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2008 IEEE International Vacuum Electronics Conference最新文献

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Experimental demonstration of MBK2, an eight-beam, five-cavity multiple-beam klystron 八束五腔多束速调管MBK2的实验演示
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556384
D. Abe, J. Qiu, B. Levush, D. Pershing, E. Wright, K. Nguyen, F. Wood, R. Myers, E. Eisen, I. Chernyavskiy, A. Vlasov
{"title":"Experimental demonstration of MBK2, an eight-beam, five-cavity multiple-beam klystron","authors":"D. Abe, J. Qiu, B. Levush, D. Pershing, E. Wright, K. Nguyen, F. Wood, R. Myers, E. Eisen, I. Chernyavskiy, A. Vlasov","doi":"10.1109/IVELEC.2008.4556384","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556384","url":null,"abstract":"We describe the results of recent experiments with an eight-beam, five-cavity multiple-beam klystron (MBK).","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121116027","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
Measured performance of magnetron injection guns for gyrotrons 陀螺用磁控管注射枪的性能测量
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556549
R. Ives, D. Marsden, G. Collins, G. Miram, K. Gunther, M. Curtis, P. Borchard
{"title":"Measured performance of magnetron injection guns for gyrotrons","authors":"R. Ives, D. Marsden, G. Collins, G. Miram, K. Gunther, M. Curtis, P. Borchard","doi":"10.1109/IVELEC.2008.4556549","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556549","url":null,"abstract":"Magnetron injection guns (MIGs) are a principle component in gyrotrons and gyroklystrons. The performance of the RF device critically depends on the performance of the MIG that provides the electron beam. Unfortunately, recent measurements indicate that MIGS often generate asymmetrical electron beams that can adversely impact the operation of the RF source. This presentation will describe the measurement facility and provide results from recent tests.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123331984","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 a high power W-band aser based on a two dimensional periodic structure 基于二维周期结构的高功率w波段激光器设计
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556496
L. Fisher, I. Konoplev, A. Cross, A. Phelps
{"title":"Design of a high power W-band aser based on a two dimensional periodic structure","authors":"L. Fisher, I. Konoplev, A. Cross, A. Phelps","doi":"10.1109/IVELEC.2008.4556496","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556496","url":null,"abstract":"High power millimetre-wave sources operating in the W-band (75 GHz-110 GHz) frequency range are important for a number of applications. This work will focus on the design and construction of a high power maser operating in the W-band frequency range, which can be capable of generating spatially and temporally coherent radiation at a power of at least 10 MW.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582040","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
Particle-in-cell simulations on a Ka-band, double-slot staggered coupled-cavity traveling-wave tube ka波段双槽交错耦合腔行波管的细胞内粒子模拟
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556354
H. Kim, Hyoung-Jong Kim, J. Choi, S. Ha
{"title":"Particle-in-cell simulations on a Ka-band, double-slot staggered coupled-cavity traveling-wave tube","authors":"H. Kim, Hyoung-Jong Kim, J. Choi, S. Ha","doi":"10.1109/IVELEC.2008.4556354","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556354","url":null,"abstract":"This paper focuses on PIC simulations of Ka-band, double-slot staggered coupled-cavity TWT. The coordinate system used in the simulation is a rectangular coordinate system (x, y, z). The paper shows a MAGIC3D model of a double-slot staggered CCTWT circuit. Coupling slots are cut into the wall to separating the cavities. There are two slots rotated 180 degrees about the beam axis in the same wall. The slot location is staggered by 90 degrees for successive walls. The CCTWT employed a reentrant double-slot staggered RF cavity structure. The choice of double staggered slots was made because of the wide frequency bandwidth and the moderate interaction impedance.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114187396","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
Using COMSOL Multiphysics software to model anisotropic dielectric and metamaterial effects in folded-waveguide traveling-wave tube slow-wave circuits 利用COMSOL Multiphysics软件模拟折叠波导行波管慢波电路中的各向异性介电和超材料效应
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556469
David P. Starinshak, Nathan D. Smith, Jeffrey D. Wilson
{"title":"Using COMSOL Multiphysics software to model anisotropic dielectric and metamaterial effects in folded-waveguide traveling-wave tube slow-wave circuits","authors":"David P. Starinshak, Nathan D. Smith, Jeffrey D. Wilson","doi":"10.1109/IVELEC.2008.4556469","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556469","url":null,"abstract":"The electromagnetic effects of conventional dielectrics, anisotropic dielectrics, and metamaterials were modelled in a terahertz-frequency folded-waveguide slow-wave circuit. Results of attempts to utilize these materials to increase efficiency are presented.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115828532","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
Characterization of osmium-ruthenium coatings for porous tungsten dispenser cathodes 多孔钨分配器阴极用锇钌涂层的表征
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556406
T. Balk, Wen-Chung Li, S. Roberts
{"title":"Characterization of osmium-ruthenium coatings for porous tungsten dispenser cathodes","authors":"T. Balk, Wen-Chung Li, S. Roberts","doi":"10.1109/IVELEC.2008.4556406","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556406","url":null,"abstract":"Dispenser cathodes serve as electron sources in numerous vacuum devices, including traveling wave tubes and cathode ray tubes. These devices find use in commercial, military and space applications, requiring a long and reliable operating lifetime, especially for space-based operation. Semicon Associates, in Lexington, KY, leads this market, producing over 20,000 dispenser cathodes annually. The cathodes comprise several materials, including platinum group metal coatings that add significant production cost. It is not yet understood how the microstructure of these precious metal films affects cathode performance. Fundamental understanding of microstructure-property relationships in the coating could improve device performance and allow more economical use of the precious metals.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115459213","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: 7
A 650 GHz helical BWO 650 GHz螺旋BWO
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556366
J. Dayton, C. Kory, G. Mearini, D. Malta, M. Lueck, C. Bower
{"title":"A 650 GHz helical BWO","authors":"J. Dayton, C. Kory, G. Mearini, D. Malta, M. Lueck, C. Bower","doi":"10.1109/IVELEC.2008.4556366","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556366","url":null,"abstract":"The operational frequency of helical vacuum electron devices has always been limited by the ability of conventional technology to fabricate very small helices, and by the difficulty of passing a meaningful current through the center of such a small structure. Microfabrication technology now offers the possibility of creating helices smaller in outside diameter than a human hair. These helices are not fabricated by wrapping wire or tape around a mandrel, they are grown. We will use such small helices to create a new class of vacuum electron devices that will operate by passing an electron beam around the outside of the helix, rather than through the center. This technology not only offers the opportunity to make meaningful incursions into a previously unused portion of the electromagnetic spectrum, it offers the possibility to do so inexpensively and in large quantities. This paper will discuss the design rationale and fabrication plan to be employed for the first device of this new class, a 650 GHz helical backward wave oscillator (BWO). A companion paper will describe the computational simulation of the 650 GHz BWO.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132571591","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: 7
Effect of electron energy distribution function on the global model for high power microwave breakdown at high pressures 电子能量分布函数对高压高功率微波击穿全局模型的影响
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1063/1.2942382
S. Nam, J. Verboncoeur
{"title":"Effect of electron energy distribution function on the global model for high power microwave breakdown at high pressures","authors":"S. Nam, J. Verboncoeur","doi":"10.1063/1.2942382","DOIUrl":"https://doi.org/10.1063/1.2942382","url":null,"abstract":"Most volume-averaged global models assume a Maxwellian distribution for the electron energy distribution function (EEDF) in plasma discharges. The electrons, however, are not in the equilibrium in most discharges unless the electron-electron collision is dominant. The assumption of a Maxwellian EEDF can result in inaccurate reaction rate coefficients for the plasma discharge and lead to the wrong breakdown behavior prediction. Since the collisional plasma properties strongly depend on those coefficients, they are important to predict the plasma breakdown properly. This work will demonstrate the effect of the EEDF on the global model and propose a method to find an approximation of the EEDF that can improve the fidelity of the global model for prediction of high power microwave (HPM) breakdown in the high pressure regime.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131379862","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: 49
Investigation of secondary electron emission suppression for TWT multistage depressed collectors 行波管多级抑制集热器抑制二次电子发射的研究
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556372
M. Ding, Mingguang Huang, Jinjun Feng, Guodong Bai, T. Yan
{"title":"Investigation of secondary electron emission suppression for TWT multistage depressed collectors","authors":"M. Ding, Mingguang Huang, Jinjun Feng, Guodong Bai, T. Yan","doi":"10.1109/IVELEC.2008.4556372","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556372","url":null,"abstract":"We have built an ion treatment system for TWT multistage depressed collectors (MDCs), and investigated the process for secondary electron emission (SEE) suppression. It is found that SEE ratio for oxygen-free high-conductive copper (OFHC) plates is closely related to deposition rate of Mo and surface texture. With the optimized process, SEE ratio has been reduced to a half of the untreated (OFHC).","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127359203","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
High-perveance W-band sheet-beam electron gun design 高性能w波段板束电子枪设计
2008 IEEE International Vacuum Electronics Conference Pub Date : 2008-04-22 DOI: 10.1109/IVELEC.2008.4556326
K. Nguyen, J. Pasour, E. Wright, J. Petillo, B. Levush
{"title":"High-perveance W-band sheet-beam electron gun design","authors":"K. Nguyen, J. Pasour, E. Wright, J. Petillo, B. Levush","doi":"10.1109/IVELEC.2008.4556326","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556326","url":null,"abstract":"A design methodology for sheet-beam formation and solenoidal magnetic field transport is described, and a point design for a W-band amplifier gun and beam transport is presented. The gun topology flexibly permits adjustment of beam width to accommodate various interaction circuits while maintaining beam height. This topology has been employed in the design of a 19.5 kV, 3.6 A (1.32 mu-perv.) gun with beam final cross-section of approximately 4.2 mm x; 0.32 mm, using the 3-D gun code MICHELLE in conjunction with the magnet code MAXWELL-3D. Beam thermal effects due to cathode temperature are also included in the simulation.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115926570","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: 16
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