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2016 IEEE International Vacuum Electronics Conference (IVEC)最新文献

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Design of frequency selective surfaces for a gyro-multiplier output system 陀螺乘法器输出系统的频率选择曲面设计
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-09-08 DOI: 10.1109/IVEC.2016.7561799
Xiang Li, Xiaoming Liu, Y. Alfadhl, Xiao-dong Chen, Wenlong He, K. Ronald, A. Cross
{"title":"Design of frequency selective surfaces for a gyro-multiplier output system","authors":"Xiang Li, Xiaoming Liu, Y. Alfadhl, Xiao-dong Chen, Wenlong He, K. Ronald, A. Cross","doi":"10.1109/IVEC.2016.7561799","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561799","url":null,"abstract":"This paper presents our on-going work on the development of an output system for a THz gyro-multiplier. The beam-wave interaction and frequency multiplication in the gyro-multiplier generate two high-order modes at two distinguished frequencies. To convert the high-order waveguide modes into quasi-Gaussian beams and separate the two frequencies, a quasi-optical mode converter (QMC) and a frequency selective surface (FSS) are combined in the designed output system. The QMC is used to convert both the high order modes into quasi-Gaussian beams, while the FSS is used to separate the two frequencies. This presentation focuses on the design, fabrication and testing of the required FSS.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124038362","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 scattering parameter simulation program for vacuum tubes' window with FDTD method 一个用时域有限差分法模拟真空管窗散射参数的程序
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-09-08 DOI: 10.1109/IVEC.2016.7561935
Xiaoliang Gu, Xiaolin Jin, Xiaofang Zhu, Bin Li
{"title":"A scattering parameter simulation program for vacuum tubes' window with FDTD method","authors":"Xiaoliang Gu, Xiaolin Jin, Xiaofang Zhu, Bin Li","doi":"10.1109/IVEC.2016.7561935","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561935","url":null,"abstract":"A program is written to calculate the scattering parameter of vacuum tubes' window. The Finite Differential in Time Domain (FDTD) method was applied with stair mesh approximation in the program. A coaxial waveguide window was simulated. And the S11 parameter calculated is in consistent with the CST MWS results.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126054032","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
Harmonic generation under small signal conditions in a traveling wave tube 行波管小信号条件下的谐波产生
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-09-06 DOI: 10.1109/IVEC.2016.7561825
P. Wong, D. Chernin, Peng Zhang, C. Dong, Y. Lau, B. Hoff, D. Simon, G. Greening, R. Gilgenbach
{"title":"Harmonic generation under small signal conditions in a traveling wave tube","authors":"P. Wong, D. Chernin, Peng Zhang, C. Dong, Y. Lau, B. Hoff, D. Simon, G. Greening, R. Gilgenbach","doi":"10.1109/IVEC.2016.7561825","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561825","url":null,"abstract":"In a klystron, charge overtaking of electrons leads to an infinity of AC current. The harmonic content therein can be calculated exactly, with or without space charge effects. This paper extends the klystron theory to a traveling wave tube (TWT). We assume that the electron motion is described by linear theory. The crowding of these linear orbits may lead to harmonic generation, as in a klystron. We calculate the buildup of harmonic content as a function of distance from the input, and compare these analytic results with the CHRISTINE code. Reasonable agreement was found. A dimensionless “bunching parameter” for TWT, X = √2Pin / (PbC), is identified, which characterizes the harmonic content in the AC current, where Pin is the power of the input signal, Pb is the DC beam power, and C is Pierce's gain parameter.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131528982","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 klystron design for the CLIC project CLIC项目高效速调管设计
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-21 DOI: 10.1109/IVEC.2016.7561812
A. Mollard, C. Marchand, F. Peauger, J. Plouin, A. Beunas, R. Marchesin
{"title":"High-efficiency klystron design for the CLIC project","authors":"A. Mollard, C. Marchand, F. Peauger, J. Plouin, A. Beunas, R. Marchesin","doi":"10.1109/IVEC.2016.7561812","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561812","url":null,"abstract":"The CLIC project requests new type of RF sources for the high power conditioning of the accelerating cavities. We are working on the development of a new kind of high-efficiency klystron to fulfill this need. This work is performed under the Eucard-2 European program and involves theoretical and experimental study of a brand new klystron concept.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133870514","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
Simulation and experimental studies of a 2.45GHz magnetron source for an SRF cavity with field amplitude and phase controls 具有场幅和相位控制的SRF腔用2.45GHz磁控管源的仿真与实验研究
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.18429/JACOW-IPAC2016-MOPMY002
Haipeng Wang, T. Plawski, R. Rimmer, M. Neubauer, A. Dudas
{"title":"Simulation and experimental studies of a 2.45GHz magnetron source for an SRF cavity with field amplitude and phase controls","authors":"Haipeng Wang, T. Plawski, R. Rimmer, M. Neubauer, A. Dudas","doi":"10.18429/JACOW-IPAC2016-MOPMY002","DOIUrl":"https://doi.org/10.18429/JACOW-IPAC2016-MOPMY002","url":null,"abstract":"As a drop-in replacement for the CEBAF 8kW CW klystron system, A 1497 MHz, CW type high- efficiency magnetron using injection phase lock with amplitude variation is attractive. Amplitude control using magnetic field trimming and anode voltage modulation has been studied using MatLab/Simulink simulations [1]. Along with a magnetron we are planning to use an FPGA based digital LLRF system, which allows to apply various types of control algorithms in order to achieve the required accelerating field stability. Since the 1497 MHz magnetron has not yet been built, the proof of principle measurements of a typical 2450MHz commercial magnetron are made to characterize the anode I-V curve, output power (the tube electronic efficiency), frequency dependence on the anode current (frequency pushing) and the Rieke diagram (frequency pulling by the reactive load). In the Simulink simulation, extension of the Adler equation governing injection phase stability by Chen's model is included. The results of the linear response to the amplitude and phase control of an SRF cavity, and the specification of the new LLRF control chassis for both 2450 and 1497MHz systems will be presented in this paper.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115166606","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
Fifteen years of linearized traveling-wave tube amplifiers for space communications 十五年空间通信线性化行波管放大器
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.1109/IVEC.2016.7561764
W. Menninger
{"title":"Fifteen years of linearized traveling-wave tube amplifiers for space communications","authors":"W. Menninger","doi":"10.1109/IVEC.2016.7561764","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561764","url":null,"abstract":"The first L-3 linearized channel-amplifier traveling-wave tube amplifiers (LCTWTAs) started shipping in 2001 and launched on Echostar 8 on 22 Aug 2002. Since then, the satellite downlink amplifier market has seen an explosion in the use of LCTWTAs, with virtually every high-power geostationary satellite today taking advantage of the exceptional performance provided by these unique devices. We present an overview of the history, performance and in-orbit heritage of L-3 LCTWTAs produced for commercial satellite communications. The LCTWTA spot FIT rate, in particular, for units manufactured and integrated entirely at L-3 is less than 200.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115416290","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
Research progress on a high-power continuous wave multimode cavity used for microwave hardening 用于微波硬化的大功率连续波多模腔的研究进展
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.1109/IVEC.2016.7561904
Tong Feng, Dongping Gao, Haibing Ding, Zhaochuan Zhang
{"title":"Research progress on a high-power continuous wave multimode cavity used for microwave hardening","authors":"Tong Feng, Dongping Gao, Haibing Ding, Zhaochuan Zhang","doi":"10.1109/IVEC.2016.7561904","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561904","url":null,"abstract":"A microwave hardening system for giant artificial marble blocks has been designed and put into use for actual manufacturing. The high-power continuous wave multimode cavity as the main part of the system can totally process artificial marble blocks of typical size such as 1.6×0.9×0.6m3 which is the 1/5 of the maximum size. Microwave hardening takes less than 1 hour and it is shorter than natural hardening which needs at least 15 days. Mechanical characters of microwave hardened blocks basically conform to those under natural hardening.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115420179","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
Using HfC(210) and HfC(110) as high brightness electron sources 采用HfC(210)和HfC(110)作为高亮度电子源
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.1109/IVEC.2016.7561779
W. Mackie, G. Magera, J. Lovell
{"title":"Using HfC(210) and HfC(110) as high brightness electron sources","authors":"W. Mackie, G. Magera, J. Lovell","doi":"10.1109/IVEC.2016.7561779","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561779","url":null,"abstract":"We report on high-brightness, thermal-field emission cathodes using (210) and (110) oriented hafnium carbide. HfC(210) cathodes are shown to deliver very high angular intensities to >50 mA/sr and remain stable. Modeling and experimental data are shown which highlights the utility of these sources for SEM and other high-brightness uses.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"518 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123114260","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
Vacuum electron-based photodiode 真空电子光电二极管
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.1109/IVEC.2016.7561777
Siwapon Srisonphan, N. Teerakawanich
{"title":"Vacuum electron-based photodiode","authors":"Siwapon Srisonphan, N. Teerakawanich","doi":"10.1109/IVEC.2016.7561777","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561777","url":null,"abstract":"We have presented a detailed investigation of hybrid photodiode based on the combination of Gr/Si heterojunction and nanoscale vacuum device based on graphene-SiO2-Si (GrOS) field effect structure. We elucidate on the underlying mechanism of impact-ionization process in a two-Dimensional Electron Gas (2DEG) confined in quantum well, resulting in increasing the carrier multiplication and enabling ultrahigh speed optoelectronics.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122180335","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
Designing an electron gun for an efficient Mobile Ionospheric Heating Source 一种高效移动电离层热源电子枪的设计
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-19 DOI: 10.1109/IVEC.2016.7561770
J. A. Karakkad, B. Beaudoin, J. Rodgers, G. Nusinovich, N. Goyal, T. Antonsen
{"title":"Designing an electron gun for an efficient Mobile Ionospheric Heating Source","authors":"J. A. Karakkad, B. Beaudoin, J. Rodgers, G. Nusinovich, N. Goyal, T. Antonsen","doi":"10.1109/IVEC.2016.7561770","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561770","url":null,"abstract":"The University of Maryland is developing a high power Radio Frequency (RF) source for use as a Mobile Ionospheric Heating Source (MIHS). This prototype will utilize Inductive Output Tube (IOT) technology operating in class-D amplifier mode using a grid-less electron gun. This paper will present a novel grid-less electron gun design, capable of producing annular beams with high currents in the range of 15A that utilizes a mod-anode to bring the gun from cut-off to saturation.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121137436","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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