Flashover breakdown of an insulator in vacuum by a voltage impulse in the presence of a magnetic field

摘要

The flashover strength of Plexiglas insulators subjected to submicrosecond voltage impulses in vacuum and in the presence of a magnetic field that is perpendicular to the insulator surface is studied. Flashover breakdown strength is reduced by magnetic fields of a few kilogauss. Observation by fast‐framing photography does not reveal curvature of the breakdown arc greater than 20°.