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

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Demonstration of a W-band TWT with 10 GHz Bandwidth 10 GHz带宽w波段行波管的演示
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520602
A. Cook, C. Joye, R. Jaynes, J. Rodgers, I. Chernyavskiy, F. Wood, E. Wright, K. Nguyen, Takuji Kimura, J. Atkinson, G. Aymar
{"title":"Demonstration of a W-band TWT with 10 GHz Bandwidth","authors":"A. Cook, C. Joye, R. Jaynes, J. Rodgers, I. Chernyavskiy, F. Wood, E. Wright, K. Nguyen, Takuji Kimura, J. Atkinson, G. Aymar","doi":"10.1109/IVEC45766.2020.9520602","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520602","url":null,"abstract":"We present testing of a W-band traveling-wave tube (TWT) based on a serpentine waveguide circuit, powered by a 20 kV, 130mA electron gun. We measure peak output power of 215±2W at 93 GHz with 20.1±0.15dB saturated gain, and>100 W from 88-98 GHz, pulsed at 0.1% duty. Operating at 20.8 kV, the TWT produces 285±3W at 91 GHz with 22.4±0.15dB gain.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"2 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":"123745106","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
Secondary Electron Yield Measurements on Materials of Interest to Vacuum Electron Communication Devices 真空电子通信器件相关材料的二次电子产率测量
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520541
T. Malik, M. Gilmore, S. Portillo, E. Schamiloglu
{"title":"Secondary Electron Yield Measurements on Materials of Interest to Vacuum Electron Communication Devices","authors":"T. Malik, M. Gilmore, S. Portillo, E. Schamiloglu","doi":"10.1109/IVEC45766.2020.9520541","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520541","url":null,"abstract":"Vacuum electron devices (VEDs) can experience degraded performance, including complete failure, due to multipactor breakdown (MPB). This effect is tied to the production and acceleration of secondary electrons due to electron impact and coupling to the RF fields. In order to better understand the initiation of MPB with materials of interest, researchers at the University of New Mexico (UNM) are carrying out a study of the secondary electron yield (SEY) contribution from various materials used in high power VEDs. This work describes SEY data from electron bombardment in the low energy regime, from 10 eV to 1 keV, on Cu as a baseline material, - stainless steel, aluminum 6061 (Al) and Invar (Fe64/Ni36). SEY data for Cu as a function of incident beam angle is also presented. In addition, different surface cleaning treatment protocols employed in this study will be described.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"59 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":"126280786","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 Vacuum Window Based on Metamaterial 基于超材料的真空窗
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520473
Jingxuan Shen, Ningfeng Bai, Changsheng Shen, Xiaohan Sun, P. Pan, Jun Cai, Jinjun Feng
{"title":"A Vacuum Window Based on Metamaterial","authors":"Jingxuan Shen, Ningfeng Bai, Changsheng Shen, Xiaohan Sun, P. Pan, Jun Cai, Jinjun Feng","doi":"10.1109/IVEC45766.2020.9520473","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520473","url":null,"abstract":"This paper presented a vacuum window based on metamaterial. The vacuum window is designed for 94.95 GHz and the dielectric is sapphire piece with thickness of 0.4mm. In the cold-test simulation, the Voltage Standing Wave Ratio (VSWR) is 1.0029 at 94.95GHz and it achieves a 3 GHz bandwidth with VSWR below 1.2.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"41 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":"131691982","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
Direct Coupled Gyrotrons for Plasma Heating 等离子体加热用直接耦合回旋管
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520537
L. Ives, D. Marsden, G. Collins, Jeffry Neilson, James P. Anderson, Kurt W. Zeller
{"title":"Direct Coupled Gyrotrons for Plasma Heating","authors":"L. Ives, D. Marsden, G. Collins, Jeffry Neilson, James P. Anderson, Kurt W. Zeller","doi":"10.1109/IVEC45766.2020.9520537","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520537","url":null,"abstract":"High power gyrotrons typically produce RF power in a ${HE}_{11}$ waveguide inside the vacuum. The direct coupler was Gaussian free-space mode. An internal converter transforms the integrated into the 110 GHz, 1 MW, short pulse gyrotron at MIT, whispering gallery mode from the cavity to a Gaussian beam using a shown in Fig. 1. Tests indicated that the gyrotron produced the quasi-optical launcher and a series of mirrors. Transmission of this same output power and efficiency as the conventional Gaussian power typically requires transformation into an ${HE}_{11}$ mode in corrugated waveguide. This conversion is achieved using a Mirror Optical Unit, which uses a second series of mirrors. The transformation of the whispering gallery mode to a Gaussian beam and then to an ${HE}_{11}$ mode requires a complexity of RF structures, increasing cost and RF losses. This program is developing a coupler that transforms the whispering gallery mode directly into an ${HE}_{11}$ mode inside the gyrotron. This results in significant reduction in gyrotron cost and RF losses and eliminates the Mirror Optical Unit.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"35 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":"130348555","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
Enhance the Efficiency of Sheet Beam TWT with Advanced Optimization Algorithm 利用先进的优化算法提高板梁行波管的效率
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520513
Zeng Liu, Jianxun Wang, Yixin Wan, Qiang Liu, Yong Luo
{"title":"Enhance the Efficiency of Sheet Beam TWT with Advanced Optimization Algorithm","authors":"Zeng Liu, Jianxun Wang, Yixin Wan, Qiang Liu, Yong Luo","doi":"10.1109/IVEC45766.2020.9520513","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520513","url":null,"abstract":"The sheet beam traveling-wave tube (SBTWT) with staggered double vane (SDV) structure has attracted much attention as a board band and powerful terahertz and millimeter-wave source. In this paper, the velocity taper for SDV structure is optimized with a recently proposed swarm-intelligence (SI) based optimization algorithm named dragonfly algorithm (DA) in order to enhance the beam-wave interaction efficiency in sheet beam TWT. The optimization result of this algorithm is compared with other commonly used algorithms. The taper optimized with DA is verified with CST particle in cell (PIC) simulations. The efficiency of the optimized structure has been greatly increased in both optimization and PIC simulations.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"10 Suppl 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":"116481578","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
Reliability Optimization Techniques in High Power, High Duty Factor Klystrons 大功率、高占空因数速调管的可靠性优化技术
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520499
J. Moss, George Toby, Timothy H. Miner, C. Peters
{"title":"Reliability Optimization Techniques in High Power, High Duty Factor Klystrons","authors":"J. Moss, George Toby, Timothy H. Miner, C. Peters","doi":"10.1109/IVEC45766.2020.9520499","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520499","url":null,"abstract":"The Spallation Neutron Source (SNS) Radiofrequency (RF) Systems have enjoyed high reliability (>97.5 percent) over the past five years due in large part to the techniques used to optimize the operation of the klystron amplifiers. SNS klystrons operate at up to an 8 percent duty factor with a peak RF output power of up to 5 MW. Reliable operation starts with the process used to characterize each klystron and adjust its operational parameters in situ for the best performance. Techniques are described here with examples.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"81 6 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":"129909679","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
Some Advantages of the Gyrotrons with Width Emitters 宽幅发射体回旋管的若干优点
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520621
M. Proyavin, G. Nusinovich, O. Dumbrajs, M. Glyavin
{"title":"Some Advantages of the Gyrotrons with Width Emitters","authors":"M. Proyavin, G. Nusinovich, O. Dumbrajs, M. Glyavin","doi":"10.1109/IVEC45766.2020.9520621","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520621","url":null,"abstract":"The main trends in gyrotron development are escalation of the radiated power and increasing the frequency of coherent radiation. For both trends it is beneficial to develop gyrotrons with wide emitters because this allows one to use cryomagnets with smaller inner bore sizes. For analyzing and optimizing the operation of gyrotrons with wide emitters it is proposed to represent such emitters as a superposition of thin rings and analyze the properties of electron beams emitted by each of these rings. The analysis of electron beam properties, for electron optical systems with different emitters is presented. The possibility to reduce velocity spread by anode profiling is discussed. The dynamics of electron beam and interaction efficiency for different emitters are calculated.","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":"129947066","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
W-band Multi-Beam Sine Waveguide Traveling-Wave Tube with Low Current Density 低电流密度w波段多波束正弦波导行波管
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520604
S. Fang, Jin Xu, X. Lei, Gangxiong Wu, R. Yang, P.C. Yin, H. Yin, Lingna Yue, G. Zhao, Wei Yang, Zhigang Lu, Y. Gong, Wenxiang Wang, Yanyu Wei
{"title":"W-band Multi-Beam Sine Waveguide Traveling-Wave Tube with Low Current Density","authors":"S. Fang, Jin Xu, X. Lei, Gangxiong Wu, R. Yang, P.C. Yin, H. Yin, Lingna Yue, G. Zhao, Wei Yang, Zhigang Lu, Y. Gong, Wenxiang Wang, Yanyu Wei","doi":"10.1109/IVEC45766.2020.9520604","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520604","url":null,"abstract":"A W-band multi-beam traveling-wave tube (TWT) based on sine slow-wave structure is designed. The cold bandwidths of the fundamental and higher-order modes in the slow-wave circuit are analyzed using HFSS software. Through reasonable structural design, the fundamental mode and low-order mode are suppressed. The beam-wave interaction capability of the multi-beam TWT is analyzed based on the high-order mode transmission design. At the voltage of 11.7 kV, the current density of the sheet electron beam is 96 A/cm2 which can be produced by the non-convergent electron gun, and the output power is over 150 W in the operating frequency 90 GHz-100 GHz.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"3 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":"130669809","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
Operation Condition of GW Class Magnetron with Diffraction Output in Particle-In-Cell Simulation 粒子池模拟中具有衍射输出的GW级磁控管的工作条件
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520609
S. M. Chung, S. Tuan
{"title":"Operation Condition of GW Class Magnetron with Diffraction Output in Particle-In-Cell Simulation","authors":"S. M. Chung, S. Tuan","doi":"10.1109/IVEC45766.2020.9520609","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520609","url":null,"abstract":"Particle-In-Cell (PIC) simulations were performed to study the GW operation condition of an A6 Magnetron with Diffraction Output (MDO) with transparent cathodes. The input waveform is a -500 KV pulse of 100 ns pulse width. The results show the GW class output power appears after 30 ns at 0.36 T external magnetic field, which is within theoretical prediction of conventional Buneman-Hartree (B-H) condition, but is very sensitive to magnetic field strength. The actual energy efficiency maybe lower than expected.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"1989 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":"130696010","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 Planar Sheet-Beam Magnetron Injection Gun 平面板束磁控管注射枪的设计
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520438
Yidong Xiang, Q. Xue, Ding Zhao, Xiaofei Li
{"title":"Design of a Planar Sheet-Beam Magnetron Injection Gun","authors":"Yidong Xiang, Q. Xue, Ding Zhao, Xiaofei Li","doi":"10.1109/IVEC45766.2020.9520438","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520438","url":null,"abstract":"A planar sheet-beam magnetron injection gun for the 94GHz sheet beam metallic grating waveguide amplifier based on combined resonance has been designed in this paper. The planar sheet-beam magnetron injection gun has two anodes which can optimize velocity ratio and transverse velocity spread conveniently. The electron beam produced by the planar sheet-beam magnetron injection gun can operate at accelerating voltage 34kV and current 1.7A. The guiding center of the electron beam at the region of interaction is 0.525mm and the magnetic field at interaction region is 2.8T. The simulation result of Opera indicate that the velocity ratio is 1.16 and transverse velocity spread is 3.5%.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"98 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":"133336553","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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