Abstract
The Electron Cyclotron Resonance (ECR) plasma thruster is an electric propulsion device that combines the high ionization performances of an ECR source and the simultaneous acceleration of electrons and ions in a magnetic nozzle. A coaxial ECR thruster under development at ONERA is tested using xenon as the propellant gas. The influence of mass flow rate and microwave power on ion current and ion energy distribution is evaluated. Mass utilization efficency up to 45% and ion energy up to 350 eV have been obtained with a microwave power around 50 W.
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