Abstract
A collinear electrode plasma accelerator using either plasma derived from an exploding wire or from electrode erosion has been in operation for some time. Maximum particle velocities approaching 10/sup 7/ cm/sec and impulses of 2 x 10/sup 3/ dyne - sec were achieved. Effective specific impulses, computed from measured impulse and propellant mass, greater than 2000 sec have been obtained for the exploding wire measurements. For certain conditions of operation, the efficiency is greater than 30%. Efficiencies of 50% or more should be possible. The practicality of deriving the plasma by electrode erosion is demonstrated, and effective specific impulses of about 6000 sec are indicated. (auth)
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