Patent ID: 7621115

Claim:
A hall-type electric propulsion which obtains thrust through emitting generated plasma from an acceleration channel by electrostatic acceleration or electromagnetic acceleration, comprising: an electromagnetic coil for magnetizing a magnetic material to generate a magnetic field is disposed on an outer side of said acceleration channel portion; and a propellant conduit for transporting a propellant is formed such that the propellant conduit is led into a plenum chamber upstream of said acceleration channel, said propellant conduit having a form that penetrates longitudinally toward a propellant introduction port along a wall surface of said acceleration channel and turns back near the propellant introduction port, wherein said plenum chamber comprises a choke portion for increasing a velocity of said propellant and an anode that forms an electric field constitutes said choke portion, thereby simultaneously solving the problem of waste heat which worsens with micronization and the problem of discharge current oscillation.