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Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)最新文献

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Coaxial cold-cathode magnetron 同轴冷阴极磁控管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-07-11 DOI: 10.1109/IVNC.2004.1354953
V. Yeryomka, V. Dzyuba
{"title":"Coaxial cold-cathode magnetron","authors":"V. Yeryomka, V. Dzyuba","doi":"10.1109/IVNC.2004.1354953","DOIUrl":"https://doi.org/10.1109/IVNC.2004.1354953","url":null,"abstract":"The key features of the cold-cathode magnetrons whose secondary-emission current is produced by primary-electron bombardment from the autoelectronic emitter are embodied in: a) the make up and technological aspects of the cathode assembly; b) pumping process; c) training of devices; d) the criteria of the emission evaluation parameter; e) reliability; f) a long life expectancy. In the present report special attention is focused on peculiar ways of obtaining the operating current from the magnetron's cold cathode.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122848296","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
Sources of temperature variance in dispenser cathodes 分配器阴极温度变化的来源
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316328
S. Roberts
{"title":"Sources of temperature variance in dispenser cathodes","authors":"S. Roberts","doi":"10.1109/IVELEC.2004.1316328","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316328","url":null,"abstract":"Summary form only given. Typical temperature specifications for dispenser cathodes range from 950/spl deg/Cb to 1100/spl deg/Cb with 1 to 2 percent tolerance. With current techniques, tolerance and repeatability of measurements are impacted by variables in construction materials, material surface conditions, test equipment and arrangements, and temperature measurement when dispenser cathodes are vacuum thermal tested. Dispenser cathodes are constructed from various refractory metals and oxide materials which present certain unique properties and associated unique uncertainties. This paper discusses the manufacturing processes and materials contributing to these temperature variables, including emitter surface conditions, surface finish variability on the cathode body and heat shields, heater wire resistance, potting density, and temperature measurement error. The data includes sample sets of cathode test data demonstrating the cumulative effects of the variables, error factors, and specific parameters evaluated in the paper.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115165048","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
IOTs step into L-band: 20 kW CW at 1.3 GHz 物联网进入l波段:1.3 GHz的20 kW连续波
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316348
Yanxia Li, H. Bohlen, E. Davies, P. Krzemiński, B. Tornoe
{"title":"IOTs step into L-band: 20 kW CW at 1.3 GHz","authors":"Yanxia Li, H. Bohlen, E. Davies, P. Krzemiński, B. Tornoe","doi":"10.1109/IVELEC.2004.1316348","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316348","url":null,"abstract":"IOTs have been broadly used in the UHF range for broadcast, science and industrial applications. It was initially thought that IOTs would not be able to maintain their well-appreciated properties, such as efficiency and linearity, while operating at frequencies above 1 GHz due to the transit time limit. However, since a growing number of particle accelerators requests 1.3 GHz amplifiers as RF power sources, an investigation was conducted to determine the possibility of manufacturing L-band IOTs. Detailed operating parameters of prototype and beta version will be presented in the paper.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123163150","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
Novel TWT interaction circuits for high frequency applications 新型高频行波管交互电路
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316193
C. Kory, L. Ives, M. Read, P. Phillips, J. Booske, S. Bhattacharjee, J. Welter, M. Genack, H. Jiang, D. W. van der Weide, S. Limbach, P. Borchard
{"title":"Novel TWT interaction circuits for high frequency applications","authors":"C. Kory, L. Ives, M. Read, P. Phillips, J. Booske, S. Bhattacharjee, J. Welter, M. Genack, H. Jiang, D. W. van der Weide, S. Limbach, P. Borchard","doi":"10.1109/IVELEC.2004.1316193","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316193","url":null,"abstract":"Summary form only given. The initial focus of this program is on the development of Ka-band TWTs producing 10 W of RF power. These devices would potentially be used as RF sources for phased array antennas. This requires innovative TWT designs, which result in improved repeatability, increased yield and reliability, and reduced cost over existing Ka-band devices. To do this, the batch nature of micro-electro-mechanical systems (MEMS) fabrication techniques is ideal. However, many TWT interaction circuits, such as the conventional helix, are not compatible with MEMS techniques. Thus, Calabazas Creek Research, Inc. (CCR) has computationally investigated several innovative TWT interaction circuits based on MEMS fabrication. These include the square helix, planar helix and modified folded waveguide circuits.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129002613","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: 21
Output analysis of a coaxial virtual cathode oscillator [vircator] 同轴虚阴极振荡器[vircator]输出分析
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316262
Ming-Chieh Lin, Kuo-Hua Huang
{"title":"Output analysis of a coaxial virtual cathode oscillator [vircator]","authors":"Ming-Chieh Lin, Kuo-Hua Huang","doi":"10.1109/IVELEC.2004.1316262","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316262","url":null,"abstract":"Summary form only given. In this work, a coaxial virtual cathode oscillator (vircator) has been investigated. Horn antennas are widely used in the output of high power microwave tubes. The output characteristics of a vircator circular horn antenna with TM mode operations are studied. A 3D model has been constructed using the finite-element code, HFSS, and the numerical results have been carried out after time consuming simulations. The calculated far-field patterns of TE/sub 11/ and TM/sub 01/ modes for the vircator output are presented.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129118878","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
Reflex klystron using photonic crystal 光子晶体反射速调管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316229
S. Jeon, Y. Shin, J.I. Kim, S.T. Han, K. Jang, J. So, G. Park
{"title":"Reflex klystron using photonic crystal","authors":"S. Jeon, Y. Shin, J.I. Kim, S.T. Han, K. Jang, J. So, G. Park","doi":"10.1109/IVELEC.2004.1316229","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316229","url":null,"abstract":"In this paper, we propose a potential application of the photonic crystals. Just like the demonstrated high order TE mode operation, a high order TM/sub mno/ mode in a rectangular cavity can be also dominantly interacted with a linear electron beam by using the PBG effect. In other words, the exclusion of the fundamental mode and some low order modes by using the PBG of the photonic crystals can make the high order TM/sub mno/ mode be dominant in the photonic crystal cavity.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130094480","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
X-ray tubes incorporating carbon nanotube cathodes 采用碳纳米管阴极的x射线管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316300
R. Espinosa, C. Mckenzie, M. Munson, S. Snyder, D. Blake, L. Delzeit, P. Sarrazin
{"title":"X-ray tubes incorporating carbon nanotube cathodes","authors":"R. Espinosa, C. Mckenzie, M. Munson, S. Snyder, D. Blake, L. Delzeit, P. Sarrazin","doi":"10.1109/IVELEC.2004.1316300","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316300","url":null,"abstract":"Oxford Instruments is currently producing tubes with CNT (carbon nanotube) cathodes for compact X-ray sources such as the 30 kV, 12.2 in/sup 3/ (16.4 cm/sup 3/) source. This paper provides information on the emission stability, leakage current and reproducibility of the X-ray tubes, and the effects cathode performance has on the tubes. We will also include data from an analyzer that was constructed to measure the angular divergence of the emission from these particular CNT cathodes. These data indicate that the half-angle dispersion of electrons emitted into a uniform electric field is approximately 3/spl deg/.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134380130","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
Linearized TWTAs for satellite application 卫星应用的线性化twta
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316257
D. S. Komm, R. Liou, J. Pyter
{"title":"Linearized TWTAs for satellite application","authors":"D. S. Komm, R. Liou, J. Pyter","doi":"10.1109/IVELEC.2004.1316257","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316257","url":null,"abstract":"Summary form only given. Boeing Electron Dynamic Devices, Inc has developed a full line of linearized TWTAs (LTWTAs)for use on communication satellites. The linearizer is designed to produce gain expansion and phase advance as maximum TWTA output power is approached and thus counteract the non-linearities of the TWTA. These LTWTAs cover the full frequency range from S-band through K-band. This paper discusses the effects of linearization upon the various RF performance parameters of the LTWTA such as AM/PM conversion, intermodulation distortion, noise power ratio, etc., as well as the effects upon the overall communication system, and how spacecraft designers can best avail themselves of these new devices. Additionally, future trends in both TWT and EPC designs are suggested.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129404899","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
Analysis of mode competition in magnetrons 磁控管模式竞争分析
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316287
G. Churyumov, T. Frolova, A. Gritsunov, O. Nikitenko, V.A. Prokopchik
{"title":"Analysis of mode competition in magnetrons","authors":"G. Churyumov, T. Frolova, A. Gritsunov, O. Nikitenko, V.A. Prokopchik","doi":"10.1109/IVELEC.2004.1316287","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316287","url":null,"abstract":"Summary form only given. The understanding of a competition problem between difference modes in magnetrons it is important for improving the parameters and operations of given tubes. In this paper, the analysis of mode competition taking place in the interaction space of an oven magnetron is presented. To do this, computer modeling of the electron-wave interaction was carried out by the particle-in-cell (PIC) method, including a spectral approach that permits us to study the excitation mechanism of unwanted modes in a wide frequency range. Computer modeling of the electron-wave interaction is carried out in 2D approximation and takes into account all the interaction space of the magnetron (multi-periodical model). The obtained results connected with the computer modeling of the mode competition in magnetrons allow us to make clear the physical mechanism and features of this phenomena.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132137649","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
Cusp gun Ka-band second-harmonic TE/sub 21/ gyro-TWT amplifier 尖枪ka波段二次谐波TE/sub - 21/陀螺-行波管放大器
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316267
S. Harriet, D. Mcdermott, N. Luhmann
{"title":"Cusp gun Ka-band second-harmonic TE/sub 21/ gyro-TWT amplifier","authors":"S. Harriet, D. Mcdermott, N. Luhmann","doi":"10.1109/IVELEC.2004.1316267","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316267","url":null,"abstract":"A second-harmonic TE/sub 21/ gyro-TWT is being constructed at UCD that is predicted to produce 50 kW in Ka-band with 20% efficiency, 30 dB saturated gain and 3% bandwidth. The device is driven by a 70 kV, 3.5 A axis-encircling electron beam from a novel Northrop Grumman cusp gun.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131676486","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
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