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Experimental investigation for discharge plasma properties of BaW hollow cathode(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2014年05期
Page:
55-60
Research Field:
研究与设计
Publishing date:

Info

Title:
Experimental investigation for discharge plasma properties of BaW hollow cathode
Author(s):
ZHANG Yan;  KANG Xiao-lu;  QIAO Cai-xia
Shanghai Institute of Space Propulsion, Shanghai 201112, China
Keywords:
-
PACS:
V439+.2-34
DOI:
-
Abstract:
As a key part of electric thruster, its hollow cathode discharge plasma properties decide its performance and reliability. In the experiments, a Langmuir Probe was placed at the BaW hollow cathode orifice to diagnose and analyze the variation of discharge plasma properties at the BaW hollow cathode orifice with the propellant flow and discharge current. The experiment results show that the propellant flow and discharge current have an obvious effect on discharge plasma properties, and each plasma parameter has an obvious change with the propellant flow and discharge current. Concretely speaking, the electron density increases with the increase of propellant flow and discharge current, the plasma potential decreases with the increase of propellant flow and discharge current, and the electron temperature reduces with the increase of propellant flow but increases a little bit

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