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Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)最新文献

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Development and production of a high-power S-band MSDC klystron for satellite digital radio 卫星数字无线电用大功率s波段MSDC速调管的研制与生产
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999403
A. Shabazian, E. Wright, R. Batra, E. McCune, R. Begum, L. Zitelli
{"title":"Development and production of a high-power S-band MSDC klystron for satellite digital radio","authors":"A. Shabazian, E. Wright, R. Batra, E. McCune, R. Begum, L. Zitelli","doi":"10.1109/IVELEC.2002.999403","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999403","url":null,"abstract":"This paper describes the development and production activities of the VKS-7964M: an S-band, CW high-power, permanent-magnet (PM) focused, air-cooled, Multi-Stage Depressed Collector (MSDC) klystron amplifier for satellite communications and terrestrial broadcast applications.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128114494","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
Evaluation of aluminum nitride based RF lossy dielectrics for use in high power microwave devices 高功率微波器件用氮化铝基射频损耗介质的评价
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999247
M. Kirshner, L. Turek, E. Pekrul
{"title":"Evaluation of aluminum nitride based RF lossy dielectrics for use in high power microwave devices","authors":"M. Kirshner, L. Turek, E. Pekrul","doi":"10.1109/IVELEC.2002.999247","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999247","url":null,"abstract":"Summary form only given. For the past three years, new aluminum nitride (AlN) based ceramics have been under development to replace a hot-pressed ceramic composition made from beryllia (BeO) and silicon carbide (SiC). The BeO-SiC composite is currently the material-of-choice to provide RF loss and high thermal conductivity within the vacuum envelopes of microwave tubes. However, increasingly stringent BeO health and safety regulations and liability issues have caused qualified domestic manufacturers to cease production. Experimental evaluation of the new AlN materials in specific microwave tube configurations is being carried out. Loss buttons of the new materials are fabricated and diffusion bonded into S-band klystron cavities for cold testing. The loaded cavity Q's and frequencies are compared to those obtained with buttons made from the standard BeO-SiC composition. Materials that exhibit RF behavior similar to BeO-SiC are then selected for high-power testing at X-band to determine their suitability for use in the severe environmental conditions existing inside a high power microwave tube.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130565275","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
The RF system design for the Spallation Neutron Source 散裂中子源射频系统设计
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999368
D. Rees, P. Tallerico, W. Reass
{"title":"The RF system design for the Spallation Neutron Source","authors":"D. Rees, P. Tallerico, W. Reass","doi":"10.1109/IVELEC.2002.999368","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999368","url":null,"abstract":"Summary form only given. The Spallation Neutron Source (SNS) accelerator system includes a nominally 1000 MeV, 1.4 mA average current linac consisting of a radio frequency quadrupole (RFQ), drift tube linac (DTL), coupled cavity linac (CCL), a medium and high beta super conducting (SC) linac, and two buncher cavities for beam transport to an accumulator ring. The average proton beam power of the accelerator is 1.4 MW. Los Alamos is responsible for the RF systems for all sections of the linac. The SNS linac is a pulsed proton linac and the RF system must support a 1 msec beam pulse at up to a 60 Hz repetition rate. The RFQ and DTL utilize seven, 2.5 MW klystrons and operate at 402.5 MHz. The CCL,SC, and buncher cavities operate at 805 MHz. Six, 5 MW klystrons are utilized for the CCL and buncher cavities while eighty-one 550 kW klystrons are used for the SC cavities.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129830410","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
Assessing cathode quality in pulse and CW tubes 脉冲和连续波管阴极质量评估
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999391
S. Gold, G. Miram
{"title":"Assessing cathode quality in pulse and CW tubes","authors":"S. Gold, G. Miram","doi":"10.1109/IVELEC.2002.999391","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999391","url":null,"abstract":"Life and performance of a High Power Klystron is directly related to the quality of the cathode. The quality of the cathode can be determined using Cathode emission Activity Plots known as \"Miram Plots\" and Practical Work Function Distribution (PWFD) plots which are derived from these measurements.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130277445","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
Synthesis slow-wave structure for irregular coupled-cavity TWT with high efficiency 高效率不规则耦合腔行波管慢波结构的合成
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999280
A.V. Aksenchyk, A. A. Kurayev, A. K. Sinitsyn
{"title":"Synthesis slow-wave structure for irregular coupled-cavity TWT with high efficiency","authors":"A.V. Aksenchyk, A. A. Kurayev, A. K. Sinitsyn","doi":"10.1109/IVELEC.2002.999280","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999280","url":null,"abstract":"The synthesis algorithms for the geometric parameters of coupling slots and cavities, for irregular slow-wave structures (SWS), are indicated. For TWTs with efficiencies of more than 60%, calculated parameter results of equivalent circuit modeling of irregular slow-wave structures are represented. The described synthesis algorithms of the geometric parameters of coupling slots and cavities coincide well with the dispersion curve of a coupled resonator and corresponding equivalent circuit. Solving the corresponding nonlinear equations allows the geometric parameters to be determined.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125671757","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
High voltage commutator on the basis of an electron-beam valve (EBV) for powerful modulator 基于电子束阀(EBV)的大功率调制器高压整流子
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999358
S. Gusev, N. Matveev, V. Perevodchikov, V. Stuchenkov, V. Shapenko
{"title":"High voltage commutator on the basis of an electron-beam valve (EBV) for powerful modulator","authors":"S. Gusev, N. Matveev, V. Perevodchikov, V. Stuchenkov, V. Shapenko","doi":"10.1109/IVELEC.2002.999358","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999358","url":null,"abstract":"Creation of high-voltage modulators with pulse duration and recurrence rate varied over a wide range in connection with a problem of radar-tracking systems for satellites is discussed. The powerful high-voltage switching tube developed in VEI electron beam valve (EBV) is the optimum switching device for such a modulator. Basic EBV feature is use of a principle of energy recuperation with decelerating of an electron beam at the anode which allows one to provide low internal resistance and high electronic efficiency of a tube. Due to some design features EBV has pentode voltage-current characteristic with weak dependence of a switched current from anode voltage. The anode and accelerating grid have water cooling and allow dissipation of high power that provides EBV serviceability in a long pulse mode or in a pulse-frequency mode with high average power.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127007132","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
The relativistic TWT on the irregular waveguides with the rectangular cross-section 矩形截面不规则波导上的相对论行波管
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999303
A. A. Kurayev, A. K. Sinitsyn
{"title":"The relativistic TWT on the irregular waveguides with the rectangular cross-section","authors":"A. A. Kurayev, A. K. Sinitsyn","doi":"10.1109/IVELEC.2002.999303","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999303","url":null,"abstract":"The rigorous mathematical model of the relativistic TWT on the corrugated waveguide with rectangular cross-section is created. The variants of TWT on the coupled E/sub 11/ and HE/sub 11/-modes of a slowing structure as the doubled comb with efficiency 30-50% are presented.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"43 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113971759","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
3D FE analysis of TWT multistage depressed collectors 行波管多级压抑集热器三维有限元分析
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999364
S. Coco, Antonino Laudani
{"title":"3D FE analysis of TWT multistage depressed collectors","authors":"S. Coco, Antonino Laudani","doi":"10.1109/IVELEC.2002.999364","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999364","url":null,"abstract":"A full 3D finite-element (FE) electron-trajectory analysis of a multistage depressed collector concerning an existing magnetically focused TWT is presented. The aim of this analysis is to show the effectiveness of a 3D FE approach by comparing the obtained results with analogous ones, available from the KOBRA code. The tool used for the simulation is the COCA code.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046258","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
High efficiency frequency multiplier grid arrays for watt-level millimeter wave sources 瓦特级毫米波源的高效率倍频网格阵列
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999337
S. Rosenau, Y. Liang, C. Liang, W.-K. Zhang, C. Domier, N. Luhmann
{"title":"High efficiency frequency multiplier grid arrays for watt-level millimeter wave sources","authors":"S. Rosenau, Y. Liang, C. Liang, W.-K. Zhang, C. Domier, N. Luhmann","doi":"10.1109/IVELEC.2002.999337","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999337","url":null,"abstract":"In the millimeter wave (26-40 GHz) region, a combination of new technologies, such as MMIC amplifiers and equalizers together with miniature TWTs, have resulted in the millimeter wave power module (MMPM) which produces record power densities at low cost. These same advantages can be extended to higher frequencies by frequency multiplying the output of the MMPM using nonlinear solid state devices and quasi-optical power combining. The resulting high power millimeter wave sources offer dramatic savings in size, weight and cost as compared to conventional coupled-cavity TWT sources. A quasi-optical frequency multiplier grid array consists of thousands of varactor devices and antennas on a single wafer. This approach is extremely attractive because of its low fabrication cost, small-size realization and graceful degradation qualities. The goal of this research is a high power source using an MMPM to drive frequency multiplier grid arrays. This hybrid technology source will provide Watt-level CW output power up to 200 GHz.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121247504","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
A comparison of three-dimensional simulations of traveling-wave tube cold-test characteristics using CST MICROWAVE STUDIO and MAFIA 用CST MICROWAVE STUDIO和MAFIA进行行波管冷试验特性三维模拟的比较
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999236
C. Chevalier, K. Herrmann, C. Kory, J.D. Wilson, A. Cross
{"title":"A comparison of three-dimensional simulations of traveling-wave tube cold-test characteristics using CST MICROWAVE STUDIO and MAFIA","authors":"C. Chevalier, K. Herrmann, C. Kory, J.D. Wilson, A. Cross","doi":"10.1109/IVELEC.2002.999236","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999236","url":null,"abstract":"Previously, it was shown that MAFIA (solutions of Maxwell's equations by the Finite Integration Algorithm), a three-dimensional simulation code, can be used to produce accurate cold-test characteristics including frequency-phase dispersion, interaction impedance, and attenuation for traveling-wave tube (TWT) slow-wave structures. In an effort to improve user-friendliness and simulation time, a model was developed to compute the cold-test parameters using the electromagnetic field simulation software package CST MICROWAVE STUDIO (MWS). Cold-test parameters were calculated for several slow-wave circuits including a ferruled coupled-cavity, a folded waveguide, and a novel finned-ladder circuit using both MWS and MAFIA. Comparisons indicate that MWS provides more accurate cold-test data with significantly reduced simulation times.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114158347","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
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