Abstract
The plasma ion loss to the discharge chamber wall in a magnetic cusp ion thruster has a significant influence on the discharge performance expressed in terms of ion production cost and propellant utilization efficiency. A method is presented for improving discharge performance by confining the ions electrostatically in the discharge chamber; a set of ring-shaped electrodes that is biased positively with respect to the anode is installed in the regions enclosed by the cusp fields. 6 references.
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