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2007 IEEE International Vacuum Electronics Conference最新文献

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Space-Charge-Limited Current in Quantum Regime by Solving the Schrödinger-Poisson Equation Based on Finite Element Method 基于有限元法求解Schrödinger-Poisson方程的量子态空间电荷限制电流
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283366
Chieh Chang, Ming-Chieh Lin
{"title":"Space-Charge-Limited Current in Quantum Regime by Solving the Schrödinger-Poisson Equation Based on Finite Element Method","authors":"Chieh Chang, Ming-Chieh Lin","doi":"10.1109/IVELEC.2007.4283366","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283366","url":null,"abstract":"The Child-Langmuir law gives the maximum electron current, known as the space-charge- limited current. In a previous work of Lau et ah, they extended the classical work of Child and Langmuir to the quantum regime by using the Wentzel-Kramers-Brillouin-Jefferys method. Here, we quantitatively investigate the space-charge-limited current in quantum regime by solving the Schrodinger-Poisson equation based on finite element method.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122100292","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 Study on X-band Relativistic Backward Wave Oscillator (RBWO) x波段相对论后向波振荡器(RBWO)的实验研究
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283296
S. Min, H. Jung, S. Shin, G. Park
{"title":"Experimental Study on X-band Relativistic Backward Wave Oscillator (RBWO)","authors":"S. Min, H. Jung, S. Shin, G. Park","doi":"10.1109/IVELEC.2007.4283296","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283296","url":null,"abstract":"A Relativistic backward wave oscillator (RBWO) is a reliable source of a high power electromagnetic wave (HPEM). The RBWO is capable of high efficiency by a relatively long interaction region between a backward wave and an electron beam. But the pulse shortening problem occurs frequently in experiments of RBWO because of the mode competition, the RF breakdown and so on. After this mode competition between axial modes of TM01, the RF power is vanished. There also occurs a mode competition between TM01 and TM02 when the radii of the hollow electron beam are smaller than a critical value. Mode competition which is one of the main causes of pulse shortening is found to be very sensitive to the position of the electron beam in this RBWO device. Experimental study is done on 100MW RBWO and in progress on X-band hundreds MWRBWO.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129149570","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
Secondary emission property of CeO2-Y2O3-Mo cathode CeO2-Y2O3-Mo阴极的二次发射性能
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283273
Jinshu Wang, W. Liu, Fei Gao, Yiman Wang, Meiling Zhou
{"title":"Secondary emission property of CeO2-Y2O3-Mo cathode","authors":"Jinshu Wang, W. Liu, Fei Gao, Yiman Wang, Meiling Zhou","doi":"10.1109/IVELEC.2007.4283273","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283273","url":null,"abstract":"Secondary emission has been used in many fields stimulated by the development of vacuum electronic technology, especially in the field of high power magnetron. The development of high power magnetron needs cathodes which could provide high secondary emission yield (Vasilyva, 1996). As a novel cathode which is expected to be applied in magnetron, CeO2-Y2O3-Mo cermet cathode has be prepared by liquid-liquid doping combined with a fast sintering, spark plasma sintering technique.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"301 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129635960","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
Compression of frequency-modulated pulses from a relativistic BWO up to multigigawatt powers 压缩频率调制脉冲从一个相对论BWO到千兆瓦的功率
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283299
G. Denisov, V. Bratman, N. G. Kolganov, S. Samsonov
{"title":"Compression of frequency-modulated pulses from a relativistic BWO up to multigigawatt powers","authors":"G. Denisov, V. Bratman, N. G. Kolganov, S. Samsonov","doi":"10.1109/IVELEC.2007.4283299","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283299","url":null,"abstract":"The theoretical analysis and proof-of-principle experiments at kilowatt power levels showed that X-band radiation of 50-70 ns duration with 3-5% frequency modulation can be compressed into 1-3 ns pulses having 10-30 times higher peak power. This region of operating parameters in conjunction with low reflection and high RF electric strength makes the helical waveguide compressor attractive for increasing the peak power from relativistic non-resonant electron devices such as BWOs and TWTs up to the multigigawatt level.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123932232","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
Accurate Measurements of the Dielectric Properties of TWT BeO Support Rods 行波管BeO支撑杆介电性能的精确测量
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283215
Y. Goren, A. Schram, D. Gagne, C. Jensen
{"title":"Accurate Measurements of the Dielectric Properties of TWT BeO Support Rods","authors":"Y. Goren, A. Schram, D. Gagne, C. Jensen","doi":"10.1109/IVELEC.2007.4283215","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283215","url":null,"abstract":"Accurate measurement of the electrical properties of the TWT dielectric support rods is imperative in the design of a new generation of millimeter and sub-millimeter wave TWTs. Moreover, this capability is of outmost important for a consistent high yield in manufacturing of those tubes. This paper describes a method of combining a resonance cavity with a 3D electromagnetic code to measure the dielectric properties of TWT BeO rods just before being inserted into the tube.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"385 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114088045","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
Experiment on Microwave Rocket using a High Power Gyrotron 大功率回旋管在微波火箭上的实验
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283401
Y. Oda, K. Komurasaki, K. Takahashi, A. Kasugai, K. Sakamoto
{"title":"Experiment on Microwave Rocket using a High Power Gyrotron","authors":"Y. Oda, K. Komurasaki, K. Takahashi, A. Kasugai, K. Sakamoto","doi":"10.1109/IVELEC.2007.4283401","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283401","url":null,"abstract":"Microwave rocket is new application of atmospheric discharge in a high power millimeter-wave beam. An ionization front of plasma in a high power microwave beam propagates towards a radiation source absorbing microwave power. During its propagation, a shock wave is formed. A shock wave produces impulsive force. In microwave rocket repetitive millimeter-wave pulses generate propulsive thrust. This kind of propulsion system is called beamed energy propulsion (BEP). Because propulsive energy is provided from the beam source equipped on the ground, it is free from on-board energy sources. For that reason, it is expected to achieve a higher payload ratio than conventional chemical rockets. In this study, estimation of thrust using a thrust generation model was conducted.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116185728","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
Sheet-Beam 90 GHz and 220 GHz Extend-Interaction-Klystron Designs 板波束90 GHz和220 GHz扩展交互速调管设计
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283282
K. Nguyen, D. Pershing, E. Wright, J. Pasour, J. Calame, L. Ludeking, J. Rodgers, J. Petillo
{"title":"Sheet-Beam 90 GHz and 220 GHz Extend-Interaction-Klystron Designs","authors":"K. Nguyen, D. Pershing, E. Wright, J. Pasour, J. Calame, L. Ludeking, J. Rodgers, J. Petillo","doi":"10.1109/IVELEC.2007.4283282","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283282","url":null,"abstract":"Circuit designs for 91 GHz and 220-GHz sheet-beam extended-interaction klystrons (EIKs) are presented. The W-band circuit employs a relatively simple two-cavity configuration to demonstrate beam transport and high peak power RF generation, which will serve as the basis for future scaling to higher gain and frequencies. Uniform (solenoidal) magnetic focusing is employed in both cases. Simulations with MAGIC-3D indicate peak RF powers of 10.5 kW and >400 W are feasible with a 3 A, 19.5 kV beam and a 0.5 A, 16.5 kV beam at 91 GHz and 220 GHz, respectively. Proof of principle experimental demonstrations are planned.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124189072","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: 37
Design of the confined flow multiple beam guns with a compression for L and X-band powerful klystrons. L波段和x波段强速调管的压缩流多束枪设计。
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283375
A. Larionov, S. Fukuda
{"title":"Design of the confined flow multiple beam guns with a compression for L and X-band powerful klystrons.","authors":"A. Larionov, S. Fukuda","doi":"10.1109/IVELEC.2007.4283375","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283375","url":null,"abstract":"In this work the gun design is represented that provides a multiple beam compression on the radius twice and subsequent multiple beam focusing in the 1.5-2 Brillouin fields. The formed multiple beam has a ring structure and consists of 24 individual beamlets.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126294703","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
The Education, Research and Development of Microwave Electronics and Microwave Tubes in China 中国微波电子学与微波管的教育、研究与发展
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283198
Yao-gen Ding, Pukun Liu, Xiao-bao Su, Yong Wang, Zhaozhuan Zhang
{"title":"The Education, Research and Development of Microwave Electronics and Microwave Tubes in China","authors":"Yao-gen Ding, Pukun Liu, Xiao-bao Su, Yong Wang, Zhaozhuan Zhang","doi":"10.1109/IVELEC.2007.4283198","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283198","url":null,"abstract":"The paper gives an overview of the education and research and development of microwave electronics and microwave tube in China. A brief historic account of these technologies is also provided.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132358800","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
Simulation of 2-section SWS for high gain, high efficiency helix TWT 高增益、高效率螺旋行波管的两段SWS仿真
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283392
V. Srivastava, M. Maria, A. Bera, R.R. Singh, P. V. Bhaskar, V. Kiran
{"title":"Simulation of 2-section SWS for high gain, high efficiency helix TWT","authors":"V. Srivastava, M. Maria, A. Bera, R.R. Singh, P. V. Bhaskar, V. Kiran","doi":"10.1109/IVELEC.2007.4283392","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283392","url":null,"abstract":"A high efficiency 140W radiation-cooled Ku-band TWT has been designed successfully for communication satellite. This TWT with input coaxial coupler and output waveguide coupler was designed in 2-sections to achieve gain >55dB at MOW output power over the frequency range of 10.9-11.7GHz with high stability and high linearity.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130949993","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
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