The HDLT has two main advantages over most other ion thruster designs; first, it creates an accelerating electric field without inserting unreliable components like high voltage grids into the plasma (the only plasma-facing component is the robust plasma vessel). Secondly, a "neutralizer" isn't needed, since there are equal numbers of electrons and (singly charged) positive ions emitted. So, with neither moving mechanical parts nor susceptibility to erosion, Dr Charles explains, 'As long as you provide the power and the propellant you can go forever.'