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These electrons can be provided from a hot cathode filament and when accelerated in the electrical field of the cathode, fall to the anode ( Kaufman type ion thruster ).

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Promote Demote Fragment Fix

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These electrons can be provided from a hot cathode filament and accelerated in the electrical field of the cathode fall to the anode ( Kaufman type ion thruster ).

Edit
Promote Demote Fragment Fix

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