XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.最新文献_第5页

Effect of natural surface roughness on electron emission from metal in electric field 天然表面粗糙度对电场作用下金属电子发射的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418589

V. Choulkov

{"title":"Effect of natural surface roughness on electron emission from metal in electric field","authors":"V. Choulkov","doi":"10.1109/DEIV.2004.1418589","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418589","url":null,"abstract":"The existence of electron emission at fields some hundreds of times smaller than expected theoretically for an ideal metal surface one explains by emission increase due to local field enhancement at the sharp metallic point protruding from cathode surface. This paper offers a new mechanism explaining anomalous field emission by effect of natural rughness of crystal face of metal surface with atomic sizes (10-8-10-7 cm). It is shown that natural roughness with size about a few period of crystal lattice leads to production of emission sites where work function is significantly less thin work function at a perfectly smooth surface. The Richardson- Dashman thermo-field emission theory with Schottky correction is used for the calculations of current density at the sites. The electrical field change is evoked by natural roughness of crystal face is taken into account. An estimate of emission current in term of emission sites is performed. Then density of emission Sites on metal surface is computed by using the Statistical theory. Total emission current is determined as current averaged over emission sites distribution on metal surface. It is shown that the thermo-field electron emission from such sites play most important role in total emission at average electric field strength on surface 105-106V/cm.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131494481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Influence of alumina characteristics on charging mechanism in vacuum 氧化铝特性对真空充装机理的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418617

K. Usui, Y. Taniguchi, H. Okubo

引用次数: 3

Prebreakdown current dependency on size and configuration of electrode pores 预击穿电流依赖于电极孔的大小和结构

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418593

N. V. Tatarinova, A. Baryshnikov

{"title":"Prebreakdown current dependency on size and configuration of electrode pores","authors":"N. V. Tatarinova, A. Baryshnikov","doi":"10.1109/DEIV.2004.1418593","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418593","url":null,"abstract":"Studies of processes in pores of electrode surface were defined by two problems: 1) to suppress these processes in order to increase electrical strength of vacuum gap [1]; 2) to develop charged particle source with cold cathode based on these processes [2]. From the above references follows that at electrical field \"strength values achieved in contemporary high voltage electron vacuum devices and electrophysical facilities prebreakdown currents, microdischarges and vacuum breakdown are defined by processes in micropores of electrodes (or the like defects). These processes are nothing but various stages of self-sustaining gas discharge development the final one being formation of cathode part over the surface of the pore. Voltage-current characteristics (VCCs) of prebreakdown currents attributed to processes in pores include linear and exponential parts. Line-to-exponent transition is defined, first of all, by vacuum, gap width and pore size, i.e., by degree of sagging of electrical field into the pore volume. More precisely, electrical field pattern depends on pore geometrical size relation, pore-depth-to-vacuum-gap-width ratio. To the greater extent this dependence is observed pore size being close to vacuum gap width. Pore configuration variation for the same pore size on electrode plane also defines voltage-current characteristics' exponential part appearance, i.e., vacuum gap breakdown. Creating special porous surface one can vary the electrical strength of vacuum insulation.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124890520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Secondary electron emission and surface charging from alumina at high temperature 氧化铝在高温下的二次电子发射和表面充电

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418598

S. Michizono, Y. Saito, Suharyanto, Y. Yamano, S. Kobayashi

引用次数: 3

Effect of electrode surface roughness on breakdown conditioning process under non-uniform electric field in vacuum 真空非均匀电场条件下电极表面粗糙度对击穿调理过程的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418604

Y. Inagawa, F. Miyazaki, K. Kato, M. Sakaki, H. Ichikawa, H. Okubol

引用次数: 2

High-speed observations of arc modes on RMF- and AMF- contacts RMF-和AMF-触点上电弧模式的高速观测

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418654

D. Gentsch, W. Shang

引用次数: 5

Numerical analysis of the external insulation of outdoor vacuum circuit breaker under lightning impulse voltage 雷击电压作用下室外真空断路器外绝缘的数值分析

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418616

Gao Youhua, Wang Er-zhi, Liu Yanbin, Cao Yundong

引用次数: 0

Current quenching in the pseudospark discharge and generation of a fast electron beam 赝火花放电中的电流猝灭及快速电子束的产生

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418664

Y. Korolev, O. B. Frants, V. G. Geyman, R. V. Ivashov, N. Landl, I. A. Shemyakin, R. Bischoff, K. Frank, I. Petzenhauser

引用次数: 1

Effect of the anode-spattered atom stream on the current flow in the vacuum arc 阳极溅射原子流对真空电弧电流的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418632

J. Londer, K. Ulyanov

引用次数: 0

The influence of the surface structure on the behavior of arc cathode spots in vacuum 真空中表面结构对电弧阴极斑点行为的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418627

B. Juettner

引用次数: 1