Investigation of Vacuum Arc Voltage Characteristics Under Different Axial Magnetic Field Profiles

摘要

Characteristics of the arc voltage under different profiles of axial magnetic field wereinvestigated experimentally in a detachable vacuum chamber with five pairs of specially designedelectrodes generating both bell-shaped and saddle-shaped magnetic field profile.The arc columnand cathode spot images were photographed by a high speed digital camera.The dependence ofthe arc voltage on arcing evolution is analyzed.It is indicated that the axial magnetic field profilecould affect the arc behaviors significantly,and the arc voltage is closely related to the arc lightintensity.