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In our proposed method of the completely electrodeless electric propulsion system, a high-density (∼ 1013 cm−3) helicon plasma is accelerated by the Lorentz force, i.e., the product of the azimuthal current jθ and the radial component of magnetic field Br. In order to promote the plasma acceleration scheme, we used permanent magnets (PMs) designed to increase Br in comparison to the present electromagnets (EMs). As an initial try of the plasma acceleration by our system, electron density ne and ion velocity vi of generated plasma using PMs’ magnetic field were measured, and we have obtained the maximum value of ne = 2.5× 1012 cm−3 and vi = 2.2 km/s. In addition, we have also introduced a combined, flexible operation of using PMs and EMs leading to better plasma performance.

Generation and Acceleration of High-Density Helicon Plasma Using Permanent Magnets for the Completely Electrodeless Propulsion System