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EPJ Techniques and Instrumentation
Fig. 9 | EPJ Techniques and Instrumentation

Fig. 9

From: Global models for radio-frequency ion thrusters

Fig. 9

a) Experimentally determined performance-mapping for a screen grid current of 30mA and determined coil current of the RIT-4. The voltages applied to the grids are 1200V to the gas inlet of the thruster, thus biasing the screen grid by the same voltage, and −150V to the acceleration grid. The required input power of the RFG is represented by filled squares, while the root mean square of the coil current is represented by filled circles. b) Efficiency of the RIT-4. The mass efficiency is depicted by open square, the electrical efficiency by open circles

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