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

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Radar transmitter upgrades 雷达发射机升级
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316314
M. Kempkes, P. Brown, J. Casey, M. Gaudreau
{"title":"Radar transmitter upgrades","authors":"M. Kempkes, P. Brown, J. Casey, M. Gaudreau","doi":"10.1109/IVELEC.2004.1316314","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316314","url":null,"abstract":"This paper summarizes DTI's work in developing components for several different radar transmitter upgrades. The systems discussed include the AN/SPS-49 long range air surveillance radar, the Cobra Judy X-band systems, and the AN/SPQ-9A radar. The new technology is a viable and cost-effective replacement for obsolete components. Further, it improves the reliability of the transmitter and delivers better protection to the RF amplifier (klystron, TWT, etc.).","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"99 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":"132978855","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
Highly tunable high average power UHF magnetron 高可调谐高平均功率超高频磁控管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316254
R.S. Smith, L. Ludeking, D. Hobbs, T. Gray, T. Wynn, R. Lentz
{"title":"Highly tunable high average power UHF magnetron","authors":"R.S. Smith, L. Ludeking, D. Hobbs, T. Gray, T. Wynn, R. Lentz","doi":"10.1109/IVELEC.2004.1316254","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316254","url":null,"abstract":"Summary form only given. High average power magnetrons operating in the vicinity of 915 MHz have long been used in many industrial heating applications, and have recently been considered for various military applications. Some of these applications, including cases where it is required to drive resonances, require that the magnetrons be tunable. Based upon results from a previous CTL prototype which attained moderate tunability, MRC has designed an improved tuning mechanism which achieves a tuning range approaching 8.5% and, unlike the original tube, is expected to achieve this tuning range at the 250 kW peak power level.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"35 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":"129174479","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 6.7 GHz, TM/sub 040/ triple-beam monotron 6.7 GHz, TM/sub 040/三波束单控管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316336
J. Barroso
{"title":"A 6.7 GHz, TM/sub 040/ triple-beam monotron","authors":"J. Barroso","doi":"10.1109/IVELEC.2004.1316336","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316336","url":null,"abstract":"Since a monotron does not require an externally-applied magnetic field, the system comprises a simple structure where the elementary functions of electron bunching and energy transfer to the RF field are performed in a single circular cylindrical cavity, which makes the monotron a compact, lightweight device. Exploring the monotron concept, the present paper describes a triple-beam TM/sub 040/, 6.7 GHz monotron where each beam is injected into the resonant cavity at 80 A current and 10 keV energy. At this injection energy, a maximal conversion efficiency of 18.5 % is predicted for optimum cavity dimensions. To verify the efficiency predicted by 1D theory, as well as to examine the viability of a triple-beam TM/sub 040/ monotron as a high-power microwave source, a particle-in-cell simulation is carried out by using the electromagnetic, PIC code KARAT.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"29 12 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":"116713392","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
Non-monochromatic fields in a dispersive electrodynamic line. II. the continuous approximation 色散电动力线中的非单色场。2。连续逼近
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316282
A. Gritsunov
{"title":"Non-monochromatic fields in a dispersive electrodynamic line. II. the continuous approximation","authors":"A. Gritsunov","doi":"10.1109/IVELEC.2004.1316282","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316282","url":null,"abstract":"The discrete approximation for evaluation of the non-harmonic fields in a dispersive electrodynamic line with an electron beam has been described in the first part of the paper (ibid., p.220-221). This is universal and wideband approach. However, the normal eigenmode interpolation errors might be excessive, if the number N of the partial eigenmodes is small. Therefore, for regular lines (e.g., a periodic with the period D delay structure or uniform smoothbore waveguide), the continuous approximation, detailed in this paper, might be used.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"11 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":"115450618","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
TWT on goffered waveguide with double modes and double kinds operations 双模双类工作的波导行波管
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316217
A. A. Lavrenov, S. Kolosov
{"title":"TWT on goffered waveguide with double modes and double kinds operations","authors":"A. A. Lavrenov, S. Kolosov","doi":"10.1109/IVELEC.2004.1316217","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316217","url":null,"abstract":"Research on a new combined gyroresonance-gyroton type of interaction large orbit helical electron beam with rotating E/sub 11/ and H/sub 11/ wave modes in a circular goffered waveguide is carried out. Results of the research have shown that the creation of a highly effective TWT with efficiency /spl sim/78 % is possible, produced from the cross and longitudinal energy of an electron beam. The estimation of the space charge fields influence on processes within such a device is given.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"28 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":"115474458","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
Ku-band MPM booster helix TWT design and validation ku波段MPM助推螺旋行波管的设计与验证
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316324
T. Hargreaves, C. Armstrong, R. True, R. Watkins, M. Barsanti, A. Schram
{"title":"Ku-band MPM booster helix TWT design and validation","authors":"T. Hargreaves, C. Armstrong, R. True, R. Watkins, M. Barsanti, A. Schram","doi":"10.1109/IVELEC.2004.1316324","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316324","url":null,"abstract":"Summary form only given. An MPM (microwave power module) booster TWT has been designed using the CHRISTINE RF interaction codes developed by NRL and SAIC. CHRISTINE 1D was used to design a mini-TWT, operating in the Ku band, with the goal of increasing the linear power range of the tube. The electron gun was designed using DEMEOS, our in-house electron beam trajectory code. A full thermal beam run was done to obtain the appropriate beam input into CHRISTINE 3D and a sample drive curve at 14 GHz is given. A full comparison of the measured small signal, large signal, backward-wave stability, and intermodulation products to the predictions of the CHRISTINE codes is presented.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"55 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":"115185728","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
Thermal stability and performance data for Sm-Co 2:17 high temperature magnets on PPM focusing structures Sm-Co 2:17高温磁体在PPM聚焦结构上的热稳定性和性能数据
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316362
J. Liu, M. Walmer
{"title":"Thermal stability and performance data for Sm-Co 2:17 high temperature magnets on PPM focusing structures","authors":"J. Liu, M. Walmer","doi":"10.1109/IVELEC.2004.1316362","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316362","url":null,"abstract":"This paper covers new results on the subjects of thermal stability and performance data for high temperature Sm-Co magnets in PPM configurations. Based on several years of experiments and observations, these high temperature magnets are metallurgically stable at temperatures up to 550/spl deg/C. Following initial thermal stabilization for two hours, these uncoated magnets, held at 300/spl deg/C in air for more than three years, had losses of only 0.3%.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"64 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":"115281401","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
University programs in vacuum electronics in Asia 亚洲大学的真空电子学课程
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316169
H.S. Uhm
{"title":"University programs in vacuum electronics in Asia","authors":"H.S. Uhm","doi":"10.1109/IVELEC.2004.1316169","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316169","url":null,"abstract":"Summary form only given. Various vacuum electronics devices, including klystrons, magnetrons, gyrotrons, and TWTs have been developed in Asian countries for the last several decades. Universities in each country have developed their unique vacuum electronics programs to meet their country's needs. An overview of the vacuum electronics program in Asia is presented. Particularly, the presentation concentrates on vacuum electronics developments in Japan, China, India, Korea and Taiwan.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"44 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":"115333440","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
Design of a 140 GHz, 100 W gyroklystron amplifier 140ghz, 100w回旋速调管放大器的设计
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316270
C. Joye, M. Shapiro, J. Sirigiri, R. Temkin
{"title":"Design of a 140 GHz, 100 W gyroklystron amplifier","authors":"C. Joye, M. Shapiro, J. Sirigiri, R. Temkin","doi":"10.1109/IVELEC.2004.1316270","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316270","url":null,"abstract":"Summary form only given. We present the preliminary design and the simulation results for a 140 GHz, 100 W CW gyroklystron amplifier for use in dynamic nuclear polarization (DNP) experiments. The amplifier operates with a 10 kV, 100 mA electron beam and simulations show a saturated gain of 32 dB at /spl alpha/=1.4 for the TE/sub 02/ mode with an efficiency of 9% and output power of 86 W. The use of photonic band gap (PBG) cavities to suppress mode competition is also under evaluation.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"3 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":"125321002","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: 6
Vacuum electronics and U.S. universities 真空电子学和美国大学
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786) Pub Date : 2004-04-27 DOI: 10.1109/IVELEC.2004.1316167
R. J. Barker
{"title":"Vacuum electronics and U.S. universities","authors":"R. J. Barker","doi":"10.1109/IVELEC.2004.1316167","DOIUrl":"https://doi.org/10.1109/IVELEC.2004.1316167","url":null,"abstract":"This talk is part of IVEC's plenary session discussing educational programs in vacuum electronics from various national perspectives. Here, the position of vacuum electronics in U.S. universities is examined with emphasis on its synergistic relationship with industry and government laboratories. Present dynamics are explored and future possibilities encouraged.","PeriodicalId":283559,"journal":{"name":"Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786)","volume":"23 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":"126555907","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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