XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.最新文献_第3页

Cathodic are spots: Ignition probability as a a fundamental concept to describe spot types, phases, and motion 阴极光斑:着火概率作为描述光斑类型、相和运动的基本概念

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418628

A. Anders

引用次数: 1

Once again about a cathode spot of the vacuum arc 再一次关于真空弧的阴极点

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418651

A. Andreev

{"title":"Once again about a cathode spot of the vacuum arc","authors":"A. Andreev","doi":"10.1109/DEIV.2004.1418651","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418651","url":null,"abstract":"The movement of electrons in the neighborhood of a cathode spat cell is considered. The cell current is a pulse with a rising-up part and a descending part of about 5.10-9s time duration each. This current generates the magnetic field around the cell. During these rising-up and descending current stages, electric fields with an amplitude up to 3.5.107 V/cm are induced in the neighborhood of the cell. Thus, around the cell, near the cathode surface, the crossed fields E x B are building up which amplitudes become lower with the increase of a distance from the cell center, approximately as 1IR. Under the action of electric fields the currents become to flow along the whole perimeter of a cell current channel. These currents are in some aspect similar to halo-currents arising in the plasma of tokamak during a pulsed ohmic current. When the cell current grows, the ¿halo¿ currents are directed oppositely to the cell current, i.e. electrons are moving to the cathode and ions are accelerated to the anode. When the cell current decreases, the induced electric field causes an antoelectronic emission from the cathode surface. The emitted electrons move along cycloids in the direction to the cell center making the gas desorption and building up the near-surface plasma (aureole) around the cell. Within the framework of this model it is possible to explain qualitatively many observed experimental facts: appearance of a weak glow around the cathode spot, division of cathode spots, the spot motion in the tangential magnetic field, etc.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122537381","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

Cathode spot motion and burning voltage of low current vacuum arc with electrodes of copper-chromium composition in magnetic field 铜铬复合电极小电流真空电弧在磁场中的阴极光斑运动及燃烧电压

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418660

K. K. Zabello, Y. Barinov, A. A. Logatchev, S. Shkol’nik

{"title":"Cathode spot motion and burning voltage of low current vacuum arc with electrodes of copper-chromium composition in magnetic field","authors":"K. K. Zabello, Y. Barinov, A. A. Logatchev, S. Shkol’nik","doi":"10.1109/DEIV.2004.1418660","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418660","url":null,"abstract":"The study dealt with the cathode spot (CS) motion and the burning voltage of a low-current vacuum arc with electrodes of composition CuCr30, subjected to a magnetic field. The arcs with current 25 ≪ I ≪ 35 A burned in longitudinal (normal to the cathode surface) and transversal (tangential) fields as well as in those with the induction vector inclined by angle 5° ≪ ϕ ≪ 65° to the cathode surface. Use was made of electrodes with diameter 30 mm and gap 4 mm. The field components, longitudinal Bn, and transversal Br, varied independently in the range from 0 to 0.12T each. The superposition of the transversal magnetic field on the arc has been found to considerably increase both the constant component and noise level of the voltage. If such arc is superposed also with the longitudinal field, both the constant component and noise level decrease and at Bn ˜ Br, the voltage across the arc is weakly dependent of Br. The velocity of the retrograde (anti-Ampere) CS motion grows approximately in proportion to the growth of the transversal field induction. The proportionality factor is ˜200 m/(s.T). The increase in the longitudinal field induction causes a reduction in the magnitude of the velocity vector and its rotation with respect to the anti-Ampere direction through angle θ, its value being proportional to field inclination angle ϕ. The results obtained were compared with the data in references.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128165289","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: 4

Effects of inorganic component content on water absorbability and dielectric properties of the doped polyimide film 无机组分含量对掺杂聚酰亚胺薄膜吸水性能和介电性能的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418614

Ma Mingyan, Jinghe Zhong, Fan Yong, Zhenhao Jin

{"title":"Effects of inorganic component content on water absorbability and dielectric properties of the doped polyimide film","authors":"Ma Mingyan, Jinghe Zhong, Fan Yong, Zhenhao Jin","doi":"10.1109/DEIV.2004.1418614","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1418614","url":null,"abstract":"In this article, nano-doped polyimide/Silica (PI/SiO2) film was successfully prepared by the hydrolysis and condensation of methyl-triethoxysilane (MTEOS) that served as the precursor of the inorganic moiety and produced the nano-particle of silica in-situ in the polyamic acid (PAA) solution through sol-gel process. The chemical structure of the film was characterized by FTIR. The water absorbability and the dielectric properties including dielectric constant E and dielectric loss tg of the films were investigated with SiO2 content. And E and tg θ of the films were, further, compared heforeafter the films were immersed in deionized water for 24 hours respectively. On the other hand, a certain kind of coupling agent was added in order to improve the compatibility. It turned out that the properties of the nano-doped materials were not only relative to the inorganic component content of the system, but also to the morphology of the phases and the character of interface. The water absorbability of the films decreased with SiO2 content. And E and tg θof the films after immersed in water increased than those of the films before the immersion.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114992250","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: 0

History of the ISDEIV ISDEIV的历史

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418601

H. C. Miller

引用次数: 0

Vacuum electrical breakdown characteristics and surface chemical compositions of titanium electrodes with oxidation conditions 氧化条件下钛电极的真空电击穿特性及表面化学成分

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418606

Y. Yamano, S. Kobayashi, V. Saito

引用次数: 3

Triode model of a deep potential well in a vacuum diode 真空二极管中深势阱的三极管模型

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418609

S. Barengolts, N. Kazarinov, G. Mesyats, E. Perelshtein, V.F. Shevisov

引用次数: 0

Field evaporation of metals, alloys and compounds as a base for creation of point ion sources for nanotechnology 金属、合金和化合物的场蒸发作为纳米技术点离子源的基础

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418596

V. N. Shrednik, O. L. Golubev, M. V. Loginov

引用次数: 0

Effect of electrical conductivity anisotropy on the properties of a high-current vacuum arc

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418646

K. Arai, S. Takahashi, O. Morimiya, Y. Niwa, M. Honma

引用次数: 0

Effect of magnetic field on sustainment of low-current DC vacuum arcs 磁场对小电流直流真空电弧维持的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-09-27 DOI: 10.1109/DEIV.2004.1418655

K. Tsuruta, M. Nakajima, M. Kitaura, T. Yanagidaira

引用次数: 4