Hrechko Y. Dynamics of self-sustained plasma-beam discharge at high energy density

The thesis is devoted to the experimental and theoretical study of the formation conditions and dynamics of the self-sustained plasma-beam discharge at high energy density in the high-current pulsed plasma diode of low pressure with spatial and magnetic means of localization of the space charge double electric layer. It is shown that when the discharge is excited under conditions of dense (above 1016 cm-3) plasma of multiply ionized atoms, the local input of high pulsed power (over 100 MW and specific power over 2 GW/cm2) is possible with a relatively small stored energy in capacitor bank (up to 200 J). The discharge control means are identified, which make it possible to increase the efficiency of pulsed power input to the discharge. A method for calculating the dynamics of active power of a high-current pulsed discharge of the microsecond range is developed. The fundamental features that should be taken into account when calculating active power are indicated. An expression for the capacitance of a strong double layer and an equation for the capacitive component of the double layer current have been obtained. The last expression allows one to select the share of the capacitive current in the total discharge current. The physical modeling of the double layer formation in a stationary system at a reduced energy density has been performed, which showed the stationary existence of the self-sustained plasma-beam discharge.