This page is about exploring the potential of a Coupled Electrodynamic Tether/Electrostatic Propulsion System. A brief description of this device is as follows. A current flows through a conductive tether in orbit around a planet with a magnetic field (such as Earth). Since the current flows along an approximately straight line in one direction, the electrons need to be constantly added at one end and released at the other. This is accomplished by operating an ion thruster at one end, with its electron emitter turned off. The electrons are instead sent through the tether and emitted at the other end.
Below is the currently available material