N. G. Cherepanov, А. А. Zhukov, V. I. Krylov
The Khabarovsk State Pedagogical University, Khabarovsk, Russia
It was made the experiments on investigation of requirement for origin of the high-frequency (with the component of a stationary electric field) discharges in an air gap at coefficient of electric field inhomogeneity of 3.7. It is shown that there are values of physical parameters (pressure, frequency, voltage of a variable and stationary component of electric field), at which there is a rise of different types of the dischanges. It mean physically that it is possible to speak about phase states of ionization air in a nonuniform electric field and about phase transitions at change of relations, for example, between amplitude of alternate electric field voltage and gas pressure. It are built the two-dimensional and three-dimensional phase spaces, in which are spotted areas of the corona and spark discharges, disjointed by curves or surfaces (in three-dimensional space), being an analog of curves of phases equilibrium.
