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

Effect of pressure on the behavior of cathode spots in oxide removal by are discharge 压力对放电除氧化物阴极斑点行为的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2006-02-15 DOI: 10.2355/ISIJINTERNATIONAL.46.335

H. Takahashi, T. Nakamura, M. Sugimoto, K. Takeda, M. Usio, M. Tanaka

{"title":"Effect of pressure on the behavior of cathode spots in oxide removal by are discharge","authors":"H. Takahashi, T. Nakamura, M. Sugimoto, K. Takeda, M. Usio, M. Tanaka","doi":"10.2355/ISIJINTERNATIONAL.46.335","DOIUrl":"https://doi.org/10.2355/ISIJINTERNATIONAL.46.335","url":null,"abstract":"The cathode spots of a vacuum arc have smart properties such as preferential attack against oxides and their selective removal. Recently cathode spots have been used for cleaning metal surface before the application of coating or prior to surface modification. The effects of pressure on the cleaning action of the cathode spots were investigated in a wide pressure range from 10 to 2000 Pa of insert atmosphere. Experiments were carried out by using hot rolled steel plates, the surfaces of which were covered with thick oxide of 5-10 μm. Experimental observation revealed the following results: (1) The vacuum arc phenomenon of cathode spots is confirmed even under a pressure as high as 20000 Pa. (2) The number of cathode spots on the oxide surface increased with the increase of pressure in the range of 10 ˜2000 Pa. (3) The removal rate of oxide decreased with the increase of pressure. AI pressures higher than 10000 Pa, the cleaning action (oxide removal) by the cathode spots was only negligibly observed. (4) The cathode spot energy density may possibly decrease with an increase in pressure. (5) The higher the pressure increase, the smaller area the movement of the cathode spots was restricted to. The cleaning area decreased with the increase of pressure.","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":"2006-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115587160","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: 13

Flashover voltage of alumina ceramic contaminated by metal vapor in vacuum interrupters 真空灭弧器中被金属蒸气污染的氧化铝陶瓷的闪络电压

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2006-02-13 DOI: 10.1109/TDEI.2006.1593399

S. Sato, H. Koga

引用次数: 4

Discharges with the evaporation of anode substance in vacuum 负极物质在真空中蒸发放电

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418635

V. Saenko, A. Borisenko

引用次数: 0

Optimal conditions efficiency for pulse increasing the breakdown strength of vacuum insulation 脉冲提高真空绝缘击穿强度的最佳条件和效率

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418586

A. Emelyanov, E. Emelyanova, T. Safonova, I. Serikov

引用次数: 1

Secondary electron emission of dielectric materials under high emperature condition 高温条件下介电材料的二次电子发射

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418590

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

引用次数: 3

Voltage breakdown and formation film discharge along a surface of a water jet 沿水射流表面的电压击穿和形成膜放电

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418621

E. Azizov, A. Emelyanov, V. Yagnov

{"title":"Voltage breakdown and formation film discharge along a surface of a water jet","authors":"E. Azizov, A. Emelyanov, V. Yagnov","doi":"10.1109/DEIV.2004.1418621","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418621","url":null,"abstract":"Abslracf It is known, that alongside with vacuum lighting protectors large throughput capacity on a current have the dischargers operating a sliding creeping discharge of dielectric medium. I n tendered activity the voltage breakdown and formation of turn electric discharge in a zone of tenacious turbulent stirring of a buoyant jet of water driving in a direction crosswise of an axis of an clcctrode system is studied. The border zone of a spray actually represents biphasic medium with concentration microbubbles of a cavitation parentage of up to 107 cm-3, therefore in her there are favourable conditions for a breeding o f electrons. By it the considwed breakdown essentially differs from a low-voltage breakdown in a reposing liquid. Tlie abnormal properties of electric discharge in a buoyant jet show both at the stage of ignition, and at sustained combustion. So the threshold voltages of a breakdown are reduced in some times already at speeds of a spray 30 mis, simultaneously approximately duration o f the prebreakdown stage i s reduced to one two order. At arc stage of combustion discharge there is a developed emitting surface, a depth of a plasma sheath about I mm. The change on","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":"132579344","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

Electrode area of breakdown depending on conditioning mechanism under non-uniform electric field in vacuum 真空非均匀电场作用下电极击穿面积与调节机制有关

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418605

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

引用次数: 10

Vacuum breakdown cathode initiation estimation in pulse regime 脉冲状态下真空击穿阴极起爆估计

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418588

A. Emelyanov, E. Emelyanova, T. Safonova, I. Serikov

引用次数: 1

Temporal structure of the fast electron beam at the stage of formation of the pseudospark discharge with external triggering 外触发伪火花放电形成阶段快速电子束的时间结构

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418665

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

引用次数: 1

Effect of in situ heat treatment on surface flashover characteristic and surface condition of alumina in vacuum 原位热处理对真空氧化铝表面闪络特性和表面状态的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418618

Y. Tsukamoto, Y. Yamano, S. Kobayashi, Y. Saito

{"title":"Effect of in situ heat treatment on surface flashover characteristic and surface condition of alumina in vacuum","authors":"Y. Tsukamoto, Y. Yamano, S. Kobayashi, Y. Saito","doi":"10.1109/DEIV.2004.1418618","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418618","url":null,"abstract":"Flashover along the surface of a solid insulator (surface flashover) prevents minimizing the size of vacuum devices It has been considered that the emission ofelectrons from the cathode hiple junction won is the first step of initiating the surface flashover, subsequent gas desorption from insulator surface stimulated by elechon impact is the second stop and finally the surface flashover occurs in the desorbed gases In addition it has been recognized that conditioning treatment by repetitive surface flashover cleans insulator surface and brings higher flashover voltage. Therefore removal of adsorbed gas= and surface contaminants may improve surface flashover voltage. In this expetiment, vacuum heat treatment (about 465 degrees Celsius) for Alumina samples was employed as a means of removal of adsorbed gases and surface contaminants. AAer heat treatment, repetitive flashover test was conducted in vacuum without the expsure.of sample to atmosphere Flashover voltages with and without heat treatment were compared. As a mull, flashover voltage for the sample with heat treatment was higher than that for without heat treatment In particular, an appreciable improvement of first flashover voltage was confirmed for heat treatment samples significant conditioning eNwt for the sample with heat treatment was obtained as well. In addition the dependence of the flashover voltage on the purity of aluminas with heat treatment was clalified.","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":"126943495","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: 7