Journal
PLASMA SOURCES SCIENCE & TECHNOLOGY
Volume 28, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6595/ab1b00
Keywords
crossed field diffusion; non-boltzmann distribution; short circuiting effect; ion impediment
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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 a magnetic field, plasma potential and density profiles follow the Boltzmann distribution. However when a magnetic field is introduced, a clear divergence from Boltzmannian is seen as the plasma density becomes more pronounced in the centre whereas a corresponding minima is observed in plasma potential. This radial potential profile impedes 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.
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