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2015 IEEE International Vacuum Electronics Conference (IVEC)最新文献

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The permanent magnet design of a w-band high harmonic peniotron w波段高谐波加速器的永磁体设计
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223869
Hu Biao, Li Tianming, Wang Haiyang, L. Hao, Zhao Jianing, L. Jiayin
{"title":"The permanent magnet design of a w-band high harmonic peniotron","authors":"Hu Biao, Li Tianming, Wang Haiyang, L. Hao, Zhao Jianing, L. Jiayin","doi":"10.1109/IVEC.2015.7223869","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223869","url":null,"abstract":"This paper has numerically investigated and tested the characteristics of permanent magnet among the w-band six-harmonic magnetron-type slotted peniotron, which can well satisfy the requirement of the magnetic field of the interaction and the reversal field of the larger-orbit electron gun. Based on a permanent magnet system, the main advantage of such peniotron is that it can have much more compact size and lower cost and its operational gap can be greatly reduced.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123054131","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
Enhanced radiation in a modified metallic metamaterial driven by pre-bunched electrons 由预聚束电子驱动的改良金属超材料的增强辐射
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223819
Seontae Kim, I. Baek, Ohjoon Kwori, A. Bera, R. Bhattacharya, M. Sattorov, S. Min, G. Park
{"title":"Enhanced radiation in a modified metallic metamaterial driven by pre-bunched electrons","authors":"Seontae Kim, I. Baek, Ohjoon Kwori, A. Bera, R. Bhattacharya, M. Sattorov, S. Min, G. Park","doi":"10.1109/IVEC.2015.7223819","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223819","url":null,"abstract":"Modified metallic metamaterials are known to provide external radiation from Cerenkov-like modes which can be excited using an electron bunch. Extremely strong electromagnetic field enhancement could be formed for compact, efficient free-electron lasers with open metallic structures. The numerical and experimental works will be presented in detail.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127691023","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 W/G-band power splitter for harmonic amplifiers 一种用于谐波放大器的W/ g波段功率分配器设计
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224011
Xiaoqing Zhang, Jun Cai, Y. Hu, Xianping Wu, Ji Chen, Jinjun Feng
{"title":"Design of a W/G-band power splitter for harmonic amplifiers","authors":"Xiaoqing Zhang, Jun Cai, Y. Hu, Xianping Wu, Ji Chen, Jinjun Feng","doi":"10.1109/IVEC.2015.7224011","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224011","url":null,"abstract":"In order to reuse the harmonic current in the spent beam of W-band TWT, we have proposed a novel device, which is a G-band 2nd harmonic amplifier with two output ports for W-band and G-band respectively. Based on the rectangular waveguide cutoff characteristic and iris coupling principle, this paper described a new type of power splitter to extract the 2nd harmonic signal in G-band from mixed fundamental and 2nd harmonic signals. The power splitter has the advantages of simple structure and easy fabrication. From the simulation results, the 2nd harmonic bandwidth of the power splitter is found to be more than 4GHz, with and insertion loss less than-1dB.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127700566","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
Optimization of the resonator of a MW-class frequency step-tunable gyrotron 毫瓦级频率阶跃可调回旋管谐振腔的优化
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223807
K. Avramidis, A. Samartsev, G. Gantenbein
{"title":"Optimization of the resonator of a MW-class frequency step-tunable gyrotron","authors":"K. Avramidis, A. Samartsev, G. Gantenbein","doi":"10.1109/IVEC.2015.7223807","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223807","url":null,"abstract":"We present the optimization, by numerical simulations, of the resonator of an existing MW-class frequency step-tunable gyrotron towards higher efficiency and output power. For different values of the length of the middle section of the resonator, the trade-off between interaction efficiency and ohmic losses - mode competition, is investigated and the optimum length is identified.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127815332","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
Study on a modified laser-triggered vacuum switch 一种改进的激光触发真空开关的研究
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223934
W. Fan, Zhenghao He, Ying Wang, X. Mao, Huazhong Lin, Fali Tan
{"title":"Study on a modified laser-triggered vacuum switch","authors":"W. Fan, Zhenghao He, Ying Wang, X. Mao, Huazhong Lin, Fali Tan","doi":"10.1109/IVEC.2015.7223934","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223934","url":null,"abstract":"In this paper, a modified laser-trigged vacuum switch(LTVS) is developed to optimize the triggered vacuum switch (TVS) and complies with the requirements of pulsed power technology. The comparison between a flat-electrode type switch and a multi-electrode type switch is discussed founded on the simulation and experimental results. The results show that the delay time of the modified switch can reach as low as 17 ns and the operating voltage ranges from 60V to 20KV. Finally, laser energy influencing the trigger characteristics is analyzed built on the thermionic mechanism.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128624320","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 novel phase shifter for high power microwave applications 一种新型高功率微波移相器设计
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223835
Letian Guo, Chao Chang, Wen-hua Huang, Jun Sun, Yansheng Liu
{"title":"Design of a novel phase shifter for high power microwave applications","authors":"Letian Guo, Chao Chang, Wen-hua Huang, Jun Sun, Yansheng Liu","doi":"10.1109/IVEC.2015.7223835","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223835","url":null,"abstract":"A compact high power microwave phase shifter is proposed in this paper. Firstly, a novel dual circular polarizer which can convert the input rectangular waveguide TE10 mode to the circular waveguide pure circular polarized TE11 mode is designed. Then a metal plug driven by a high-speed sever motor is used to adjust the output RF phase by changing the position of the movably short dual circular polarized port. The output RF phase varies 360° by moving a half of the guided wavelength. The cold tests and high power microwave experiment have been carried out which are consistent with the theory design perfectly.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115979915","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
Development of a wide-band HE11 mode window for a W-band gyro-TWA w波段陀螺- twa宽频带HE11模式窗口的研制
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223781
C. Donaldson, P. Mcelhinney, Liang Zhang, Wenlong He
{"title":"Development of a wide-band HE11 mode window for a W-band gyro-TWA","authors":"C. Donaldson, P. Mcelhinney, Liang Zhang, Wenlong He","doi":"10.1109/IVEC.2015.7223781","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223781","url":null,"abstract":"Microwave windows are a critical component in gyrotron-traveling wave amplifiers (gyro-TWAs). They are used to couple in or out microwave power whilst maintaining the vacuum inside the beamtube. Broadband windows are very difficult to manufacture, especially for microwave amplifiers which require a very low reflection. Presented in this paper is the design, simulation and measurement of a wide-band (90 to 100 GHz) multilayer microwave window using the HE11 mode as the input microwave mode. The simulated performance shows a better than -30 dB reflection over a 10% bandwidth of 90-100 GHz. The measured window is in very good agreement with the simulated results.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116327471","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 results of an electron optics system for a Ka-band klystron ka波段速调管电子光学系统的仿真结果
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223862
Haiyu Zhang, Ding Zhao, Jirun Luo
{"title":"Simulation results of an electron optics system for a Ka-band klystron","authors":"Haiyu Zhang, Ding Zhao, Jirun Luo","doi":"10.1109/IVEC.2015.7223862","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223862","url":null,"abstract":"Simulation of an electron gun with a high compression ratio for a Ka-band klystron is presented in this abstract. The electron gun operates under the voltage of 14kV with a beam current of 1A with a p shaped permanent-magnet focusing structure. The beam filling factor is less than 0.7, and the beam ripple of the average beam radius is about 10%. It is helpful for the subsequent engineering practices.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116985737","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
Influence of surface charging on secondary-electron yield of MgO film 表面充电对MgO膜二次电子产率的影响
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224039
Q. Wei, M. Fu, Shengli Wu, Wenbo Hu, Jintao Zhang
{"title":"Influence of surface charging on secondary-electron yield of MgO film","authors":"Q. Wei, M. Fu, Shengli Wu, Wenbo Hu, Jintao Zhang","doi":"10.1109/IVEC.2015.7224039","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224039","url":null,"abstract":"The influence of surface charging on secondary electron emission yield of the MgO film bombarded at low energy electron has been analyzed from charging kinetics and current density effects. The surface charging affects not only the original incident electron energy but also the efficiency of secondary electron emission. We can expect that these results are helpful for accomplishing a secondary electron yield with a slow decay rate for MgO thin film.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115757934","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 theoretical calculation of attenuator-coated helix slow-wave structure 涂有衰减器的螺旋慢波结构的理论计算
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224042
Luwei Liu, M. Valeriy, H. Xi, J. Shang, Lulu Yang, Zhaochang He
{"title":"The theoretical calculation of attenuator-coated helix slow-wave structure","authors":"Luwei Liu, M. Valeriy, H. Xi, J. Shang, Lulu Yang, Zhaochang He","doi":"10.1109/IVEC.2015.7224042","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224042","url":null,"abstract":"Multiple conductor method is used to calculate the attenuation of the attenuator-coated helix slow-wave structure. The results have high-accuracy for practice and coincide with the experimental data.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114141564","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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