Research on the influence of cathode surface topography on spark discharge

To obtain the relation between spark discharges and the topography of electrode surfaces, some models, such as a micro-initial model of cone and spherical head cylinder, generated from the scanning of a scanning electron microscope are introduced. Based on the principles of energy conservation and t...

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Autores principales:	Dangshu Wang, Jiaan Yi, Jianan Lou, Xuan Deng, Shulin Liu, Xinxia Wang, Zhen Dong, Yaqiang Yang
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/4a724f321f134ca89623d56b83d0fab8
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spelling	oai:doaj.org-article:4a724f321f134ca89623d56b83d0fab82021-12-01T18:52:06ZResearch on the influence of cathode surface topography on spark discharge2158-322610.1063/5.0067253https://doaj.org/article/4a724f321f134ca89623d56b83d0fab82021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0067253https://doaj.org/toc/2158-3226To obtain the relation between spark discharges and the topography of electrode surfaces, some models, such as a micro-initial model of cone and spherical head cylinder, generated from the scanning of a scanning electron microscope are introduced. Based on the principles of energy conservation and thermal equilibrium, the second-order non-homogeneous differential equation is established. The relationships between the temperature of the cathode surface and the distance from the top of micro-protrusions, the cone angle, and the radius of the ball head are derived from a set of second-order non-homogeneous differential equations. When introduced electron emission theory, the main emission type at the initial stage of the discharge is electron field emission. As the discharge progresses, the Joule heat generated by the emission current will cause thermionic emission. During this progress, the emission current density gradually increases. When the temperature of the cathode surface reaches the melting point of the cathode metal, the current density will increase sharply. Observed from the discharge, the temperature of the cathode surface is inversely proportional to the cone angle and the radius of the ball head maintains a gradually decreasing slope. It is proportional to micro-protrusions maintaining a gradually increasing slope. When the cone angle is less than 12° and the radius of the ball head is less than 0.04 µm, the temperature of the cathode surface changes more dramatically. Through this study, a further understanding of factors that affect the density of cathode current emission can be obtained, which is of great significance to improve the capacity of cathode emission.Dangshu WangJiaan YiJianan LouXuan DengShulin LiuXinxia WangZhen DongYaqiang YangAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115312-115312-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Dangshu Wang Jiaan Yi Jianan Lou Xuan Deng Shulin Liu Xinxia Wang Zhen Dong Yaqiang Yang Research on the influence of cathode surface topography on spark discharge
description	To obtain the relation between spark discharges and the topography of electrode surfaces, some models, such as a micro-initial model of cone and spherical head cylinder, generated from the scanning of a scanning electron microscope are introduced. Based on the principles of energy conservation and thermal equilibrium, the second-order non-homogeneous differential equation is established. The relationships between the temperature of the cathode surface and the distance from the top of micro-protrusions, the cone angle, and the radius of the ball head are derived from a set of second-order non-homogeneous differential equations. When introduced electron emission theory, the main emission type at the initial stage of the discharge is electron field emission. As the discharge progresses, the Joule heat generated by the emission current will cause thermionic emission. During this progress, the emission current density gradually increases. When the temperature of the cathode surface reaches the melting point of the cathode metal, the current density will increase sharply. Observed from the discharge, the temperature of the cathode surface is inversely proportional to the cone angle and the radius of the ball head maintains a gradually decreasing slope. It is proportional to micro-protrusions maintaining a gradually increasing slope. When the cone angle is less than 12° and the radius of the ball head is less than 0.04 µm, the temperature of the cathode surface changes more dramatically. Through this study, a further understanding of factors that affect the density of cathode current emission can be obtained, which is of great significance to improve the capacity of cathode emission.
format	article
author	Dangshu Wang Jiaan Yi Jianan Lou Xuan Deng Shulin Liu Xinxia Wang Zhen Dong Yaqiang Yang
author_facet	Dangshu Wang Jiaan Yi Jianan Lou Xuan Deng Shulin Liu Xinxia Wang Zhen Dong Yaqiang Yang
author_sort	Dangshu Wang
title	Research on the influence of cathode surface topography on spark discharge
title_short	Research on the influence of cathode surface topography on spark discharge
title_full	Research on the influence of cathode surface topography on spark discharge
title_fullStr	Research on the influence of cathode surface topography on spark discharge
title_full_unstemmed	Research on the influence of cathode surface topography on spark discharge
title_sort	research on the influence of cathode surface topography on spark discharge
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/4a724f321f134ca89623d56b83d0fab8
work_keys_str_mv	AT dangshuwang researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT jiaanyi researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT jiananlou researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT xuandeng researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT shulinliu researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT xinxiawang researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT zhendong researchontheinfluenceofcathodesurfacetopographyonsparkdischarge AT yaqiangyang researchontheinfluenceofcathodesurfacetopographyonsparkdischarge
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Research on the influence of cathode surface topography on spark discharge

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