Generator matching with inductively coupled discharge as a load in radio frequency ion thrusters

The analysis for the optimal energy input from the radio frequency (RF) generator into the inductive discharge is carried out. The analysis was performed using the developed equivalent circuits of the inductor with the inductive discharge plasma of the radiofrequency ion thruster. Taking into account the wave model of radiofrequency discharge it was shown that due to the plasma reaction the inductance of coil may vary several times vs. the geometry of the discharge chamber and the plasma density. The mathematical and numerical models of the discharge electric power supply system have been developed and the results of calculations for some models of radiofrequency ion thrusters are presented. In particular, maximum efficiency of the energy input into the considered RF ion thruster discharges was estimated.