"Plasma propulsion." . . "Electric propulsion." . . "Rocket thrust." . . "Pressure measurement." . . . . . . . . . . . . "High-power ion thruster technology"@en . . . . . . . . . . . . . . . . . . . . . . "Thin films." . . "Ion propulsion." . . "Charge transfer." . . "Pressure effects." . . "Ion currents." . . "Specific impulse." . .