Figure 6

Sample variation of the axial thrust with the height above the propeller at − 98 kV for a RIE with toroidal collector. Error bars are 3 mm height positioning error and 5% estimated measurement thrust error.

Sample variation of the axial thrust with the height above the propeller at − 98 kV for a RIE with toroidal collector. Error bars are 3 mm height positioning error and 5% estimated measurement thrust error.