The VASMIR (Variable Specific Impulse Magnetoplasma Rocket) engine of three linked magnetic cells. The first heats the atoms of a neutral gas such as argon with a radio frequency generator creating plasma.

The second stage acts as an amplifier, further energizing the plasma using electromagnetic waves. The plasma reaches about a million degrees, comparable to the center of the sun.

The third and final stage is a “magnetic nozzle” that converts the energy of this superheated plasma into directed motion and, ultimately, high velocity thrust.