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This paper presents the beam emission test of a triode-type Pierce gun pasted with a carbon nanotube (CNT). A DC emission current from the gridded-CNT cathode was measured to be 4.2 mA where the applied cathode voltage is -0.86 kV, grid and anode are ground, and cathode-to-grid distance is 200 mum. We also examined the mode field emission characteristics with two accelerating stages. The pulsed current...
This paper presents results of computational and experimental studies of carbon nanotube (CNT) cathodes in gridded focusing guns intended for traveling-wave tube applications. With a curved CNT cathode, a cold beam emission of 11 mA was observed in a diode configuration. Two gridded focusing cathodes pasted with CNTs were then fabricated. When the applied cathode voltage was -0.86 kV, both grid and...
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