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Linearized approach of crossed-field devices 交叉场器件的线性化方法
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857709
A. Korchakova, O. Nikitenko
{"title":"Linearized approach of crossed-field devices","authors":"A. Korchakova, O. Nikitenko","doi":"10.1109/IVEC.2014.6857709","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857709","url":null,"abstract":"Using of linearized systems describing the crossed-fields devices' operation, taking into account space charge fields, is studied. It allowed simplifying significantly the processes study in crossed-fields devices. It was shown that one of spectrum components coincides with the fundamental mode of magnetron oscillations.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"1 1","pages":"501-502"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82362451","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
Coaxial all cavity extraction in the Recirculating Planar Magnetron 循环平面磁控管同轴全腔提取
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857504
M. Franzi, R. Gilgenbach, B. Hoff, G. Greening, Y. Lau, N. Jordan, D. Simon, D. French, J. Luginsland
{"title":"Coaxial all cavity extraction in the Recirculating Planar Magnetron","authors":"M. Franzi, R. Gilgenbach, B. Hoff, G. Greening, Y. Lau, N. Jordan, D. Simon, D. French, J. Luginsland","doi":"10.1109/IVEC.2014.6857504","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857504","url":null,"abstract":"Recent experiments on the first Recirculating Planar Magnetron (RPM) prototype, the L-band RPM-12a, have demonstrated successful generation of microwave power in the vicinity of pi-mode at 1 GHz using a -300 kV pulsed voltage and 0.2 T axial magnetic field. However, these initial experiments were designed primarily to demonstrate feasibility and validate the RF dispersion relationship. This prototype has not demonstrated the efficient extraction of microwave power into waveguides. A novel approach to power extraction using a coaxial adaptation of the “all cavity extractor” is currently under development at the University of Michigan. The Coaxial All Cavity Extractor (CACE) is a highly compact axial extraction technique that is specifically designed to accommodate the planar slow wave structures of the RPM. Concepts and design of the extractor are presented as well as a new experimental prototype RPM-CACE, a 12-cavity device simulated to yield 450 MW with 60% efficiency at 1.9 GHz.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"14 1","pages":"89-90"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78825458","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
Evaluation of a 4-gap extended interaction output circuit for a 50MW X-band klystron 50MW x波段速调管4间隙扩展相互作用输出电路的评价
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857564
R. Begum, A. Balkcum, T. Hunter, Noel Toralba, J. Legarra
{"title":"Evaluation of a 4-gap extended interaction output circuit for a 50MW X-band klystron","authors":"R. Begum, A. Balkcum, T. Hunter, Noel Toralba, J. Legarra","doi":"10.1109/IVEC.2014.6857564","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857564","url":null,"abstract":"A 50 MW, 12 GHz klystron based on the SLAC XL5 design has been developed and tested to full specifications. The 4-gap extended interaction output circuit is critical for the reduction of the electric field gradients to acceptable levels yielding reliable operation. A systematic cold test method for evaluating the as-built performance of the output circuit against the ideal simulated performance is described. The proposed method can be applied to any extended interaction output circuit with any number of gaps. Additionally, the analysis shows that this type of structure exhibits both standing-wave and traveling-wave characteristics.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"1 1","pages":"209-210"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86501980","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
Progress of an S-band high average power broadband multi-beam klystron s波段高平均功率宽带多波束速调管的研究进展
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857517
Dongping Gao, Yao-gen Ding, Zhaochuan Zhang, Bin Shen, Zhi-qiang Zhang, Jing Cao, Hong-hong Gu, Caiying Wang, Feng Wang
{"title":"Progress of an S-band high average power broadband multi-beam klystron","authors":"Dongping Gao, Yao-gen Ding, Zhaochuan Zhang, Bin Shen, Zhi-qiang Zhang, Jing Cao, Hong-hong Gu, Caiying Wang, Feng Wang","doi":"10.1109/IVEC.2014.6857517","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857517","url":null,"abstract":"An S-band high average power MBK producing peak power of 500kW and average power of 30 kW over 10% of relative bandwidth has been designed in Institute of Electronics, Chinese Academy of Sciences (IECAS). Two klystrons are manufactured and have been well tested. Fundamental mode was chosen for RF interaction system, and both calculation and experimental results will also be addressed in this paper.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"454 1","pages":"117-118"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82939244","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
Electron bunching in stepped electric-field profiles 阶梯式电场剖面中的电子聚束
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857644
J. Barroso
{"title":"Electron bunching in stepped electric-field profiles","authors":"J. Barroso","doi":"10.1109/IVEC.2014.6857644","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857644","url":null,"abstract":"On the basis of analytical considerations and numerical simulation, this work demonstrates that transit-time tubes with stepped RF electric-field profiles can provide electron conversion efficiency in excess of 40 percent. This represents a two-fold enhancement in the conversion efficiency in comparison with that obtained with a longitudinally uniform electric-field distribution. Such an improvement arises from a phase synchronization process due to the action of RF electric fields of reversed signs along the interaction space.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"11 1","pages":"371-372"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89014900","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 one-dimensional large signal simulation of folded waveguide TWTs 折叠波导行波管的一维大信号模拟
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857699
Weizhong Yan, Yu-Lu Hu, C. Bai, Zhonghai Yang, Jianqing Li, Xiaofang Zhu, Bin Li
{"title":"A one-dimensional large signal simulation of folded waveguide TWTs","authors":"Weizhong Yan, Yu-Lu Hu, C. Bai, Zhonghai Yang, Jianqing Li, Xiaofang Zhu, Bin Li","doi":"10.1109/IVEC.2014.6857699","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857699","url":null,"abstract":"A steady-state large signal model of the beam-wave interaction in a folded or serpentine waveguide traveling-wave tube is described. The model used a three-port network representation of the circuit and a 1-D disk model of the beam. Values of the admittance elements that characterize the model are identified with a 3-D finite element code, HFSS. This model can be used to simulate the beam-wave interaction in other types of slow-wave structures.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"193 1","pages":"481-482"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83089107","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
Fabrication of relatively thin diamond films for short mm wave and THz TWT windows 用于短毫米波和太赫兹行波管窗口的相对较薄的金刚石薄膜的制备
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857689
M. Ding, Lili Li, Jinjun Feng
{"title":"Fabrication of relatively thin diamond films for short mm wave and THz TWT windows","authors":"M. Ding, Lili Li, Jinjun Feng","doi":"10.1109/IVEC.2014.6857689","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857689","url":null,"abstract":"To improve mechanical properties of relatively thin diamond films used in short mm wave and THz TWT windows, we propose a novel fabrication process, in which an ultra-nanocrystalline diamond (UNCD) process is incorporated into the conventional polycrystalline diamond (PCD) deposition. This paper describes the fabrication method, growing process of UNCD on PCD and improvement in fracture strength of the composite diamond films.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"10 1","pages":"461-462"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88700621","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
Demonstration of a wideband 10-kW Ka-band sheet beam TWT amplifier 宽带10kw ka波段片波束行波管放大器的演示
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857519
D. Pershing, K. Nguyen, D. Abe, E. Wright, P. Larsen, J. Pasour, S. Cooke, A. Balkcum, F. Wood, R. Myers, B. Levush
{"title":"Demonstration of a wideband 10-kW Ka-band sheet beam TWT amplifier","authors":"D. Pershing, K. Nguyen, D. Abe, E. Wright, P. Larsen, J. Pasour, S. Cooke, A. Balkcum, F. Wood, R. Myers, B. Levush","doi":"10.1109/IVEC.2014.6857519","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857519","url":null,"abstract":"A sheet-beam coupled-cavity traveling wave tube has produced over 10 kW of peak power at a center frequency of 34 GHz, with a 3-dB bandwidth of almost 5 GHz. The power of this amplifier is an order of magnitude higher than state-of-the-art conventional amplifiers of comparable frequency, bandwidth, and operating voltage (<;20 kV). This unprecedented performance is made possible by a unique, NRL-developed sheet electron beam along with a novel slow-wave interaction structure. High-current, low-voltage operation provides high gain per unit length and allows an interaction structure <; 5-cm long to be used to achieve the desired gain of 15 dB at saturation. Measured performance agrees well with 3-D particle-in-cell simulations.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"11 1","pages":"121-122"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88741471","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
Microfabricated 94 GHz TWT 微型制造94 GHz行波管
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857547
C. Kory, J. Dayton, G. Mearini, M. Lueck
{"title":"Microfabricated 94 GHz TWT","authors":"C. Kory, J. Dayton, G. Mearini, M. Lueck","doi":"10.1109/IVEC.2014.6857547","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857547","url":null,"abstract":"Teraphysics Corporation is developing a 94 GHz, 25 W helical traveling wave tube (TWT) with 60% overall efficiency. The TWT includes several innovations including a reinvented helix geometry and fabrication that is compatible with lithographic, microfabrication techniques; a novel mechanical design where the electron gun, circuit and collector are fabricated simultaneously for alignment within two microns; and a novel, compact, periodic permanent magnet focusing configuration. The result is a compact device approximately 2.6” long, 1.9” in diameter, with weight of 1 lb, which will serve as Teraphysics' platform for future mm-wave and THz devices.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"16 1","pages":"175-176"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86668637","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
Sub-THz CW clinotron oscillators with increased output power 输出功率增加的亚太赫兹连续波微波振荡器
IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference Pub Date : 2014-04-22 DOI: 10.1109/IVEC.2014.6857496
A. Kuleshov, S. Ponomarenko, S. Kishko, V. Zavertanniy, E. Khutoryan, B. Yefimov
{"title":"Sub-THz CW clinotron oscillators with increased output power","authors":"A. Kuleshov, S. Ponomarenko, S. Kishko, V. Zavertanniy, E. Khutoryan, B. Yefimov","doi":"10.1109/IVEC.2014.6857496","DOIUrl":"https://doi.org/10.1109/IVEC.2014.6857496","url":null,"abstract":"The parameters of sub-THz CW clinotrons developed in IRE NAS of Ukraine are presented. The output power increase is achieved using optimized magnetic focusing system. Multiple-stage grating is proposed as a part of clinotron electromagnetic structure to provide the feedback by hybrid surface-volume modes that results in ohmic losses decrease in THz range. Comparison of simulation and experimental results of the interaction of the intense ribbon electron beam with hybrid surface-volume modes of sub-THz clinotron oscillator have been resented and discussed.","PeriodicalId":88890,"journal":{"name":"IEEE International Vacuum Electronics Conference. International Vacuum Electronics Conference","volume":"1 1","pages":"73-74"},"PeriodicalIF":0.0,"publicationDate":"2014-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89612573","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
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