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Förslaget inkom 2009-03-19

Distribution of trapped photoelectrons in the magnetosphere of Mercury

OBS! ANSÖKNINGSTIDEN FÖR DETTA EXJOBB HAR LÖPT UT.
Mercury has a planetary magnetic field which is weak compared to that of the Earth, but significant enough for a magnetosphere to be set up around the planet. The details of the field are poorly known, although the few measurements that have been made indicate that it may be approximated by a dipole which is offset by about 0.2 planetary radii relative to the centre of the planet. The dipole offset has interesting consequences for the planetary photoemission, which have been addressed in an earlier project (Baselga Bacardit, KTH report XR-EE-SPP 2007:002). The current project aims to further analyse how the photoelectrons are distributed along the planetary magnetic field lines as a function of different assumptions regarding the planetary conductivity. The initial approximation is to consider the motion of the electrons independently. Time permitting, a refinement is to make the model self-consistent by including the effect of space charge on the particle motion, which will also address the highly interesting possibility of sheath formation close to the surface and, thus, (partial) shielding of the magnetosphere from the planetary photoelectrons.

Basic knowledge of space and/or plasma physics is required. Familiarity with Matlab programming is desirable.

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