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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10288944%21RIV15-MSM-11320___
rdf:type
skos:Concept n15:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1002/2013JE004522
dcterms:description
In the recent years, growing interest in dust charging physics is connected with several lander missions running on or planned to the Moon, Mars, and Mercury for a near future. In support of these missions, laboratory simulations are a potential tool to optimize in situ exploration and measurements. In the paper, we have investigated electrical properties of a Martian soil simulant prepared at the Johnson Space Center under name JSC Mars-1 using the dust charging experiment when a single dust grain is trapped in a vacuum chamber and its secondary electron emission is studied. The exposure of the grain to the electron beam revealed that the grain surface potential is low and generally determined by a mean atomic number of the grain material at a low-energy range (<1keV), whereas it can reach a limit of the field ion emission being irradiated by more energetic electrons. A comparison of model and experimental results reveals an influence of the grain shape and size predominantly in the range of higher (>2keV) electron energies. We discuss possible implications of the secondary electron emission for the presence of lightnings on Mars. In the recent years, growing interest in dust charging physics is connected with several lander missions running on or planned to the Moon, Mars, and Mercury for a near future. In support of these missions, laboratory simulations are a potential tool to optimize in situ exploration and measurements. In the paper, we have investigated electrical properties of a Martian soil simulant prepared at the Johnson Space Center under name JSC Mars-1 using the dust charging experiment when a single dust grain is trapped in a vacuum chamber and its secondary electron emission is studied. The exposure of the grain to the electron beam revealed that the grain surface potential is low and generally determined by a mean atomic number of the grain material at a low-energy range (<1keV), whereas it can reach a limit of the field ion emission being irradiated by more energetic electrons. A comparison of model and experimental results reveals an influence of the grain shape and size predominantly in the range of higher (>2keV) electron energies. We discuss possible implications of the secondary electron emission for the presence of lightnings on Mars.
dcterms:title
Secondary electron emission from Martian soil simulant Secondary electron emission from Martian soil simulant
skos:prefLabel
Secondary electron emission from Martian soil simulant Secondary electron emission from Martian soil simulant
skos:notation
RIV/00216208:11320/14:10288944!RIV15-MSM-11320___
n3:aktivita
n7:Z n7:I n7:S n7:P
n3:aktivity
I, P(GAP209/11/1412), S, Z(MSM0021620860)
n3:cisloPeriodika
1
n3:dodaniDat
n6:2015
n3:domaciTvurceVysledku
n9:1504126 n9:6429106 n9:3875563 n9:9622683 n9:5876265 n9:1973282
n3:druhVysledku
n14:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
44138
n3:idVysledku
RIV/00216208:11320/14:10288944
n3:jazykVysledku
n13:eng
n3:klicovaSlova
secondary electron emission; dust charging; Martian soil simulant
n3:klicoveSlovo
n17:dust%20charging n17:Martian%20soil%20simulant n17:secondary%20electron%20emission
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[4E1E34D7C567]
n3:nazevZdroje
Journal of Geophysical Research - Planets
n3:obor
n10:BL
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
6
n3:projekt
n18:GAP209%2F11%2F1412
n3:rokUplatneniVysledku
n6:2014
n3:svazekPeriodika
119
n3:tvurceVysledku
Richterová, Ivana Vaverka, Jakub Pavlů, Jiří Šafránková, Jana Němeček, Zdeněk Beránek, Martin
n3:wos
000333028400013
n3:zamer
n19:MSM0021620860
s:issn
2169-9097
s:numberOfPages
11
n21:doi
10.1002/2013JE004522
n16:organizacniJednotka
11320