TY  - JOUR
AU  - Meier, Patrick
AU  - Kriegel, Hendrik
AU  - Motschmann, Uwe
AU  - Schmidt, Jürgen
AU  - Spahn, Frank
AU  - Hill, Thomas W.
AU  - Dong, Yaxue
AU  - Jones, Geraint H.
TI  - A model of the spatial and size distribution of Enceladus׳ dust plume
JO  - Planetary and space science
VL  - 104
SN  - 0032-0633
CY  - Kidlington [u.a.]
PB  - Elsevier Science
M1  - FZJ-2016-06661
SP  - 216 - 233
PY  - 2014
AB  - The structure of Enceladus׳ south polar plume of charged dust is studied by simulations of the dust grain dynamics. The model considers the Lorentz force and charging of the grains by the plasma environment within the plume. Simulated dust plumes are investigated by applying 10 selected sets of dust parameters that include variations of the grain production rate, the slope of the grain size distribution and the start conditions (velocity, direction) of the grains. The modeled dust plume profiles are in good agreement with nanograin data of Cassini Plasma Spectrometer (CAPS). Major results are (1) due to the local plasma environment the nanograins are accelerated by the Lorentz force and form a structured tail; (2) due to the finite charging time the peak dust charge density is located about 0.3–0.6rE0.3–0.6rE below Enceladus׳ south pole; (3) nanograins smaller than 10 nm are more than 99% of the produced dust; (4) CAPS data are best matched if the nanograins are launched with high, collimated start velocities; (5) the grain charging time is crucially affected by inhomogeneities in the local plasma environment.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1016/j.pss.2014.09.016
UR  - https://juser.fz-juelich.de/record/824035
ER  -