Long distance transportation using electromagnetic engines

Electromagnetic engines carry a cylindrical ring. Propellant is injected into this cylinder. Radiofrequency waves are used to create plasma state for the propellants and the plasma state thus achieved is well managed and controlled by some special magnets. These special magnets are capable of producing diverging axial magnetic field. At plasma state, propellant particles interact to create more energy which then is converted into thrust. Since electrodes and grids are not present in this type of electromagnetic engines, very high velocity generation is possible. Due to this very high velocities, life span increases which is a positive sign for propulsion for deep space missions. This technique already tried by NASA at their Marshall space flight centre.