Effect of Working Current on C12A7 Hollow Cathode

Article Physics, Fluids & Plasmas

An experimental study on the degradation of the C12A7 hollow cathode

Zhiwei Hua et al.

Summary: This study investigates the thermionic emission mechanism of C12A7 hollow cathodes and explores the problem of overheating in the emitter. Microscopic analysis of degraded emitters reveals the melting and decomposition of the surface layer. It is found that avoiding overheating can be achieved by controlling the current density in the cathode. Additionally, xenon ion bombardment is shown to restore the emission capability in less degraded emitters.

PLASMA SCIENCE & TECHNOLOGY (2022)

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Article Materials Science, Multidisciplinary

Experimental characterization of the C12A7 hollow cathode and its joint operation with a low-power Hall thruster

Zhiwei Hua et al.

Summary: The study tested a designed C12A7 hollow cathode with a heater, successfully igniting Xe propellant with an estimated emission temperature of 1000-1100 degrees Celsius. Experimental results show comparable performance, fast ignition, and great potential in replacing traditional hollow cathodes.

VACUUM (2021)

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Article Materials Science, Multidisciplinary