Figure 7
(a) Maximum RIE axial thrust dependance on the propeller axial height above the toroidal counter electrode at various voltages. Error bars are 3 mm height positioning error and 5% estimated measurement thrust error. (b) Variation of the axial thrust per cm height for a 20 kV increase in the applied voltage and positioning of the propeller above toroid at the optimal height (maximum thrust for the applied voltage).
