XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.最新文献_第7页

Development of a vacuum arc ion source for injection of high current uranium ion beam into the unilac at GSI 真空电弧离子源在GSI向单腔腔注入大电流铀离子束的研制

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-05-18 DOI: 10.1109/DEIV.2004.1422672

R. Hollinger, M. Galonska, P. Spadtke

{"title":"Development of a vacuum arc ion source for injection of high current uranium ion beam into the unilac at GSI","authors":"R. Hollinger, M. Galonska, P. Spadtke","doi":"10.1109/DEIV.2004.1422672","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1422672","url":null,"abstract":"To fill up the GSI heavy ion synchrotron (US) to its space charge limit with uranium ions, a new vacuum arc ion source (VARIS), based on the MEVVA IV ion source has been developed and implemented into operation. The ion source has proven its capability in several long period beam times at the high current injector at GSI. With the new ion source it was possible to exceed the space charge limit of 15 mA U4+ ions at the entrance of the linear accelerator (UN1LAC)for the very first time. The reliability as well as the noise behaviour has been improved to such a degree, that this ion source can be used for injection info an accelerator without objection. In this article we present the improvements of the ion Source with the most important operational data. The emission current density of the new ion source has been increased from 60 mA/cm2 for the common used GSI-MEVVA to 170 mA/cm2. This results in a full beam ion current of 156 mA at 35 kV with a fraction of four fold charged uranium ions of 67%. The analysed U4+ ion beam after dc post acceleration amounts to 25 mA at 131 kV which is 1.7 times higher than the requested ion beam current at the entrance of the RFQ. The reduced power density of the vacuum arc results in a higher efficiency and longer life time. Solenoids which are creating magnetic fields to enhance the charge state of the ions are no more placed inside the vacuum system. This ion source design results in a higher availability after ion source replacement at the injector, and longer life time.","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":"2004-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115538490","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: 24

Measurement of total ion flux in vacuum are discharges 真空中总离子通量的测量是放电

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 2004-04-12 DOI: 10.1109/DEIV.2004.1418658

A. Anders, E. Oks, G. Yushkov, I. Brown

引用次数: 8

Influence of shield capacity on the breakdown voltade of vacuum tubes 屏蔽容量对真空管击穿电压的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422693

U. Schumann, M. Budde, M. Kurrat

{"title":"Influence of shield capacity on the breakdown voltade of vacuum tubes","authors":"U. Schumann, M. Budde, M. Kurrat","doi":"10.1109/DEIV.2004.1422693","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1422693","url":null,"abstract":"With a normal vacuum switch, shield electrodes are built into the system to control the electric field distribution. The shield electrodes thus represent an additional capacity, which is in parallel to the contact electrodes. The prediction of the high-voltage strength of such electrode arrangements in vacuum is complex. Effects of a wide range of parameters like electrode material_ surface finish: surface area, conditioning state of the surface and the geometry of the electrode arrangement exist. It is well known that the electrode's area influences the dielectric strength in vacuum. With increasing area the dielectric strength decreases, in the opposite direction the capacity of the electrode arrangement rises. This work shows that shields in a vacuum tube which represent a parallel capacity, do not alter the breakdown behaviour during lightning impulse voltage of the contact system. Since the gap distance of the shields lies clearly over that of the contact system, a reduction of the breakdown voltage is not to be expected from the increasing total surface by the ¿area effect¿. The empirical relation between the breakdown voltage and the area of the electrodes surface can also be described as a capacity influence. But the increasing capacity is not causal for the phenomenon. For this purpose. coplanar electrodes are stressed and conditioned with lightning impulse voltage (1.2/50μs). The test vessel is enabled to pick up more than one pair of electrodes. That makes possible to vary the total capacitance by a second or even third parallel connected pair of electrodes. The results of the measurements are discussed and compared to the area effect.","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127276988","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

Current status and developing trends of Cu-Cr contact materials for VCB 真空断路器用Cu-Cr触头材料的现状及发展趋势

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422608

B. Miao, Yan Zhang, Guoxun Liu

引用次数: 20

Temporal evolution of micro-plasma in a repetitive vacuum arc soft x-ray source 重复真空弧软x射线源中微等离子体的时间演化

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422675

T. Yanagidaira, W. Kotake, H. Miura, K. Tsuruta

引用次数: 0

An intelligent reactive power compensator based on synchronous vacuum circuit breaker 基于同步真空断路器的智能无功补偿器

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422619

Zou Ji-yan, Ding Fu-hua, Duan Xiong-ying

引用次数: 4

Novel plasma generation devices based on the plasma lens 基于等离子体透镜的新型等离子体产生装置

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422674

A. Goncharov, I. Brown

引用次数: 1

Study of explosive-emissive graphite cathodes in the pulsed-periodic operating regime 脉冲周期工作状态下爆发石墨阴极的研究

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422673

M. Yalandin, S. Korovin, E.A. Lilvinov, G. Mesyats, A. Murzakaev, V. Rostov, V. Shpak, S. Shunailov

引用次数: 1

Condition monitoring of vacuum circuit breakers using vibration analysis 用振动分析法监测真空断路器的状态

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422616

YonPeng Meng, S. Jia, M. Rong

引用次数: 8

Nature of late breakdowns in VI's after short circuit interruption VI短路中断后后期击穿的性质

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422645

H. Schellekens, S. Olive, K. P. Huy, P. Ndiaye, C. Pasqualini

引用次数: 2