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170W Ka-Band space TWT 170W ka波段空间行波管
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857480
Jean Gastaud, Evelyne Gerard, A. Laurent, Heiko Stalzer
{"title":"170W Ka-Band space TWT","authors":"Jean Gastaud, Evelyne Gerard, A. Laurent, Heiko Stalzer","doi":"10.1109/IVEC.2014.6857480","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857480","url":null,"abstract":"In satellite systems, on-board repeaters shall deliver always more RF power. Specifically in Ka-Band applications like HDTV or Internet, the satellite Capacity must be increased to improve the Data Rate Transfer. This Capacity increase leads to a substantial increase of Specified RF Output Power. In order to respond to this demand, Thales Electron Devices (TED), with the support of CNES (French Space Agency), has qualified a conduction cooled TWT (TH4816C) and is currently completing the Qualification of a radiation cooled TWT (TH4816R). These TWTs deliver 170W in Ka frequency band. This paper gives the main technical characteristics of the TH4816 family design and the main performances over the full Ka frequency band from 17.3 to 21.2 GHz.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"215 1","pages":"41-42"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74165382","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
ICEPIC study of metamaterial-like rodded cathode in a relativistic A6 magnetron 相对论A6磁控管中类超材料棒状阴极的ICEPIC研究
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857649
C. Leach, S. Prasad, E. Schamiloglu
{"title":"ICEPIC study of metamaterial-like rodded cathode in a relativistic A6 magnetron","authors":"C. Leach, S. Prasad, E. Schamiloglu","doi":"10.1109/IVEC.2014.6857649","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857649","url":null,"abstract":"A metamaterial-like rodded cathode in a relativistic A6 magnetron was simulated using ICEPIC [1] to study the effect that a grid of fine rods have on increasing space-charge-limited current emission from the cathode, on affecting the microwave power, and on encouraging a beneficial interaction with the RF mode.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"41 1","pages":"381-382"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74298846","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
Plenary talk: Revisiting the world above 100 GHz: What has changed in six years 全体会议发言:重新审视100ghz以上的世界:六年来发生了什么变化
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857462
H. Bruce Wallace
{"title":"Plenary talk: Revisiting the world above 100 GHz: What has changed in six years","authors":"H. Bruce Wallace","doi":"10.1109/IVEC.2014.6857462","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857462","url":null,"abstract":"In 2008, Dr. Mark Rosker presented a Plenary presentation describing his vision of issues and requirements above 100 GHz which would drive vacuum electronic device research and development. Since that time, the author has joined DARPA and has instituted programs that are dependent upon those device development programs discussed. This presentation will revisit those issues and requirements, discuss new DARPA programs that rely upon those developments and how the process of applying the components Dr. Rosker has taken us to the next level of challenges in vacuum electronic device development.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"6 1","pages":"5-5"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74740347","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
Simulation and test of cathode heating power and temperature distribution 阴极加热功率和温度分布的模拟与测试
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857722
Hui Wang, Wensheng Shao, Ming Zhang
{"title":"Simulation and test of cathode heating power and temperature distribution","authors":"Hui Wang, Wensheng Shao, Ming Zhang","doi":"10.1109/IVEC.2014.6857722","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857722","url":null,"abstract":"In order to achieve the temperature distribution of cathode in vacuum electronic device, which is necessary to analyze the mechanism of thermo-electronic emission, software Comsol is used to build different physical models for certain structures of cathode in TWT and Thyratron. Results of these temperature simulations are in good agreement with those of actual test. Therefore, the method by numerical simulation to analyze the temperature distribution of cathode in vacuum device, which is used in this paper, is accurate and effective.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"13 1","pages":"527-528"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73127694","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
Increased resistance of rough copper surfaces at terahertz frequencies 粗糙铜表面在太赫兹频率下的电阻增加
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857537
M. Kirley, J. Booske
{"title":"Increased resistance of rough copper surfaces at terahertz frequencies","authors":"M. Kirley, J. Booske","doi":"10.1109/IVEC.2014.6857537","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857537","url":null,"abstract":"We find that the surface resistance of smooth copper exceeds that predicted by classical electromagnetic theory. We have fabricated copper surfaces with controlled roughness and grain size. We will present measurements of the reflectivity of these copper surfaces and compare these results to theoretical predictions for the THz resistance of surfaces.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"170 1","pages":"157-158"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73244923","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
W-band 100W pulsed TWT amplifiers for power combining experiment 功率组合实验用w波段100W脉冲行波管放大器
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857546
Jinjun Feng, Jun Cai, Xianping Wu, Y. Hu, Yanjun Cui, Yinghua Du, Ruitong Dong, Jingkai Liu, Ji Chen, Xiaoqing Zhang, Yi Tong, Yunhai Li
{"title":"W-band 100W pulsed TWT amplifiers for power combining experiment","authors":"Jinjun Feng, Jun Cai, Xianping Wu, Y. Hu, Yanjun Cui, Yinghua Du, Ruitong Dong, Jingkai Liu, Ji Chen, Xiaoqing Zhang, Yi Tong, Yunhai Li","doi":"10.1109/IVEC.2014.6857546","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857546","url":null,"abstract":"W-band pulsed TWT Amplifiers have been developed as transmitters for weather radar of cloud detection. The test results show that two amplifiers can reach over 100W output power at 10% duty cycle in the air cooling condition.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"4 1","pages":"173-174"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90412006","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
Plenary Talk: Advanced high frequency acceleration 全体会议发言:先进的高频加速
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857460
Sami G. Tantawi
{"title":"Plenary Talk: Advanced high frequency acceleration","authors":"Sami G. Tantawi","doi":"10.1109/IVEC.2014.6857460","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857460","url":null,"abstract":"Summary form only given. During the last few years, we have successfully gained a qualitative understanding of the basic physics of breakdown phenomena in high vacuum RF structures. We have been able to use this knowledge of geometrical effects and material properties to develop accelerator structures with gradients well above the state of the art. It has now been demonstrated that room temperature linacs can operate at gradients up to 175 MV/m - six times the gradient of the best superconducting structures. However, operation at these high gradients requires extremely high power RF sources, which with current technology, are not very cost-effective. These problems will become even more pronounced with the next generation of high gradient structures. To push the gradient further, the scaling laws we developed would require higher frequency, shorter filling time and equivalently very short pulses. Initial investigation shows the possibility of a 1 GV/m structure at W-band that operates for only 3 ns. The next stage of development must address efficient production and utilization of RF power for linacs as well as high gradient structure technologies. This is not a simple task. The technologies used for high power RF sources have a long history and appear to be mature, with only minor improvements likely. We need to create a paradigm shift in the art. To this end, we should cross-fertilize the art from other disciplines, utilize the unique characteristics of the linacs to create specialized sources, and conduct active research on all fronts for energy recovery at every stage, from wall plug to accelerator structure. We will present a vision for this required research and development.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"44 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84563828","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
A plane TWT model on one impedance electrode 一个阻抗电极上的平面行波管模型
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857562
A. Yelizarov, Y. Pchelnikov
{"title":"A plane TWT model on one impedance electrode","authors":"A. Yelizarov, Y. Pchelnikov","doi":"10.1109/IVEC.2014.6857562","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857562","url":null,"abstract":"The plane TWT model on one impedance electrode is offered and analyzed in this paper. The \"hot\" dispersion equation for the adjacent to the impedance electrode a homogeneous sheet electron beam is found. Formulas for coefficients of the TWT characteristic equation, coupling and depression coefficients, are derived by differentiating the dispersion equation.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"60 1","pages":"205-206"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83390086","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
Experimental demonstration of a pulsed, self-biasing depressed collector 脉冲自偏压集电极的实验演示
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857563
M. Kemp, A. Jensen, J. Neilson
{"title":"Experimental demonstration of a pulsed, self-biasing depressed collector","authors":"M. Kemp, A. Jensen, J. Neilson","doi":"10.1109/IVEC.2014.6857563","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857563","url":null,"abstract":"High peak-power RF sources common to accelerator applications have ever-increasing electrical efficiency requirements. As such, SLAC is investigating methods to increase RF source efficiency for pulsed systems. A novel self-biasing depressed collector has been proposed. This paper is a description of the experimental demonstration of the technique.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"68 1","pages":"207-208"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74466807","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
Stability analysis of W-band extended interaction output cavity w波段扩展相互作用输出腔的稳定性分析
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857630
Yong Zhong, Yong Wang
{"title":"Stability analysis of W-band extended interaction output cavity","authors":"Yong Zhong, Yong Wang","doi":"10.1109/IVEC.2014.6857630","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857630","url":null,"abstract":"In this paper, a novel w-band extended interaction output cavity stability analysis is presented. Adopting beam quality factor and PIC code, stability analysis of the eight ladder grids cavity is discussed for the 2π operation mode. Results show that reasonable beam quality factor can reach more stable output power without oscillation of parasitic mode.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"4 1","pages":"343-344"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90755922","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
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