Method and system for inferring electron temperature from hollow cathode plume color

Abstract

The present application provides a method and system for inferring an electron temperature from a hollow cathode plume color, applicable to diagnosis and inference of the electron temperature distribution of the hollow cathode under in-orbit or other vacuum environments. The method includes extraction of plume color data of the hollow cathode, two-dimensional processing of the plume color data, establishment of a correlation database between gridded colors and electron temperatures, and inference of the electron temperature distribution using the gridded colors. The inferred data of the electron temperature obtained in the present application exhibits trends consistent with measurement data obtained using a Langmuir probe, with diagnostic deviations within 30%. Based on the present application, researchers can directly leverage hollow cathode plume images to perform rapid, non-contact diagnosis of the electron temperature distribution characteristics.

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