Exjobbsförslag från företag
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Förslaget inkom 2008-05-30
De-charging of dust grains suspended in plasma under microgravity conditions
OBS! ANSÖKNINGSTIDEN FÖR DETTA EXJOBB HAR LÖPT UT.
This M Sci thesis project is one of several that are offered in a cooperation between KTH and the Max Planck Institute in Garching, Germany. The project is to analyze data from a plasma experiment on board the International Space Station, ISS. During the course of the project a visit to our collaborators at the Max Planck will be needed. Suitable background includes basic knowledge of plasma physics. Some programming skills and the ability to master the use of new software is desirable.
Pilot experiments with PKE-Nefedov have been performed to study the de-charging of dust grains suspended in plasma in microgravity conditions, and a good agreement between theoretical expectations/predictions and the experiments has been achieved. Later an extensive experimental campaign has been carried out in order to investigate these phenomena in-depth. When the rf power is switched off, ions and electrons rapidly recombine and leave a cloud of charged microparticles in the afterglow plasma. In microgravity, the particles remain suspended in the experimental chamber for a sufficiently long time, allowing precise measurements of the residual particle charge. Currently the data from this latter campaign are to be analysed. In the M Sci thesis offered here, detailed data analysis is to be performed with the goal to provide test for the original ideas.
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