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

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Electron Beam Melting of Pure Copper – From Research to Industrialization 纯铜的电子束熔化——从研究到工业化
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520506
R. Guschlbauer, Pär Arumskog, S. Eichler
{"title":"Electron Beam Melting of Pure Copper – From Research to Industrialization","authors":"R. Guschlbauer, Pär Arumskog, S. Eichler","doi":"10.1109/IVEC45766.2020.9520506","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520506","url":null,"abstract":"The Additive Manufacturing technology Electron Beam Melting shows high potential in processing pure copper for high conductivity applications. Pure copper powder was consolidated, and process parameters were optimized. It is feasible to manufacture components with a relative density >99.5 %, an electrical conductivity >57 MS/m, an ultimate tensile strength >175 MPa and with an elongation at fraction of >35 %. With those physical properties, high performance applications like heat exchangers, induction coils and electrification components can be additively manufactured with EBM.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"40 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":"127255174","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
Environments Adaptability and Failure Analysis of Nanoscale Vacuum Channel Transistors 纳米真空通道晶体管的环境适应性与失效分析
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520635
Xinghui Li, P. Han, Yunzhu Xie, Ting Du, Jun Cai, Jinjun Feng
{"title":"Environments Adaptability and Failure Analysis of Nanoscale Vacuum Channel Transistors","authors":"Xinghui Li, P. Han, Yunzhu Xie, Ting Du, Jun Cai, Jinjun Feng","doi":"10.1109/IVEC45766.2020.9520635","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520635","url":null,"abstract":"Metal-emitter-based nanoscale vacuum channel transistors with vertical surround-gate configuration were fabricated by using thin-film deposition and focus ion beam etching. Adaptability testing in different vacuum environments and failure analysis of the transistors were carried out to make the basis for stability enhancement and component performance improvement.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"53 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":"125950374","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 Low-Voltage Backward Wave Oscillator Operating at THz Band 工作在太赫兹波段的低压反向波振荡器
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520462
W. Shao, Duo Xu, Zhanliang Wang, H. Gong, T. Tang, Z. Duan, Zhigang Lu, Yanyu Wei, Y. Gong, Jinjun Feng
{"title":"A Low-Voltage Backward Wave Oscillator Operating at THz Band","authors":"W. Shao, Duo Xu, Zhanliang Wang, H. Gong, T. Tang, Z. Duan, Zhigang Lu, Yanyu Wei, Y. Gong, Jinjun Feng","doi":"10.1109/IVEC45766.2020.9520462","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520462","url":null,"abstract":"A low-voltage backward wave oscillator based on staggered double vane structure is designed in this paper and a novel straight-waveguide input/output coupler is also proposed. The high-frequency characteristics and transmission characteristics of the structure are calculated and the results of the circuit show that the reflection coefficient is below -10dB in the frequency range of 250-300GHz. The beam-wave interaction is also carried out and the output power is greater than 20mW within the frequency range of 290GHz to 300GHz, which the corresponding operating voltage is 3800V to 4500V. And a maximum output power of 2W is reached at 300GHz.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"49 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":"125414422","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
Efficient Regime of Hybrid Surface-Radiating Waves in a THz Clinotron 太赫兹回旋加速器中混合表面辐射波的有效状态
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520601
E. Khutoryan, S. Ponomarenko, S. Kishko, K. Lukin, Y. Tatematsu, S. Mitsudo, M. Tani, A. Kuleshov
{"title":"Efficient Regime of Hybrid Surface-Radiating Waves in a THz Clinotron","authors":"E. Khutoryan, S. Ponomarenko, S. Kishko, K. Lukin, Y. Tatematsu, S. Mitsudo, M. Tani, A. Kuleshov","doi":"10.1109/IVEC45766.2020.9520601","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520601","url":null,"abstract":"Peculiarities of a THz non-resonant clinotron in a regime of surface-radiating backward wave arising due to periodically modified grating have been presented. The simulation results demonstrate that the feedback and efficiency of the radiation output of the proposed regime is much higher in comparison with conventional surface wave clinotron in a THz range.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"16 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":"115013545","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
Mechanical Design Study for Gyrotron E×B Drift Two-Stage Depressed Collector 回旋管E×B漂移两级降压集热器机械设计研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520565
B. Ell, I. Pagonakis, Chuanren Wu, David Albert, G. Gantenbein, S. Illy, T. Kobarg, T. Rzesnicki, M. Thumm, J. Jelonnek
{"title":"Mechanical Design Study for Gyrotron E×B Drift Two-Stage Depressed Collector","authors":"B. Ell, I. Pagonakis, Chuanren Wu, David Albert, G. Gantenbein, S. Illy, T. Kobarg, T. Rzesnicki, M. Thumm, J. Jelonnek","doi":"10.1109/IVEC45766.2020.9520565","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520565","url":null,"abstract":"The key for a significant increase of the gyrotron efficiency is the development of an efficient multistage depressed collector (MDC) for the annular spent electron beam. During the past years, many different design approaches based on $E times mathrm{B}$ drift concept have been theoretically investigated at KIT. The next step towards the experimental validation of such an MDC is the development of a prototype. The complexity of the mechanical design of the MDC is strongly dependent on the size of the electrodes, the manufacturing possibilities of individual parts, the electric field distribution, etc. Considering all those factors, an MDC system has been optimized in order to significantly reduce the manufacturing complexity of the prototype. As a result, a significant smaller and simpler conceptual design for the MDC system is presented.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"178 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":"122875554","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
Effect of Noisy Input Signal and Electron Beam Velocity Nonuniform on Helix TWT Output Performance 噪声输入信号和电子束速度不均匀对螺旋行波管输出性能的影响
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520503
Changsheng Shen, Jin Zhang, Hehong Fan, Ningfeng Bai, Xiaohan Sun
{"title":"Effect of Noisy Input Signal and Electron Beam Velocity Nonuniform on Helix TWT Output Performance","authors":"Changsheng Shen, Jin Zhang, Hehong Fan, Ningfeng Bai, Xiaohan Sun","doi":"10.1109/IVEC45766.2020.9520503","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520503","url":null,"abstract":"Due to the complex electromagnetic environment in the helix TWT, the input signal is noisy, and the velocity magnitude and direction of electron beam from the electron gun to the slow wave structure are nonuniform. A simulation model for helix TWT output performance with different noisy input signal and velocity of electron beam is established and the results show that signal-to-noise ratio (SNR) of the output signal is affected by noisy input signal, the velocity magnitude and direction. SNR decreases obviously when signal-to-noise ratio of input signal decreases.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"103 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":"114273901","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 Studies of Quasi-Optical Mode Converter for 105 GHz High-Power Gyrotron 105ghz大功率回旋管准光模式转换器设计研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520522
D. Mondal, S. Yuvaraj, S. Adya, A. S. Thakur, M. Kartikeyan
{"title":"Design Studies of Quasi-Optical Mode Converter for 105 GHz High-Power Gyrotron","authors":"D. Mondal, S. Yuvaraj, S. Adya, A. S. Thakur, M. Kartikeyan","doi":"10.1109/IVEC45766.2020.9520522","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520522","url":null,"abstract":"In this paper, the design aspects of the quasi-optical launcher (QOL) and matching optics unit (MOU) are performed for 105 GHz gyrotron. After the interaction cavity and nonlinear taper section, high power RF wave with the cavity mode of ${mathrm {TE_{17,6}}}$ need to be converted to Gaussian like mode which can be obtained from a dimpled wall QOL. The Gaussian content of the converted beam is achieved by 99% using commercially available launcher optimization tool (LOT) & Surf3D. Besides, design of a matching optics unit (includes a set of phase correcting mirrors) is carried out using in-house code Gyrotron Design Studio (GDS.V.1.2019) to correct the phase of the off-axis Gaussian beam.","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":"129315193","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
Noble Gas Retention Effect on Klystron High Voltage Stability 惰性气体保留对速调管高压稳定性的影响
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520526
A. Cripps, M. Hyttinen, D. Yake, A. Moskvicheva
{"title":"Noble Gas Retention Effect on Klystron High Voltage Stability","authors":"A. Cripps, M. Hyttinen, D. Yake, A. Moskvicheva","doi":"10.1109/IVEC45766.2020.9520526","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520526","url":null,"abstract":"Several fielded klystrons experienced operational interruption due to sporadic arc events. Root cause analysis at CPI Canada revealed that VacIon pumps used to process these klystrons were saturated with nobble gases. Pressure bursts in pumping process indicated spontaneous release of gases back into the system. This process resulted in residual pressure of noble gases in the klystron. The cycle of adsorption and spontaneous release continued in the operating klystron resulting in sporadic high voltage arcing. This paper describes the details of root cause analysis and preventive actions.","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":"130395655","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
Compact and High-efficiency Metamaterial Extended Interaction Oscillator 紧凑高效的超材料扩展相互作用振荡器
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520528
Xin Wang, Hengyu Luo, Xuanming Zhang, T. Tang, Zhanliang Wang, H. Gong, Y. Gong, B. Basu, Z. Duan
{"title":"Compact and High-efficiency Metamaterial Extended Interaction Oscillator","authors":"Xin Wang, Hengyu Luo, Xuanming Zhang, T. Tang, Zhanliang Wang, H. Gong, Y. Gong, B. Basu, Z. Duan","doi":"10.1109/IVEC45766.2020.9520528","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520528","url":null,"abstract":"A highly efficient and compact metamaterial extended interaction oscillator (MEIO) is characterized and designed. The power exchange function of the multiple-gap extended interaction resonant cavity loading the proposed metamaterial is investigated for the π mode. Furthermore, the cavity diameter of 5-gap MEIO is only 37 mm at S-band. The CST PIC simulations show the peak output power of about 10 MW and the electronic efficiency up to 48% at 2.866 GHz when the beam voltage and current are 130 kV and 80 A, respectively, and the focusing magnetic field is 2000 G. The simulation results suggest that the proposed MEIO has the potential application in the future accelerators as an MW-level high-efficiency, miniaturized microwave source.","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":"130547389","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
A Study on Instabilities of 220 GHz Confocal Waveguide Gyro-TWT 220 GHz共聚焦波导陀螺行波管的不稳定性研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520575
Jie Yang, Shouxi Xu, Yong Wang, Xiaoyan Wang, Lianzheng Zhang
{"title":"A Study on Instabilities of 220 GHz Confocal Waveguide Gyro-TWT","authors":"Jie Yang, Shouxi Xu, Yong Wang, Xiaoyan Wang, Lianzheng Zhang","doi":"10.1109/IVEC45766.2020.9520575","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520575","url":null,"abstract":"Instability problem is one of the most significant limits for high power gyro-TWTs. In this paper, the absolute instabilities and backward wave oscillation (BWO) instabilities of a 220 GHz confocal waveguide gyro-TWT are discussed. The results show that the starting current of absolute instabilities is much higher than the operating current 5A, and the critical interaction length of HE05 mode backward wave oscillation is about 10mm.","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":"127044087","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
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