu, J.
dc.contributor.authorSafrankova, J.
dc.contributor.authorBeranek, M.
dc.contributor.authorRichterova, I.
dc.contributor.authorVaverka, J.
dc.contributor.authorMann, I.
dc.date2011
dc.date.accessioned2016-03-29T12:43:52Z
dc.date.available2016-03-29T12:43:52Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3111
dc.descriptionThe secondary electron emission is believed to play an important role for the dust charging at and close to the lunar surface. However, our knowledge of emission properties of the dust results from model calculations and rather rare laboratory investigations. The present paper reports laboratory measurements of the surface potential on Lunar Highlands Type regolith simulants with sizes between 0.3 and 3 μm in an electron beam with energy below 700 eV. This investigation is focused on a low-energy part, i.e., ≤100 eV. We found that the equilibrium surface potential of this simulant does not depend on the grain size in our ranges of grain dimensions and the beam energies, however, it is a function of the primary electron beam energy. The measurements are confirmed by the results of the simulation model of the secondary emission from the spherical samples. Finally, we compare our results with those obtained in laboratory experiments as well as those inferred from in situ observations.
dc.languageeng
dc.titleLunar dust grain charging by electron impact: Dependence of the surface potential on the grain size
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.source.titleAstrophysical Journal
dc.source.volume738
dc.source.issue1
dc.source.page14
Orfeo.peerreviewedYes
dc.identifier.doi10.1088/0004-637X/738/1/14
dc.identifier.scopus2-s2.0-80052763871


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record