The radio frequency ion thruster is an impulse generator to be used in space missions. It is a plasma based generator which utilizes electrostatic field between grids to accelerate the ionized gas out of the thruster to generate thrust. An analytical model is used to optimize the geometry of the discharge chamber which contains the inductively coupled plasma. The model is implemented and verified with existing thrusters and the results of the optimization process are presented. The results of

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... r optimization routine validate the recent trend in radio frequency thruster design, which promotes hemispherical discharge chambers. Keywords-electric propulsion, radio-frequency ion thrusters, inductively coupled plasma I.