Abstract
The evolution of the plasma obtained from magnetic probes and otherelectrical measurements in a coaxial gun with a Ti central electrode (cathode)used for coating studies in a mbar N2 atmosphere is given. Theresults indicate that the currently used snowplough models adequately describethe cinematic of the plasma current sheet only if an additional mass to thatof the gas between electrodes is included in the plasma sheet. The need toinclude extra mass is taken as evidence of relevant erosion of the centralelectrode, in accordance with the production of substantial coatings insimilar devices. Evidence that sizeable portions of the discharge currentremain attached near the end of the electrode system is presented, and some ofthe implications for the use of these devices for coating purposes arediscussed.
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