Kinetic of little neutral and charged components in lower ionosphere under $x$-ray impulse

The disturbance of atmosphere at the altitudes 60–100 km under $x$-ray impulse is studied. The model of plasma production in disturbed area is built. The possibility of plasma simulation in earlier arterglow (hundreds seconds) in the frames of “little neutral and charged components” and the correction of the choice of air plasma chemical composition are analyzed. The numerical calculations of one-dimension isothermal problem of air plasma production and relaxation during time interval $10^{-8}-10^2$ s after nuclear explosion is made. The ways of improvement of this model are discussed.