Work

Measurement of LaB6 hollow cathode emitter region temperature and plasma characteristics

Year: 2025

Type: article

Abstract: Hollow cathodes are widely used as electron sources in electric propulsion systems owing to their high electron generation efficiency. Research findings allude to the significant impact of the temperature and plasma characteristics of the emitter region of a hollow cathode, which supplies thermionic electrons, on its operation. However, these characteristics are not yet fully understood. The objective of this study is to investigate these characteristics under different orifice diameters and operating conditions. The emitter temperature increased with the discharge current for both orifice diameters. The electron density was higher downstream for larger orifice diameters. The emitter temperature was compared with the orifice temperature and was found to be lower than the latter for smaller orifices.

Source: Journal of Electric Propulsion

DOI: 10.1007/s44205-025-00115-3

Authors: Yuya Oshio, Shogo Masuyama, Hiroki Watanabe, Ikkoh Funaki

Institutions: Ryukoku University, Japan Aerospace Exploration Agency

Language: English

Topic: Plasma Diagnostics and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,490

Funder: Japan Society for the Promotion of Science