FIELD: electricity.
SUBSTANCE: in plasma accelerator with closed electron drift walls of inner and outer step rings in acceleration area are installed at angle to each other and topology of magnetic field lines in the area of these walls is configured so that accelerator channel is extended towards working gas flow. At that tilt angle of magnetic field lines at the point of their crossing with walls is mainly more than 90° with axis of plasma accelerator from hollow anode side. Besides at least ring groove can be made at least at one edge section of walls of inner and outer step rings.
EFFECT: enhancement of operating life for plasma accelerator generating high density impulses.
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