Computational studies of plasma dynamics in Impulse Plasma Deposition coaxial accelerator

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.