The previously described algorithm for numerical simulation of electrons motion through a gas-filled accelerating gap has been applied to estimate the effect of the runaway electrons phenomenon on their ionization ability. It has been shown that when the runaway frequency reaches 109 s-1 the electron ionization ability and associated impact ionization coefficient start to decrease. This fact should be taken into account when gas discharge formation process is under consideration.Работа поддержана грантом РФФИ №16-08-00894-а
