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2007 IEEE International Vacuum Electronics Conference最新文献

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170 GHz, 2 MW Coaxial Cavity Gyrotron - investigation of the parasitic oscillations and efficiency of the RF-output system -* 170 GHz, 2 MW同轴腔回旋管-射频输出系统寄生振荡和效率的研究-*
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283208
T. Rzesnicki, B. Piosczyk, G. Dammertz, G. Gantenbein, M. Thumm, G. Michel
{"title":"170 GHz, 2 MW Coaxial Cavity Gyrotron - investigation of the parasitic oscillations and efficiency of the RF-output system -*","authors":"T. Rzesnicki, B. Piosczyk, G. Dammertz, G. Gantenbein, M. Thumm, G. Michel","doi":"10.1109/IVELEC.2007.4283208","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283208","url":null,"abstract":"The mechanism of excitation of parasitic LF oscillations inside a coaxial gyrotron has been studied. At present a new coaxial insert with a modified profile on the cathode side of the resonator is under test. A suppression or at least increase of the starting current for the excitation of the LF oscillations is expected. As a first step to increase the Gaussian content of the RF output beam a launcher with only a 3rd order azimuthal perturbation was fabricated. Tests at low power have already been performed and tests with the experimental pre-prototype gyrotron are in progress. The results are presented and discussed.","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":"129116717","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: 21
Broadcasting Satellite System Using Onboard Phased Array Antenna in 21-GHz Band 基于星载相控阵天线的21ghz广播卫星系统
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283290
K. Yamagata, S. Tanaka, K. Shogen
{"title":"Broadcasting Satellite System Using Onboard Phased Array Antenna in 21-GHz Band","authors":"K. Yamagata, S. Tanaka, K. Shogen","doi":"10.1109/IVELEC.2007.4283290","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283290","url":null,"abstract":"Satellite broadcasting in the 21-GHz band is expected to be used for advanced broadcasting services, such as ultrahigh-definition television, which requires extremely high information transmission rates. However, RF signal attenuation due to rainfall is very large in this band. A promising approach to solving this problem is to use an onboard phased array antenna to compensate for the attenuation in rain areas. We have been studying on a miniature traveling wave tube (mini-TWT) for an onboard active phased array antenna. It is necessary that we arrange radiation elements densely so as to achieve high gain of service area, and to suppress sidelobes. We developed a mini-TWT for its amplifier; the length of cross-sectional directions corresponded to the 1.5 wavelengths. This paper describes a concept of the satellite broadcasting in the 21-GHz band and the performance of the mini-TWT in the partial model of a mini-TWT array.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"24 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":"129276736","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
A Gyrotron Backward Wave Oscillator Orperating in the TM11 Mode with Large-Orbit Electron Beam 以大轨道电子束工作于TM11模式的回旋管反向波振荡器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283316
C. Jiao, Ji-run Luo
{"title":"A Gyrotron Backward Wave Oscillator Orperating in the TM11 Mode with Large-Orbit Electron Beam","authors":"C. Jiao, Ji-run Luo","doi":"10.1109/IVELEC.2007.4283316","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283316","url":null,"abstract":"A gyrotron backward wave oscillator (gyro-BWO) operating in the TM11 mode with large-orbit electron beam is proposed. Starting conditions of the operating mode and some possible competing modes are studied by using linear theories. Numerical results show that low velocity ratio is more suitable for the TM11 mode operation and is also helpful for suppressing the competition from the TE modes.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"9 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":"117279978","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
Circuit Design of A High Power, S-Band Eighteen-Beam Klystron 大功率s波段十八束速调管的电路设计
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283374
K. Nguyen, D. Pershing, E. Wright
{"title":"Circuit Design of A High Power, S-Band Eighteen-Beam Klystron","authors":"K. Nguyen, D. Pershing, E. Wright","doi":"10.1109/IVELEC.2007.4283374","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283374","url":null,"abstract":"Circuit design for a high-power fundamental-mode multiple-beam klystron (MBK) is presented. This S-band circuit will be powered with a 42 kV, 41.6A, eighteen-beam electron gun currently under development. The circuit is comprised of six cavities. Three of which have two gaps to achieve desired gain and bandwidth in a reasonably short circuit length. Simulations with MAGIC-3D indicate peak RF power of 740 kW and 3-dB instantaneous bandwidth of> 11% is feasible in a circuit length of approximately 22 cm. Electronic efficiency and gain are 42% and 34-dB, respectively.","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":"115691308","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
TM0m Mode Converters for Relativistic Cherencov Amplifiers and Oscillators 用于相对论Cherencov放大器和振荡器的TM0m模式转换器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283325
A. A. Kurayev, A. K. Sinitsyn, S.I. Yaramionak
{"title":"TM0m Mode Converters for Relativistic Cherencov Amplifiers and Oscillators","authors":"A. A. Kurayev, A. K. Sinitsyn, S.I. Yaramionak","doi":"10.1109/IVELEC.2007.4283325","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283325","url":null,"abstract":"The optimal structures of TM<sub>0m</sub>-TM<sub>0(m</sub> <sub>+</sub> <sub>i)</sub> mode converters on the periodic and arbitrary irregular sections of circular waveguides with the use of block-matrix sweep techniques and minimization Nelder-Mead algorithm are simulated.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"258 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":"114529932","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 Study on Dynamics of Mode Competition in Magnetically Insulated Transmission Line Oscillator (MILO) 磁绝缘传输线振荡器(MILO)模式竞争动力学实验研究
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283340
H. Jung, S. Min, S. Shin, D. Kim, C.H. Kim, D. W. Yim, G. Park
{"title":"Experimental Study on Dynamics of Mode Competition in Magnetically Insulated Transmission Line Oscillator (MILO)","authors":"H. Jung, S. Min, S. Shin, D. Kim, C.H. Kim, D. W. Yim, G. Park","doi":"10.1109/IVELEC.2007.4283340","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283340","url":null,"abstract":"A mode competition phenomenon of gigawatts-nanonoseconds magnetically insulated transmission line oscillator (MILO) is experimentally investigated. A pulsed power system of 500 kV-35 kA and 130 ns pulse length is used for generating the relativistic electron beam. The microwave with peak power of 2.8 GW, pulse duration of 70 ns, and frequency of 1.14 GHz is observed. A spatiotemporal measurement using RF B-dotprobe is in a reasonable agreement with a numerical simulation using a particle-in-cell (PIC) code confirming mode competition between axial modes.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"87 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":"114534851","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 and numerical investigation of auroral cyclotron maser processes 极光回旋脉泽过程的实验与数值研究
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283398
A. Phelps, D. Speirs, S.L. M-Conville, K. Gillespie, K. Ronald, A. Cross, R. Bingham
{"title":"Experimental and numerical investigation of auroral cyclotron maser processes","authors":"A. Phelps, D. Speirs, S.L. M-Conville, K. Gillespie, K. Ronald, A. Cross, R. Bingham","doi":"10.1109/IVELEC.2007.4283398","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283398","url":null,"abstract":"In this paper the results of PiC code simulations and a laboratory experiment to investigate the evolution of an electron beam subject to magnetic compression of up to a factor of 30 is outlined. The experiment consisted of a 75 keV electron beam with significant initial sbeam with significant initial spread in velocity injected into an adjustable convergent magnetic field generated by a solenoid arrangement. The aim was to produce a horseshoe shaped electron velocity distribution and study the subsequent evolution of this distribution within an interaction waveguide at the peak of the axial magnetic field.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"5 10 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":"115233117","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
Estimating Millimeter-Wave-Circuit Insertion Loss from Return-Loss Resonances 从回波损耗共振估计毫米波电路插入损耗
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283370
A. Theiss
{"title":"Estimating Millimeter-Wave-Circuit Insertion Loss from Return-Loss Resonances","authors":"A. Theiss","doi":"10.1109/IVELEC.2007.4283370","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283370","url":null,"abstract":"Measurements of RF loss in millimeter- wave circuits typically are limited to frequencies that are impedance matched to permit transmission through the circuit. An alternate cold-test method can provide estimates of such RF absorption for frequencies that are not matched by measuring return- loss resonances without regard for coupling conditions.","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":"114225058","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
Bent Surface Quasi-Optical Mode Converter with a Special Reflector 具有特殊反射器的曲面准光模式变换器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283323
Niu Xin-jian, Yu Sheng, Li Hong-fu
{"title":"Bent Surface Quasi-Optical Mode Converter with a Special Reflector","authors":"Niu Xin-jian, Yu Sheng, Li Hong-fu","doi":"10.1109/IVELEC.2007.4283323","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283323","url":null,"abstract":"In this paper, the design methodology and numerical result for mode converter that are suitable for high-power microwave application are reported. At present the hotspot of gyrotron study field that the inner quasi-optical mode converter with a special reflector is investigated in this paper. Quasi gauss mode HE11 can be realized with Vlasov launcher and quasi-optical reflector. Phase and direction of the incidence wave is adjusted by each piece of reflector cell.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"190 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":"114851518","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
Adiabatic Magnetron Injection Gun for Low-Voltage Gyrotron 低压回旋管用绝热磁控管注射枪
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283317
B. Yefimov, A. Kuleshov, V. Zhiglo
{"title":"Adiabatic Magnetron Injection Gun for Low-Voltage Gyrotron","authors":"B. Yefimov, A. Kuleshov, V. Zhiglo","doi":"10.1109/IVELEC.2007.4283317","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283317","url":null,"abstract":"Adiabatic magnetron injection gun for low-voltage gyrotron is developed and the test results are presented in this paper. MIG was developed for operation in anode range from 2 to 6 kV and electron current upto 300 mA with pinch parameter varying from 2 to 4. Experiments on optimization of both gun and cavity parameters for a low-voltage gyrotron oscillator are carried out.","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":"126714696","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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