Abstract
The paper presents computational studies of plasma dynamics in a coaxial accelerator used in surface engineering for impulse plasma deposition (IPD). A two-dimensional two-fluid MHD model has been applied to simulate the phenomena in a discharge region. Special attention was paid to investigate formation and evolution of plasmoid behind a current sheet. Gas left in a corner between the insulator and anode surface causes danger of secondary discharge breakdowns behind the main current sheet. Obtained results allowed interpretation of some previous experimental observations.
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