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2015 IEEE International Vacuum Electronics Conference (IVEC)最新文献

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Multi-frequency operation of DEMO gyrotron with realistic electron beam parameters 实际电子束参数下DEMO回旋管的多频工作
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223769
P. Kalaria, K. Avramidis, J. Franck, S. Illy, I. Pagonakis, M. Thumm, J. Jelonnek
{"title":"Multi-frequency operation of DEMO gyrotron with realistic electron beam parameters","authors":"P. Kalaria, K. Avramidis, J. Franck, S. Illy, I. Pagonakis, M. Thumm, J. Jelonnek","doi":"10.1109/IVEC.2015.7223769","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223769","url":null,"abstract":"Along with high power and high efficiency operation around 240 GHz, the requirements of DEMO gyrotrons include the possibility of multi-frequency operation and fast frequency tunability in 2-3 GHz steps. In this paper, multi-frequency operation of a proposed design for a conventional cavity DEMO gyrotron is presented, including operating parameters at different frequencies. The performance of the gyrotron is simulated considering realistic electron beam parameters.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129592112","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: 11
Study of a THz spatial harmonic magnetron 太赫兹空间谐波磁控管的研究
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223804
Jiandong Lang, Xiang Li, Y. Alfadhl, Xiao-dong Chen
{"title":"Study of a THz spatial harmonic magnetron","authors":"Jiandong Lang, Xiang Li, Y. Alfadhl, Xiao-dong Chen","doi":"10.1109/IVEC.2015.7223804","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223804","url":null,"abstract":"This paper presents our study on a 0.2-THz spatial harmonic magnetron with 3D particle simulation model and cold cavity testing. The magnetron is operated on first order backward spatial harmonic of a π/2-1 mode. The saturated output power is predicted at 2.8 kW with 13.6 kV anode voltage and 0.944 T magnetic field.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132430977","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: 4
A D-band backward-wave oscillator based on quasi-parallel-plate slow-wave structure 基于准平行板慢波结构的d波段后向波振荡器
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223956
Minghao Zhang, Yanyu Wei, Lingna Yue, Xianbao Shi, Yuanyuan Wang, Wanghe Wei, Chong Ding, Jin Xu, Xianfeng Tang, G. Zhao, Z. Duan, Y. Gong, Wenxiang Wang
{"title":"A D-band backward-wave oscillator based on quasi-parallel-plate slow-wave structure","authors":"Minghao Zhang, Yanyu Wei, Lingna Yue, Xianbao Shi, Yuanyuan Wang, Wanghe Wei, Chong Ding, Jin Xu, Xianfeng Tang, G. Zhao, Z. Duan, Y. Gong, Wenxiang Wang","doi":"10.1109/IVEC.2015.7223956","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223956","url":null,"abstract":"A backward-wave oscillator (BWO) based on quasi-parallel-plate (QPP) slow-wave structure (SWS) is investigated. The high-frequency characteristics of the SWS are calculated, and the performance of the BWO is predicted through particle-in-cell method. By utilizing wire-EDM technique, the QPP SWS is fabricated. The preliminary experimental results are reported in this paper.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130234877","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: 5
Space-charge limited density of consecutively injected electron pulses with uniform separation 均匀分离连续注入电子脉冲的空间电荷限制密度
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223778
Y. Liu, Peng Zhang, Shih-Hung Chen, L. Ang
{"title":"Space-charge limited density of consecutively injected electron pulses with uniform separation","authors":"Y. Liu, Peng Zhang, Shih-Hung Chen, L. Ang","doi":"10.1109/IVEC.2015.7223778","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223778","url":null,"abstract":"A one-dimensional model to study the space-charge limited density injection of a train of multiple electron pulse into a diode is presented. It is found that there is a maximal value of charge density per pulse for N number of pulse of equal time separation that can be injected. By comparing with numerical solutions, we obtain an analytical formula, which can quickly provide such upper limit of charge density injection once the values of gap spacing, gap voltage and the initial time separation between the pulses are provided. The model has been verified with the numerical solutions of the equation of motion up to a few MeV of beam energy for which the relativistic effect is included. This work should be useful in the design of multiple pulses of electron guns in the application of ultra-fast electron microscopy or free electron lasers.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130484516","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
Investigation of the high performance Nickel-matrix Oxide cathode 高性能镍基氧化物阴极的研究
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224007
Zhiqiang Yu, Na Li, Liling Han, Haiyan Ren, Wensheng Shao, Ji Li
{"title":"Investigation of the high performance Nickel-matrix Oxide cathode","authors":"Zhiqiang Yu, Na Li, Liling Han, Haiyan Ren, Wensheng Shao, Ji Li","doi":"10.1109/IVEC.2015.7224007","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224007","url":null,"abstract":"This paper introduces the investigation of high performance Nickel-Oxide cathode for high powerw with long pulse. The authors also discuss the key factors affecting the performance of cathode, including the cathode surface, porosity of Nickel matrix, and distribution of temperature, etc. the authors employ the special mould to change the density and roughness of cathode surface. Finally, the magnetron assembling the cathode has stable performance.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125343116","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 wideband planar helix slow-wave structure for millimeter-wave TWTs 毫米波行波管的宽带平面螺旋慢波结构
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223748
Chengxi Zhao, S. Aditya, Shaomeng Wang, C. Chua
{"title":"A wideband planar helix slow-wave structure for millimeter-wave TWTs","authors":"Chengxi Zhao, S. Aditya, Shaomeng Wang, C. Chua","doi":"10.1109/IVEC.2015.7223748","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223748","url":null,"abstract":"A wideband design of a slow-wave structure (SWS) consisting of planar helix with straight edge connections is proposed here. Dispersion is reduced by placing the metal shield close to the SWS, by including ground planes, and by reducing the amount of dielectric material. The design leads to an octave bandwidth centered at 30 GHz for the `cold' SWS. The design can be implemented using microfabrication techniques. For a design with 150 periods and a 3750 V, 10 mA electron beam, a small-signal gain of 36 dB and a saturated output power of 6.65 W is predicted at 30 GHz. The design approach appears promising for wideband millimeter-wave traveling tubes.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"27 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123214396","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: 8
Design of output structures for a W-band sheet beam travelling wave tube w波段板束行波管输出结构设计
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223843
L. Y. Yang, J. X. Wang, G. Liu, G. Shu, Y. Zheng, K. Dong, Y. Luo
{"title":"Design of output structures for a W-band sheet beam travelling wave tube","authors":"L. Y. Yang, J. X. Wang, G. Liu, G. Shu, Y. Zheng, K. Dong, Y. Luo","doi":"10.1109/IVEC.2015.7223843","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223843","url":null,"abstract":"Two output structures constructed by multiple apertures in E-and H-planes were designed for a W-band broadband sheet beam traveling wave tube (TWT). E-plane coupler can achieve 32% relative bandwidth and perform excellent port isolation. In comparison, another output coupler built by multi-aperture in H-plane was demonstrated, which is much convenient for PCM focusing system and can be easily integrated with a more compact dimension. Both of the couplers show excellent performance of broadband operation, low reflection and high transmission.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115278546","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
Study of side-band emission in magnetron injection gun of gyro-TWT 陀螺行波管磁控管注射枪的边带发射研究
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7223926
R. Yan, Wei Jiang, Yong Luo
{"title":"Study of side-band emission in magnetron injection gun of gyro-TWT","authors":"R. Yan, Wei Jiang, Yong Luo","doi":"10.1109/IVEC.2015.7223926","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7223926","url":null,"abstract":"Magnetron injection gun (MIG) in gyrotrons is used to produce the gyrating electron-beam to interact with the high frequency field. The performance of the tube are mainly related to the quality of the electron-beam, but the side-band cathode emission degenerate the performance of MIG. This paper demonstrated the causes of side-band emission, and a validated experiment was carried out. The side-band emission was observed and some corresponding improvements in experiment to suppress the emission were proposed.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116691514","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
Progress of G band folded waveguide TWT G波段折叠波导行波管的研究进展
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224054
P. Pan, Y. Hu, Mengchao Gao, Hanyan Li, Lili Li, Yinghua Du, Ruitong Dong, Shijing Li, Xiaoqing Zhang, Ji Chen, Jun Cai, Xianping Wu, Jinjun Feng
{"title":"Progress of G band folded waveguide TWT","authors":"P. Pan, Y. Hu, Mengchao Gao, Hanyan Li, Lili Li, Yinghua Du, Ruitong Dong, Shijing Li, Xiaoqing Zhang, Ji Chen, Jun Cai, Xianping Wu, Jinjun Feng","doi":"10.1109/IVEC.2015.7224054","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224054","url":null,"abstract":"A folded waveguide traveling-wave tube (TWT) with PPM system operating at 220 GHz with 10 W of output power and 10 GHz bandwidth is being developed. This paper reports the status of fabrication and test.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123744201","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: 6
Carbon nanotube magnetron injection electron gun for a 0.22THz gyrotron 用于0.22太赫兹回旋管的碳纳米管磁控管注入电子枪
2015 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2015-04-27 DOI: 10.1109/IVEC.2015.7224004
Xuesong Yuan, Yu Zhang, Yang Yan, Xiaoyun Li, Jianqiang Wu, S. Deng
{"title":"Carbon nanotube magnetron injection electron gun for a 0.22THz gyrotron","authors":"Xuesong Yuan, Yu Zhang, Yang Yan, Xiaoyun Li, Jianqiang Wu, S. Deng","doi":"10.1109/IVEC.2015.7224004","DOIUrl":"https://doi.org/10.1109/IVEC.2015.7224004","url":null,"abstract":"A magnetron injection electron gun based on carbon nanotube cold cathode is developed in this paper, which is designed for a 0.22THz TE03 mode gyrotron. The experimental results of electron gun show that the maximum beam current reaches 30mA and an average radius of 1.2mm beam spot are achieved by using ITO glass. And the beam current density is increased 100 times.","PeriodicalId":435469,"journal":{"name":"2015 IEEE International Vacuum Electronics Conference (IVEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122609423","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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