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

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Effect of the Position Variation of the Launcher Cut on the Conversion Efficiency of the Gaussian Beam in a Denisov-type Mode Converter 发射切口位置变化对杰尼索夫型模式转换器高斯光束转换效率的影响
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520505
Chen Yang, Wenqi Li, Zhi-qiang Zhang, Zhixian Li, Meng-Li Jiao, Mingkui Zhu, Wei Guo, Jirun Luo
{"title":"Effect of the Position Variation of the Launcher Cut on the Conversion Efficiency of the Gaussian Beam in a Denisov-type Mode Converter","authors":"Chen Yang, Wenqi Li, Zhi-qiang Zhang, Zhixian Li, Meng-Li Jiao, Mingkui Zhu, Wei Guo, Jirun Luo","doi":"10.1109/IVEC45766.2020.9520505","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520505","url":null,"abstract":"In this abstract, the position variation of the launcher cut was slightly adjusted for decreasing the effect of the diffraction on the launcher conversion efficiency of the Gaussian beam from the T$E_{28,8}$ mode in Denisov converter, which shows that the Gaussian beam content can be improved indeed","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"96 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":"123188905","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 Investigation of Bulk and Thin Film Perovskite SrVO3 as a Thermionic Cathode Material 块状和薄膜钙钛矿SrVO3作为热离子正极材料的实验研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520630
Lin Lin, R. Jacobs, Samuel D. Marks, P. Evans, D. Morgan, J. Booske
{"title":"Experimental Investigation of Bulk and Thin Film Perovskite SrVO3 as a Thermionic Cathode Material","authors":"Lin Lin, R. Jacobs, Samuel D. Marks, P. Evans, D. Morgan, J. Booske","doi":"10.1109/IVEC45766.2020.9520630","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520630","url":null,"abstract":"First-principles calculations based on Density Functional Theory (DFT) previously revealed that perovskite SrVO3 is a promising candidate for thermionic emission applications. In this work, polycrystalline bulk and epitaxial thin film SrVO3 samples have been experimentally examined. Both bulk and epitaxial SrVO3 can exhibit low work function, consistent with DFT calculations and corresponding promising thermionic emission behavior. SrVO3 is a potentially good thermionic emitter material and points more broadly to perovskite materials as a family of compounds which may further the development of next-generation thermionic electron emitters.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"156 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":"123473083","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
Opportunities in Cathode Research Enabled by Advanced Nanoscale Material Control and Understanding 先进的纳米材料控制和理解使阴极研究的机会成为可能
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520542
J. Yater
{"title":"Opportunities in Cathode Research Enabled by Advanced Nanoscale Material Control and Understanding","authors":"J. Yater","doi":"10.1109/IVEC45766.2020.9520542","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520542","url":null,"abstract":"New cathode technology is needed to enable the development of next-generation vacuum electronic devices. By exploiting recent advances in materials growth, processing, and characterization capabilities, opportunities exist in cathode research to better control and tailor the nano/micro-scale structure and composition of emitter materials and to develop an understanding of the critical material properties needed for enhanced emission capabilities.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"29 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":"124162718","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 G-band Folded Waveguide Traveling-wave Tube g波段折叠波导行波管的设计
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520580
Ping Han, Zugen Guo, Zhixin Yang, Rujing Ji, Ruifeng Zhang, H. Gong
{"title":"Design of G-band Folded Waveguide Traveling-wave Tube","authors":"Ping Han, Zugen Guo, Zhixin Yang, Rujing Ji, Ruifeng Zhang, H. Gong","doi":"10.1109/IVEC45766.2020.9520580","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520580","url":null,"abstract":"When it comes to the terahertz band, it is a challenging task to design traveling-wave tube. In this paper, the design of G-band folded waveguide traveling-wave tube (FWGTWT) is introduced in detail. The simulation results show that the folded waveguide circuit can produce over 27.5dB gain and over 15W output power within 10GHz bandwidth, when the beam current of the electron optical system (EOS) is 40 mA and the beam transmission rate is 100% with cathode voltage -19.25kV and the first anode -3kV.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"20 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":"126333196","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
Multiple Beam Power Grid Tubes for High Frequency and High Power Operation 用于高频大功率运行的多波束电网管
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520557
L. Ives, M. Read, T. Bui, D. Marsden, G. Collins, T. Habermann, R. Ho, T. Cox, Leroy Higgings, Nileshwar Chaudary, Christopher McVey, J. Potter
{"title":"Multiple Beam Power Grid Tubes for High Frequency and High Power Operation","authors":"L. Ives, M. Read, T. Bui, D. Marsden, G. Collins, T. Habermann, R. Ho, T. Cox, Leroy Higgings, Nileshwar Chaudary, Christopher McVey, J. Potter","doi":"10.1109/IVEC45766.2020.9520557","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520557","url":null,"abstract":"High power, high efficiency RF sources are required at frequencies below 700 MHz for ion and proton accelerators. These sources are also used for high energy accelerators, such as the Advanced Photon Source, which is seeking 350 MHz RF sources producing more than 200 kW of continuous power. The program is developing multiple beam triodes capable of providing this RF power at efficiencies exceeding 80%. The sources would be extremely compact and low cost. Both the triodes and the associated RF cavities are being developed.","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":"126524562","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
Experimental Demonstration of a W-band Photonic Bandgap Klystron w波段光子带隙速调管的实验演示
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520451
J. Stephens, G. Rosenzweig, J. Tucek, K. Kreischer, M. Shapiro, R. Temkin
{"title":"Experimental Demonstration of a W-band Photonic Bandgap Klystron","authors":"J. Stephens, G. Rosenzweig, J. Tucek, K. Kreischer, M. Shapiro, R. Temkin","doi":"10.1109/IVEC45766.2020.9520451","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520451","url":null,"abstract":"This paper details recent progress on the experimental demonstration of a W-band klystron amplifier completed at the MIT. The amplifier utilizes a square lattice photonic bandgap (PBG) structure that permits the use of a highly oversized beam tunnel of diameter ~λ/4. Cold test measurements of the PBG klystron cavities revealed successful fabrication of the device. In hot test, a small-signal gain of 26 dB was measured at 93.7 GHz, with a saturated output power of 30 W.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"62 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":"122005406","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
Two-Color Laser Induced Electron Emission from Biased Metal Surface 偏置金属表面的双色激光诱导电子发射
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520490
Yi-man Luo, Peng Zhang
{"title":"Two-Color Laser Induced Electron Emission from Biased Metal Surface","authors":"Yi-man Luo, Peng Zhang","doi":"10.1109/IVEC45766.2020.9520490","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520490","url":null,"abstract":"By solving the time-dependent Schrödinger equation, we construct an exact analytical solution for nonlinear ultrafast electron emission from a dc-biased metal surface illuminated by two-color laser fields. Our results show a large dc bias can significantly increase the photoemission current, while maintaining a strong current modulation with respect to the phase delay of the two-color lasers. Application of our model to time-resolved photoelectron spectroscopy shows the dynamics of n-photon exited states depends strongly on the dc field.","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":"115823616","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
3D Meander Line Slow Wave Structure for W-band TWT w波段行波管三维弯曲线慢波结构
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520530
Juan M. Socuéllamos, R. Letizia, R. Dionisio, C. Paoloni
{"title":"3D Meander Line Slow Wave Structure for W-band TWT","authors":"Juan M. Socuéllamos, R. Letizia, R. Dionisio, C. Paoloni","doi":"10.1109/IVEC45766.2020.9520530","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520530","url":null,"abstract":"Planar meander lines have been recently studied in detail due to their favorable properties as slow wave structures for traveling wave tubes. However, the interaction of a cylindrical electron beam with this kind of structures is not efficient enough in order to achieve the output power levels required for space applications at W-band. A new design, suitable and optimized for the cylindrical beam geometry, is introduced in this work. Cold and large signal results are presented in the paper.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"285 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":"131936472","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 on a 100 kW-level Gyrotron Operating at 30 GHz 工作频率为30ghz的100 kw级回旋加速器的设计
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520449
Yanyan Zhang, Qiao Liu, Rutai Chen, Lina Wang, Zhipeng Wang
{"title":"Design on a 100 kW-level Gyrotron Operating at 30 GHz","authors":"Yanyan Zhang, Qiao Liu, Rutai Chen, Lina Wang, Zhipeng Wang","doi":"10.1109/IVEC45766.2020.9520449","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520449","url":null,"abstract":"in this paper, we present a design on a 30 GHz 100 kW-level gyrotron. The cold-cavity of the gyrotron has been studied by using an in-house gyrotron simulation code and CST microwave studio, respectively. Meanwhile, in the hot-cavity analyses, the behavior of multi-mode beam-wave interaction has been studied in detail by using PIC simulation with the help of CST particle studio. The results present that the gyrotron can operate at TE0.3 mode stably with the output power of 150 kW under the operating conditions: beam voltage of 50 kV, beam current of 10 A, magnetic field of 1.14 T, and pitch factor of 1.3.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"96 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":"132555639","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
Stability Analysis of VE Amplifiers Based on Determinant Equations 基于行列式方程的VE放大器稳定性分析
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520465
V. Jabotinski, T. Antonsen, A. Vlasov, I. Chernyavskiy
{"title":"Stability Analysis of VE Amplifiers Based on Determinant Equations","authors":"V. Jabotinski, T. Antonsen, A. Vlasov, I. Chernyavskiy","doi":"10.1109/IVEC45766.2020.9520465","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520465","url":null,"abstract":"A general method for calculating self-excitation thresholds for a large class of standing and traveling wave structures used in klystrons, traveling wave tubes, and other vacuum-electronic devices is presented. We determine circuit parameters of RF structures that are changed due to the presence of electron beam, and analyze stability of the obtained matrices. Determinant equations defined by such stability matrices are derived. The use of the method for structures with round and arbitrary geometry beam tunnels is discussed. Analytical stability evaluation described here greatly complements the large signal beam-wave interaction CHRISTINE and TESLA family codes as well as EM PIC codes such as NEPTUNE.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"23 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":"130240621","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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