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

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An Improved Design for High-power Coaxial-cavity Gyrotron with Misaligned Insert 一种改进的高功率同轴腔错位插入回旋管设计
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520476
Shan Zhang, Q. Xue
{"title":"An Improved Design for High-power Coaxial-cavity Gyrotron with Misaligned Insert","authors":"Shan Zhang, Q. Xue","doi":"10.1109/IVEC45766.2020.9520476","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520476","url":null,"abstract":"The misalignment of insert would cause frequency shift, decrease in interaction efficiency and uneven ohmic loss distribution on the cavity walls which would affect the long pulse of gyrotron. The structure of gyrotron cavity has been optimized in our recent study to reduce the effect of misaligned insert. As the misaligned distance increases, the effects become larger. In this paper, the dependence of output characters on guiding center radius is investigated and an optimal guiding center radius is chosen to reduce the effect of misaligned insert.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"95 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":"134073892","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
Modeling Stability of Vacuum Electronic Devices With the Large-Signal Code TESLA-Z 用大信号码TESLA-Z对真空电子器件的稳定性建模
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520479
I. Chernyavskiy, T. Antonsen, A. Vlasov, J. Rodgers, B. Levush
{"title":"Modeling Stability of Vacuum Electronic Devices With the Large-Signal Code TESLA-Z","authors":"I. Chernyavskiy, T. Antonsen, A. Vlasov, J. Rodgers, B. Levush","doi":"10.1109/IVEC45766.2020.9520479","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520479","url":null,"abstract":"We present a new approach to the study of the stability of Vacuum Electronic devices using the large-signal code TESLA-Z. The approach combines a precomputed complex impedance matrix for the structure Z with a TESLA computed admittance matrix Y of the beam-tunnel loaded with an electron beam. The gain matrix G for a given device then can be found as the product of the Z-matrix of the structure and admittance matrix Y of the beam-tunnel. Subsequent analysis of the eigenvalues of the gain-matrix G uses the Nyquist method to determine the stability of the device. We discuss details of the new algorithms and illustrate its application using available examples.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"33 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":"129383655","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
Analysis on Resonant Cavities of 231GHz EIA with Trapezoid Subwavelength Holes 带有梯形亚波长孔的231GHz EIA谐振腔分析
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520631
Yu Ji, Zongjun Shi, Ziqiang Yang, F. Lan
{"title":"Analysis on Resonant Cavities of 231GHz EIA with Trapezoid Subwavelength Holes","authors":"Yu Ji, Zongjun Shi, Ziqiang Yang, F. Lan","doi":"10.1109/IVEC45766.2020.9520631","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520631","url":null,"abstract":"A novel resonant cavity of extended interaction amplifier (EIA) is designed, combined with a double-grating structure and trapezoid subwavelength holes array structure. The resonant cavity is analyzed when operating at the TM31-2π mode in millimeter-wave band. The electric field distributions, dispersion, Q, and R/Q characteristics are simulated with the different parameter trapezoid subwavelength holes. Compared to the EIA which adopts the resonant cavity with rectangular holes, the one with trapezoid-hole resonant cavity may have a higher gain and wider bandwidth.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"99 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":"133521718","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
Analysis of High Frequency Characteristics for a Meander Line Slow-wave Structure 曲线慢波结构高频特性分析
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520615
Zheng Wen, Jirun Luo, Yu Fan, Chen Yang, Fang Zhu, Mingkui Zhu, Wei Guo, Y. Gong, Jinjun Feng
{"title":"Analysis of High Frequency Characteristics for a Meander Line Slow-wave Structure","authors":"Zheng Wen, Jirun Luo, Yu Fan, Chen Yang, Fang Zhu, Mingkui Zhu, Wei Guo, Y. Gong, Jinjun Feng","doi":"10.1109/IVEC45766.2020.9520615","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520615","url":null,"abstract":"Analysis of high frequency characteristics for a meander line slow-wave structure (ML-SWS) has been carried out by field-matching methods with the dyadic Green’s function. The effect from thickness of the meander line was considered and the theoretical results had been compared with the simulation ones.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"14 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":"133275028","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 Ka-Band High-Power TWT ka波段大功率行波管的设计
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520498
Zhixin Yang, Qi Wang, Zugen Guo, Rujing Ji, Y. Gong, H. Gong
{"title":"Design of Ka-Band High-Power TWT","authors":"Zhixin Yang, Qi Wang, Zugen Guo, Rujing Ji, Y. Gong, H. Gong","doi":"10.1109/IVEC45766.2020.9520498","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520498","url":null,"abstract":"A Ka-band traveling wave tube (TWT) with an output power above 5kw, an electronic efficiency above 10% in the bandwidth of 33–37GHz was designed. The structure of slow wave adopts folded waveguide. The folded waveguide TWT has a saturated gain of 43.5dB, peak power of 6.7kW and electronic efficiency of 10.54% at 35GHz. We also have designed the electronic optical system, simulation results show the electron gun voltage is 28Kv, and transmitted beam current is 2.54A.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"14 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":"133320636","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
Additive Manufacture of RF Loads for ITER ITER射频载荷的增材制造
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520466
L. Ives, T. Bui, D. Marsden, Geroge Collins, Tim Horn, C. Ledford, J. Neilson
{"title":"Additive Manufacture of RF Loads for ITER","authors":"L. Ives, T. Bui, D. Marsden, Geroge Collins, Tim Horn, C. Ledford, J. Neilson","doi":"10.1109/IVEC45766.2020.9520466","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520466","url":null,"abstract":"The ITER fusion research facility will employ twenty-four, MW-class gyrotrons for electron cyclotron heating of the fusion plasma. Each of these gyrotron will require an RF load for commissioning and periodic maintenance and testing. These loads must dissipate approximately 1 MW of long pulse / continuous RF power with less than 0.5% of the power reflected back into the transmission line. This program is using additive manufacturing to reduce the cost and improve the performance.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"271 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":"133822718","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
Power and Efficiency Enhancement of the Reltron Using Dual RF Output Cavities 利用双射频输出腔增强Reltron的功率和效率
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520627
Garima Dubey, Manpuran Mahto, P. Jain
{"title":"Power and Efficiency Enhancement of the Reltron Using Dual RF Output Cavities","authors":"Garima Dubey, Manpuran Mahto, P. Jain","doi":"10.1109/IVEC45766.2020.9520627","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520627","url":null,"abstract":"In this paper, a dual RF output cavity based reltron is proposed to enhance the efficiency as well RF output power. It uses two RF output cavities of different quality factor. The quality factor of the first output cavity kept low whereas the quality factor of the second output cavity is kept higher. The output cavity with low quality factor extracts maximum RF output power whereas the second output cavity with has higher quality factor extracts remaining output power. With typically selected electrical parameters, the proposed reltron delivers ~ 270 MW output power with ~ 42.4% efficiency. The obtained results show the improvement in the device performance in terms of RF output power as well as efficiency as compared to the conventional reltron.","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":"115699399","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 Demonstration of a W-Band Sheet Beam Klystron w波段片束速调管的实验演示
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520555
Ding Zhao, W. Gu, Qingsheng Li, Shuzhong Wang, Zhi-qiang Zhang
{"title":"Experimental Demonstration of a W-Band Sheet Beam Klystron","authors":"Ding Zhao, W. Gu, Qingsheng Li, Shuzhong Wang, Zhi-qiang Zhang","doi":"10.1109/IVEC45766.2020.9520555","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520555","url":null,"abstract":"As an important proof experiment for further developing a compact sheet beam klystron with the multicavity, multi-gap interaction circuit, we have designed and built a uniform magnetic focusing prototype tube, where a simulated 55 kV, 2.2 A sheet beam transports an interaction length of about 100 mm. A water-cooled solenoid is used to produce the field with a maximum value of 4,000 Gauss. To improve the characteristic impedance and efficiency, the HF circuit is composed of four multi-gap cavities, and each cavity includes a multi-layered membrane to finely tune its working frequency. Meanwhile, to simplify the structure, a single-port scheme is applied in the input and output cavities, the adverse influence of which on the field uniformity is reduced to a minimum level. The latest hot test shows the maximum output power attains to 2.57 kW at 95.025 GHz and the bandwidth is about 100 MHz when the output is over 1 kW. The self-oscillation has not been observed in this experiment.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"68 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":"124291083","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
Design and Modeling of a Microwave Plasma Enhanced Chemical Vapor Deposition System at 2.45 GHz 2.45 GHz微波等离子体增强化学气相沉积系统的设计与建模
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520464
Yilang Jiang, Kaviya Aranganadin, H. Hsu, Ming-Chieh Lin
{"title":"Design and Modeling of a Microwave Plasma Enhanced Chemical Vapor Deposition System at 2.45 GHz","authors":"Yilang Jiang, Kaviya Aranganadin, H. Hsu, Ming-Chieh Lin","doi":"10.1109/IVEC45766.2020.9520464","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520464","url":null,"abstract":"Solid thin films developed by a microwave plasma-enhanced chemical vapor deposition (MPECVD) system have excellent electrical properties, good substrate adhesion, and excellent step coverage. Due to these advantages, MPECVD films have been widely used in very large-scale integrated circuit technology, optoelectronic devices, MEMS, and other fields. The MPECVD method is one of the promising candidates for synthetic CNTs due to low temperature and large area growth. Recently, this technique has gained popularity in graphene and diamond film fabrication. This paper discusses the design of an MPECVD chamber operated at 2.45 GHz of frequency using a finite element method simulation. The design consists of a coaxial waveguide and a cylindrical chamber at the center connected using 4 identical slots in each direction. For the magnetic coupling, slots placed at the bottom of the central cavity. TM011 mode in the inner chamber is employed to generate the plasma at 2.45GHz. In addition, we consider the effects of input power and gas pressure on plasma density.","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":"124411660","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 Internal Temperature Prediction of Slow Wave Structure Based on Experimental Data 基于实验数据的慢波结构内部温度预测研究
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC) Pub Date : 2020-10-19 DOI: 10.1109/IVEC45766.2020.9520588
Xingqun Zhao, Xiaoting Ying, Xiaohan Sun
{"title":"Research on Internal Temperature Prediction of Slow Wave Structure Based on Experimental Data","authors":"Xingqun Zhao, Xiaoting Ying, Xiaohan Sun","doi":"10.1109/IVEC45766.2020.9520588","DOIUrl":"https://doi.org/10.1109/IVEC45766.2020.9520588","url":null,"abstract":"At present, there are many researches on the thermal characteristics of traveling wave tube, but few researches and discussions on the measurement of its internal temperature field are involved. Moreover, it is difficult to monitor the internal temperature of traveling wave tube. In related research, an RBF neural network model based on ANSYS slow wave structure simulation data has been proposed. Data outside the slow wave structure is input into the model to calculate its internal thermal characteristics. On this basis, a simplified model of slow wave structure was designed in this study. The real data outside the model tube measured by the infrared temperature measurement system was input into the inversion model to get the internal temperature, and the error is small compared with the real internal temperature.","PeriodicalId":170853,"journal":{"name":"2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)","volume":"17 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":"123417425","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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