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2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)最新文献

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An Efficient Eigensolver for Extended Interaction Klystrons Based on Finite Element Method 基于有限元法的扩展相互作用速调管的有效本征解
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520551
Li Xu, Hangxin Liu, Xing Li, Zhonghai Yang, Bin Li
{"title":"An Efficient Eigensolver for Extended Interaction Klystrons Based on Finite Element Method","authors":"Li Xu, Hangxin Liu, Xing Li, Zhonghai Yang, Bin Li","doi":"10.1109/IVEC45766.2020.9520551","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520551","url":null,"abstract":"This paper presents an efficient eigensolver based on finite element method (FEM) for metallic-lossy multigap cavities in extended interaction klystrons (EIKs). By modeling a W-band sheet-beam EIK (SBEIK), the eigensolver is validated. Moreover, it is found that our eigensolver is much more efficient than the widely used commercial FEM code i.e. HFSS, which would be very useful for the design of multigap cavities of EIKs.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125867941","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
Miniaturized Metamaterial-based Sheet Beam Radiation Sources 小型化超材料片束辐射源
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520598
Xuanming Zhang, Hengyu Luo, Xin Wang, T. Tang, Zhanliang Wang, H. Gong, Y. Gong, Z. Duan
{"title":"Miniaturized Metamaterial-based Sheet Beam Radiation Sources","authors":"Xuanming Zhang, Hengyu Luo, Xin Wang, T. Tang, Zhanliang Wang, H. Gong, Y. Gong, Z. Duan","doi":"10.1109/IVEC45766.2020.9520598","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520598","url":null,"abstract":"In this paper, we investigate the transmission characteristics of metamaterial (MTM) -based slow-wave structure (SWS) with two waveguide couplers by using the frequency domain solver in CST 2016 Microwave Studio. The radiation source is also presented here based on the above structure to study the beam-wave interaction verified by the particle-in-cell (PIC) in CST 2016 Particle Studio. The simulation results show that the MTM-based SWS has a pass band near 3 GHz. Meanwhile, the radiation source has electronic efficiency of 26.7% and its peak output power is 61.6 kW at 2.83 GHz when the beam voltage and beam current are 38.5 kV and 6 A, respectively. The characteristic of miniaturization is shown by the fact that the transverse dimension of the MTM-based SWS is approximately 1/7 to 3/7 of the corresponding S band conventional structure.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129818628","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 General Empirical Model of Secondary Electron Yield and Its Application in Monte Carlo Simulation of a Microporous Gold Surface 二次电子产率的一般经验模型及其在金微孔表面蒙特卡罗模拟中的应用
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520587
A. Iqbal, J. Ludwick, S. Fairchild, M. Cahay, D. Gortat, M. Sparkes, W. O'Neill, T. Back, Peng Zhang
{"title":"A General Empirical Model of Secondary Electron Yield and Its Application in Monte Carlo Simulation of a Microporous Gold Surface","authors":"A. Iqbal, J. Ludwick, S. Fairchild, M. Cahay, D. Gortat, M. Sparkes, W. O'Neill, T. Back, Peng Zhang","doi":"10.1109/IVEC45766.2020.9520587","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520587","url":null,"abstract":"We present a general empirical model of secondary electron yield (SEY), which successfully fits the experimentally measured SEY of a flat gold surface for both normal and oblique incidence of primary electrons. This empirical model is applied in a two-dimensional Monte Carlo (MC) simulation to estimate the effective SEY reduction of a microporous surface. The simulation results are in very good agreement with the experimental data.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124758470","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
Research on New Grating Structure Based on 340GHz Super Smith-purcell Radiation 基于340GHz超Smith-purcell辐射的新型光栅结构研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520433
Guanyi Zhang, Zhenhua Wu, Jian Zhang, Min Hu, R. Zhong, Shenggang Liu
{"title":"Research on New Grating Structure Based on 340GHz Super Smith-purcell Radiation","authors":"Guanyi Zhang, Zhenhua Wu, Jian Zhang, Min Hu, R. Zhong, Shenggang Liu","doi":"10.1109/IVEC45766.2020.9520433","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520433","url":null,"abstract":"In this paper, a new grating structure based on Smith-Purcell superradiation is studied. Smith-Purcell super-radiation is coherent Smith-Purcell radiation generated by free electrons swept over the surface of the grating. Its frequency is a multiple of the surface wave. In this paper, the structure and size of the grating were optimized through simulation. The terahertz wave at 340GHz was obtained under the electron beam of 15keV. Compared with the ordinary grating structure, it shortened the oscillation time and reduced the required current density. The waveform is also more stable. The research in this paper is of great significance for the realization of compact, adjustable, high-frequency terahertz radiation sources.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121958361","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 50 Watt W-band MPM 一个50瓦的w波段MPM
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520485
Ji Chen, Fengyan Wang, Zhiwei Zhang, Zhi-gang Wang, Jialu Li, Chang Gao, Z. Zi, Jun Cai
{"title":"A 50 Watt W-band MPM","authors":"Ji Chen, Fengyan Wang, Zhiwei Zhang, Zhi-gang Wang, Jialu Li, Chang Gao, Z. Zi, Jun Cai","doi":"10.1109/IVEC45766.2020.9520485","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520485","url":null,"abstract":"BVERI has developed a wide band microwave power module (MPM) providing over 50W RF power from 91GHz to 97GHz. The MPM includes a folded waveguide CW TWT, a modular electronic power conditioner (EPC) and a solid state amplifier (SSA) with a gain equalizer.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121245366","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
Power Capabilities of Vircators: A Comparison between Simulations, Experiments, and Theory 虚拟机的功率能力:模拟、实验和理论的比较
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520518
Ernesto Neira, Felix Cabrera Vega, C. Kasmi, Fahad Alyafei
{"title":"Power Capabilities of Vircators: A Comparison between Simulations, Experiments, and Theory","authors":"Ernesto Neira, Felix Cabrera Vega, C. Kasmi, Fahad Alyafei","doi":"10.1109/IVEC45766.2020.9520518","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520518","url":null,"abstract":"Maximum power that can be radiated by an Axially Extracted Vircators is calculated using a mathematical model. The established limits are compared against the results of experiments and simulations available in the literature.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125109013","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 and Development of an X-band Pulsed Helix TWT for Space Application 空间应用x波段脉冲螺旋行波管的设计与研制
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520641
T. Chanakya, U. Chandramouli, S. K. Datta, S. Kumar
{"title":"Design and Development of an X-band Pulsed Helix TWT for Space Application","authors":"T. Chanakya, U. Chandramouli, S. K. Datta, S. Kumar","doi":"10.1109/IVEC45766.2020.9520641","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520641","url":null,"abstract":"A compact X-band power booster TWT was designed and developed for space applications that provides minimum of 350W of peak RF output power with 25% duty over a bandwidth of 800MHz with RF efficiency of 22% and minimum gain of 27 dB. This TWT uses an electron gun operating at a cathode voltage of 6 kV and current of 275 mA with beam filling factor of 0.5. The electron beam is focused using PPM structure with peak field of 2600G generated using Sm2Co17 magnets. The SWS comprises tungsten tape helix supported by three azimuthally, symmetrically placed T-shaped APBN support-rods inside a metallic envelope. The dimensions of SWS were derived using the in-house parametric codes and optimized using Eigen-mode solver of CST Studio to achieve the required dispersion characteristics. The beam-wave interaction analysis was carried out using the in-house 1D-codes and was optimized using 3D PIC simulations. The SWS employs positive velocity taper near the output coupler in order to enhance RF interaction efficiency and to reduce the second harmonic content. The length of the SWS is around 93 mm. A 3-stage depressed collector is used to enhance the overall efficiency of the TWT. A prototype TWT is developed and tested for performance and has achieved overall efficiency of 45% with TWT length of 250 mm and weight of 980 grams. This TWT is subjected for operational temperature cycling at +70°C and -20°C and also random vibration to verify the structural integrity and has met the requirements.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127504434","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 of a 0.33-THz Second Harmonic Gyrotron Based on Double Confocal Cavity 基于双共聚焦腔的0.33太赫兹二次谐波回旋管仿真
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520443
Xiaotong Guan, W. Fu, Jiayi Zhang, Dun Lu, Xiangliang Zheng, Yang Yan
{"title":"Simulation of a 0.33-THz Second Harmonic Gyrotron Based on Double Confocal Cavity","authors":"Xiaotong Guan, W. Fu, Jiayi Zhang, Dun Lu, Xiangliang Zheng, Yang Yan","doi":"10.1109/IVEC45766.2020.9520443","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520443","url":null,"abstract":"Confocal cylindrical waveguide performs many good characters, such as big power capacity and low mode density, which are good for designing high harmonic terahertz gyrotron. Motivated by improving beam-wave interaction efficiency of quasi-optical gyrotron, a novel gyrotron beam-wave interaction structure based on double confocal waveguide has been proposed and theoretically analyzed in this paper. A 0.33 THz second harmonic gyrotron oscillator based on double confocal cavity has been designed and simulated by PIC code. It is indicated that double confocal cavity is able to enhance the output power and the interaction efficiency of quasi-optical gyrotron. Besides, the mode characteristic of double confocal waveguide is investigated with the simulation results.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127537601","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
Novel Sawtooth Structure Loading to Mitigate Mode Competition in a 346 GHz Backward Wave Oscillator 346ghz后向波振荡器中抑制模式竞争的新型锯齿结构加载
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520579
Christián Hurd, Yuan Zheng, N. Luhmann
{"title":"Novel Sawtooth Structure Loading to Mitigate Mode Competition in a 346 GHz Backward Wave Oscillator","authors":"Christián Hurd, Yuan Zheng, N. Luhmann","doi":"10.1109/IVEC45766.2020.9520579","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520579","url":null,"abstract":"A novel approach to mitigate mode competition and improve stability in a 346 GHz Backward Wave Oscillator (BWO) by loading a copper sawtooth slow wave structure (SWS) is proposed. The effects of mode competition, and the sawtooth structure loading effects are discussed. CST simulation has been used to verify the analysis and test of the stability of those circuits.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131870649","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
High Power Density Electronic Power Conditioner for Airborne Transmitter 机载发射机高功率密度电子功率调节器
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520458
Neeraj Kumar, A. J. Zabiulla, H.N Pradheep, P. Sidharthan
{"title":"High Power Density Electronic Power Conditioner for Airborne Transmitter","authors":"Neeraj Kumar, A. J. Zabiulla, H.N Pradheep, P. Sidharthan","doi":"10.1109/IVEC45766.2020.9520458","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520458","url":null,"abstract":"The modern airborne transmitters for RF imaging, demand compact size and high RF output power. Miniature Klystrons offer higher efficiency, low voltage operation and compact size as compared to Traveling Wave Tubes (TWT) delivering similar output power within narrow bandwidth. Development of a high power density Electronic Power Conditioner (EPC) described in this paper complements a miniature klystron for delivering low phase-noise in the RF output, achieved with stringent control over the regulation, stability and ripple in the high voltage output for the anode voltage. High efficiency of the EPC allows operation of the transmitter for limited time without cooling.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134220196","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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