Abstract
The performance of the NASA Glenn Research Center designed and fabricated 20 kW NASA-300M thruster was evaluated. Testing was performed at power levels between 2.5 and 20 kW with xenon and krypton propellants. Testing at all power levels and discharge voltage conditions indicated that the thruster operation was stable, no anomalous behavior or thermal limitations on thruster operation were observed. Xenon propellant testing at 20 kW indicated a peak total thrust efficiency of 67% and a peak total specific impulse of 2,920 s at discharge voltages of 500 and 600 V, respectively. Krypton propellant testing revealed peak total thrust efficiency of 63% and total specific impulse of 3,223 s at a discharge voltage of 600 V.
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