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2007 IEEE International Vacuum Electronics Conference最新文献

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Reduction of magnetite in air by use of microwave heating 用微波加热还原空气中的磁铁矿
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283402
S. Takayama, G. Link, M. Thumm, A. Matsubara, M. Sato
{"title":"Reduction of magnetite in air by use of microwave heating","authors":"S. Takayama, G. Link, M. Thumm, A. Matsubara, M. Sato","doi":"10.1109/IVELEC.2007.4283402","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283402","url":null,"abstract":"Microwave technology is not a mere substitute for conventional heating, but it resides in the new domain of materials science, namely, microscopic and strong thermal non-equilibrium systems. The key factor for application of microwaves in the iron industry, is its high potential for an essential reduction of carbon dioxide emission. Iron ore refinement by means of blast furnaces was realized with the same basic furnace structure based on the same principle for two centuries. We have conducted a series of experiments to prove effectiveness of rapid and high purity refinement under low temperature and oxygen-containing environment by means of microwave application, and achieved highly positive results.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133414856","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: 5
Simulation of Coupled-Cavity TWTs with Uncertainty in Some Initial Data 初始数据不确定的耦合腔行波管仿真
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283364
A. V. Konnov, V. Petenkova, A.V. Gudovitch, D. Komarov
{"title":"Simulation of Coupled-Cavity TWTs with Uncertainty in Some Initial Data","authors":"A. V. Konnov, V. Petenkova, A.V. Gudovitch, D. Komarov","doi":"10.1109/IVELEC.2007.4283364","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283364","url":null,"abstract":"In this presentation the simulation with code DEV 5.0 of powerful coupled cavity TWT with \"cutoff\" sections in the presence of uncertainty of some initial data is discussed.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132743251","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
Recent Results in the Development of a Ka-Band Second Harmonic Gyroklystron Amplifier ka波段二次谐波回旋速调管放大器的研究进展
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283304
Pu-kun Liu, Shi-Chang Zhang, Shou-xi Xu, Yi-nong Su, Wen-Zhen Qin, F. Jin, W. Gu, Q. Xue, Z. Geng
{"title":"Recent Results in the Development of a Ka-Band Second Harmonic Gyroklystron Amplifier","authors":"Pu-kun Liu, Shi-Chang Zhang, Shou-xi Xu, Yi-nong Su, Wen-Zhen Qin, F. Jin, W. Gu, Q. Xue, Z. Geng","doi":"10.1109/IVELEC.2007.4283304","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283304","url":null,"abstract":"High-power coherent millimeter-wave sources have been extensively studied for many applications including high-resolution radars, millimeter-wave electronic counters measures, material processing, and high- energy particle accelerators. This paper presents some recent experiment results in the development of this gyroklystron at IECAS.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133131294","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: 14
Development of C-band Multi Beam Sub-booster Klystron c波段多波束次升压速调管的研制
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283242
M. Yoshida, S. Fukuda
{"title":"Development of C-band Multi Beam Sub-booster Klystron","authors":"M. Yoshida, S. Fukuda","doi":"10.1109/IVELEC.2007.4283242","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283242","url":null,"abstract":"A C-small multi beam klystron (MBK) has been under development. It is designed for the sub- booster klystron which is required to drive multiple 50 MW C-band klystrons for the SuperKEKB injector upgrade plan. The designed output power is 150 kW at the applied voltage of 25 kV which is suitable for the existing pulse modulator for the S-band sub-booster klystron. At this operating condition, the designed micro-perveances of the total and the each beamlet are 2.0 and 0.25 respectively.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134481148","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
Simulation of Interaction in Gyro-TWT with spiral waveguid 螺旋波导陀螺行波管相互作用仿真
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283319
E. Wang, Jinjun Feng, T. Yan, Mingkui Zhu
{"title":"Simulation of Interaction in Gyro-TWT with spiral waveguid","authors":"E. Wang, Jinjun Feng, T. Yan, Mingkui Zhu","doi":"10.1109/IVELEC.2007.4283319","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283319","url":null,"abstract":"The self-consistent nonlinear equations for beam-wave interaction and the equations of electronic are built up for Gyro-TWT in wave-guide with helical corrugation, numerical calculations of the equations above have been performed. The simulation results show: Among the center frequency 9.5 GHz, when the gain falls to 3dB the corresponding bandwidth is 19%.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115544500","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
Emission Properties of Metal-oxide-semiconductor Cathodes based on Nanocrystalline Silicon 基于纳米晶硅的金属氧化物半导体阴极的发射特性
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283287
H. Shimawaki, Y. Neo, H. Mimura
{"title":"Emission Properties of Metal-oxide-semiconductor Cathodes based on Nanocrystalline Silicon","authors":"H. Shimawaki, Y. Neo, H. Mimura","doi":"10.1109/IVELEC.2007.4283287","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283287","url":null,"abstract":"A metal-oxide-semiconductor cathode has been fabricated based on nanocrystalline silicon prepared by a pulsed laser ablation technique. The emission current and the transfer ratio are sensitive to the thickness of the gate electrode. Electron emission occurs at the extraction voltage as low as the work function of the top electrode. The transfer ratio is improved to 4% by reducing the thinness to 5 nm.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115607289","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
High-Current-Density Cathodes Based on Barium Hafnate with Tungsten 基于铪酸钡钨的高电流密度阴极
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283309
A. Taran, S. Plankovskyy, E. Ostrovsky, S. Ordanjan
{"title":"High-Current-Density Cathodes Based on Barium Hafnate with Tungsten","authors":"A. Taran, S. Plankovskyy, E. Ostrovsky, S. Ordanjan","doi":"10.1109/IVELEC.2007.4283309","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283309","url":null,"abstract":"Method of obtaining hot-pressed composed cathodes based on barium hafnate with tungsten with different percentage of components and experimental results of thermoemission properties investigations of these cathodes are represented. It is shown that cathodes of 63 mass% BaHfO3 + 37 mass% W is most effective one. It allows to obtain the thermoemission current density 230 A/cm2 at 2000 K. Evaporation rate of emission active components for cathode with 37 mass % W at T = 1900 K equals to G = (5plusmn2)-10-6 kg/(m2-s).","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124550609","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: 3
Improved Magnetron Injection Guns for Gyrotrons 用于回旋管的改进磁控管注射枪
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283211
L. Ives, D. Marsden, G. Miram, K. Gunther, M. Curtis
{"title":"Improved Magnetron Injection Guns for Gyrotrons","authors":"L. Ives, D. Marsden, G. Miram, K. Gunther, M. Curtis","doi":"10.1109/IVELEC.2007.4283211","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283211","url":null,"abstract":"Calabazas Creek Research, Inc. is continuing research to improve the quality of magnetron injection guns for gyrotrons. As a result, recent guns demonstrated significantly improved performance. The latest developments to improve the performance while simultaneously reducing the cost is presented","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114585056","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: 3
Development and Operation of a 650 GHz Folded Waveguide Source 650 GHz折叠波导源的研制与运行
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283295
J. Tucek, K. Kreischer, D. Gallagher, R. Vogel, R. Mihailovich
{"title":"Development and Operation of a 650 GHz Folded Waveguide Source","authors":"J. Tucek, K. Kreischer, D. Gallagher, R. Vogel, R. Mihailovich","doi":"10.1109/IVELEC.2007.4283295","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283295","url":null,"abstract":"Northrop Grumman Corp. has fabricated and demonstrated a vacuum electronic (VE) device based on a folded waveguide (FWG) circuit which operates between 600 and 675 GHz. Output powers up to 16 mW at duty cycles up to 1% and a source efficiency of 0.08% have been demonstrated. Development continues toward increasing the source efficiency by improving beam transmission and incorporating a depressed collector to recover a significant fraction of the spent beam energy.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114979641","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
Application-Specific Multi-Parameter TWT Optimization 特定应用的多参数行波管优化
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283388
D. Whaley, L. Behnke, J. Mckay
{"title":"Application-Specific Multi-Parameter TWT Optimization","authors":"D. Whaley, L. Behnke, J. Mckay","doi":"10.1109/IVELEC.2007.4283388","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283388","url":null,"abstract":"During the TWT design process, application- specific requirements often define the goals of a TWT development program. These requirements may be germane to most platforms but more often are unique to the given application under consideration. In addition, the performance goals are often conflicting, making the design process more challenging and the balance between the conflicting requirements more subjective than quantitative. Here we consider an example of such a TWT development, where stringent requirements are imposed due to the end-user's application and platform and where a design methodology was developed to accommodate the multiple goals of the program. Experimental results from the resulting TWT prototype demonstrate the viability of the approach.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123966226","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
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