|Table of Contents|

Experimental study of spectrum analysis on discharge oscillation for hollow cathode(PDF)

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

Issue:
2021年03期
Page:
83-89
Research Field:
研究与设计
Publishing date:

Info

Title:
Experimental study of spectrum analysis on discharge oscillation for hollow cathode
Author(s):
FENG Jie; ZHAO Yong; WANG Shangmin; LIU Chao; YUE Shichao; JIA Yanhui
Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China
Keywords:
hollow cathode;  discharge oscillation;  spectrum analysis;  FFT
PACS:
TG146.1
DOI:
-
Abstract:
At present,the large-batch module-level performance test for hollow cathodes mostly adopts metal anode structure,which is different from the situation that the hollow cathode uses positive ion beam as the anode in actual work.In order to verify the difference in the discharge characteristics of the hollow cathode when the metal electrode and the positive ion beam are used as the anode,a comparative experiment was designed,and the discharge characteristics,oscillation characteristics and frequency characteristics of the hollow cathode were analyzed in two cases.The test results and FFT analysis show that when the positive ion beam was used as the anode,the cathode will have multiple relevant frequency components between 2 MHz and 12 MHz; when the metal anode was used,the discharge stability of the hollow cathode is closely related to the gas flow.When the air flow is greater than the plume mode switching threshold,FFT analysis does not find the relevant spectral components.When the air supply flow is less than the switching threshold,the discharge voltage will have an oscillating component at 17 MHz.Increasing the air supply flow can effectively eliminate this component.The research results provide a theoretical basis for the improvement of the hollow cathode screening test.

References:

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