The radial characteristic of a partially magnetized plasma column created by a hot cathode filament is presented. It is found that in the absence of magnetic field, plasma potential and density varies similarly according to Boltzmann distribution. However when magnetic field increases, a clear divergence is seen as the plasma density becomes more pronounced in the centre whereas a corresponding minima is observed in plasma potential; which impede the radial diffusion of positive ions towards the grounded sidewalls. A phenomenological model based on short-circuiting effect is developed, which fairly explains this contrasting behaviour.
A wake is created in a plasma when a macroscopic body blocks the flow of charged particles from entering in to a downstream plasma region. The phenomena leads to a strong depletion in charged particle density behind the obstacle. In this paper, charged particle transport inside an ionization free region behind a macroscopic obstacle has been investigated for the case of a non-flowing, partially magnetized plasma column. Surprisingly, it is found that the transport of hotter electron population inside the void region is enhanced due to the application of axial magnetic field. Furthermore, the radial plasma density and potential variation inside the obstructed region show an opposing trend than the region outside the obstacle. A phenomenological model is given to explain the mechanism behind observing these trends.
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