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Study on explosive emission characteristics of the silicon carbide modified graphite cathodes with varied morphologies

Authors :
Ye Hua
Hong Wan
Ping Wu
Jun Sun
Xingyu Chen
Shuxin Bai
Jinyu Gong
Source :
AIP Advances, Vol 13, Iss 1, Pp 015122-015122-6 (2023)
Publication Year :
2023
Publisher :
AIP Publishing LLC, 2023.

Abstract

Explosive emission cathodes are extensively used in high power microwave sources. Growing requirements are highlighted in the performance of the explosive emission cathode with the development of the high power microwave technology. In order to improve the emission properties of the graphite cathode, modifications using SiC particles or whiskers are carried out by the in situ chemical vapor reaction method. The experiments demonstrate that SiC whiskers accelerate the explosive emission turn-on speed of the graphite cathode for large field enhancement factors and improve the emission uniformity due to the surface flashover plasma generation mechanism. SiC particles increase the emission capability of the graphite cathode, possibly corresponding to the dielectric properties of SiC particles. These results suggest that the SiC whiskers modified graphite cathode is suitable for applications under low magnetic field and large emission area conditions, while the SiC particles modified graphite cathode has a brighter application prospect in the long-time stable operation.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
13
Issue :
1
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.b78dbf63401845aa8ca4ac749e78f658
Document Type :
article
Full Text :
https://doi.org/10.1063/5.0131437