In this work we investigated the correlation between the emission properties of Scandia doped dispenser cathodes and their surface features. A proposal for explanation of the observed phenomena has been suggested.
本文研究了掺杂钪阴极的发射特性与其表面特征之间的关系。有人提出了一种解释所观察到的现象的建议。
{"title":"Correlation of emission behavior and surface feature of Scandia doped dispenser cathodes","authors":"Jinshu Wang, Yanchun Wang, Yiman Wang, Lili Li, W. Liu, Xizhu Zhang","doi":"10.1109/IVELEC.2008.4556419","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556419","url":null,"abstract":"In this work we investigated the correlation between the emission properties of Scandia doped dispenser cathodes and their surface features. A proposal for explanation of the observed phenomena has been suggested.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"107 1-2 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":"116639821","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556503
P. Mardahl
There has been much research interest in improving magnetron performance by employing various priming techniques, such as shaped cathodes and nonuniform magnetic fields. These priming techniques have been successfully applied to reduce magnetron noise and also improve mode-locking and efficiency (Neculaes et al., 2005), (P. Fleming et al., 2007).
{"title":"Energy losses in simulated relativistic Michigan A6 magnetron with shaped cathode","authors":"P. Mardahl","doi":"10.1109/IVELEC.2008.4556503","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556503","url":null,"abstract":"There has been much research interest in improving magnetron performance by employing various priming techniques, such as shaped cathodes and nonuniform magnetic fields. These priming techniques have been successfully applied to reduce magnetron noise and also improve mode-locking and efficiency (Neculaes et al., 2005), (P. Fleming et al., 2007).","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"44 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":"116898058","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556416
K. Lukin, E. Khutoryan, A. Tsvyk
Preliminary results of theoretical investigations of multi-frequency regimes in diffraction radiation oscillator are presented. Self-synchronization of two OR modes has been revealed in case of rigid self-excitation regime.
给出了衍射辐射振荡器多频区理论研究的初步结果。在刚性自激状态下，揭示了两种OR模式的自同步。
{"title":"Mode self-synchronization in diffraction radiation oscillator","authors":"K. Lukin, E. Khutoryan, A. Tsvyk","doi":"10.1109/IVELEC.2008.4556416","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556416","url":null,"abstract":"Preliminary results of theoretical investigations of multi-frequency regimes in diffraction radiation oscillator are presented. Self-synchronization of two OR modes has been revealed in case of rigid self-excitation regime.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"175 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":"125806621","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556322
S. Sengele, Hongrui Jiang, J. Booske, D. W. van der Weide, C. Kory, L. Ives
The development of a selective metallization process capable of metallizing only the top of a microfabricated, raised meander line ridge is described. This fabrication process has unique potential in the development of millimetre-wave and terahertz regime slow wave structures for travelling wave tubes. The fabrication process will be described and the latest images and measured data will be presented.
{"title":"A selectively metallized, microfabricated W-band meander line TWT circuit","authors":"S. Sengele, Hongrui Jiang, J. Booske, D. W. van der Weide, C. Kory, L. Ives","doi":"10.1109/IVELEC.2008.4556322","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556322","url":null,"abstract":"The development of a selective metallization process capable of metallizing only the top of a microfabricated, raised meander line ridge is described. This fabrication process has unique potential in the development of millimetre-wave and terahertz regime slow wave structures for travelling wave tubes. The fabrication process will be described and the latest images and measured data will be presented.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"14 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":"116055140","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556499
K. Ilyenko, V. Goryashko
We study the magnetoresonant amplification regime, formulate a criterion of chaotic dynamics and find the maximal gain under the undulator synchronism for a weakly-relativistic hybrid planar ubitron/ free-electron maser.
{"title":"Dynamical chaos and magnetoresonant gain in hybrid planar ubitron","authors":"K. Ilyenko, V. Goryashko","doi":"10.1109/IVELEC.2008.4556499","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556499","url":null,"abstract":"We study the magnetoresonant amplification regime, formulate a criterion of chaotic dynamics and find the maximal gain under the undulator synchronism for a weakly-relativistic hybrid planar ubitron/ free-electron maser.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"30 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":"122919678","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556480
A. K. Agrawal, S. Raina, R. Kumar, S. Kamath, L. Kumar
An approach to modeling a resonant meanderline attenuator of helical slow-wave structure for a travelingwave tube is presented that uses eigen-mode solver in HFSS. The dispersion, interaction impedance and attenuation characteristics of the structure in the presence of the resonant attenuator were predicted using the model and were validated against experimental results, published elsewhere.
{"title":"Simulation of resonant meander-line loaded helical slow-wave structure for a TWT","authors":"A. K. Agrawal, S. Raina, R. Kumar, S. Kamath, L. Kumar","doi":"10.1109/IVELEC.2008.4556480","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556480","url":null,"abstract":"An approach to modeling a resonant meanderline attenuator of helical slow-wave structure for a travelingwave tube is presented that uses eigen-mode solver in HFSS. The dispersion, interaction impedance and attenuation characteristics of the structure in the presence of the resonant attenuator were predicted using the model and were validated against experimental results, published elsewhere.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"65 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":"129723686","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556334
D. A. Force, R. Simons, T. T. Peterson, A. Rodriguez-Arroyo, J. Visalsawat, P. Spitsen, W. Menninger, N. Robbins, D. R. Dibb, P. C. Todd
This paper presents the K-band traveling wave tube amplifier (TWTA) developed for the lunar reconnaissance orbiter and discusses the new capabilities it provides.
介绍了为月球侦察轨道器研制的k波段行波管放大器(TWTA)，并对其提供的新性能进行了讨论。
{"title":"K-band TWTA for the NASA lunar reconnaissance orbiter","authors":"D. A. Force, R. Simons, T. T. Peterson, A. Rodriguez-Arroyo, J. Visalsawat, P. Spitsen, W. Menninger, N. Robbins, D. R. Dibb, P. C. Todd","doi":"10.1109/IVELEC.2008.4556334","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556334","url":null,"abstract":"This paper presents the K-band traveling wave tube amplifier (TWTA) developed for the lunar reconnaissance orbiter and discusses the new capabilities it provides.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"37 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":"124702615","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556383
Yao-gen Ding, Bin Shen, Jing Cao, Yongqing Zhang, C. Ruan, Hong-hong Gu, Ding Zhang, Caiying Wang, Ming Cao
Three types of X-band Multi-Beam Klystrons (MBKs) are currently developing at the Institute of Electronics, Chinese Academy of Sciences (IECAS). These MBKs operate on the frequency range from 8-10GHz, and have peak power of 50-100 kW, average power of 2.5-5 kW. The main design specifications of these MBKs are listed.
{"title":"Research progress on X-Band Multi-Beam Klystron","authors":"Yao-gen Ding, Bin Shen, Jing Cao, Yongqing Zhang, C. Ruan, Hong-hong Gu, Ding Zhang, Caiying Wang, Ming Cao","doi":"10.1109/IVELEC.2008.4556383","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556383","url":null,"abstract":"Three types of X-band Multi-Beam Klystrons (MBKs) are currently developing at the Institute of Electronics, Chinese Academy of Sciences (IECAS). These MBKs operate on the frequency range from 8-10GHz, and have peak power of 50-100 kW, average power of 2.5-5 kW. The main design specifications of these MBKs are listed.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"21 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":"129795413","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556485
A. Bera, U. Singh, R. R. Rao, A. Sinha
A triode type magnetron injection gun (MIG) shown in Fig. 1 for a 200 kW, 42 GHz gyrotron has been designed. Operating voltage of modulating anode is 29 KV and accelerating voltage is 65 KV. Operation mode of this gyrotron is TE03 and it would be used in a TOKAMAK system for plasma heating. This MIG is designed by using commercially available code EGUN and three in house developed software code MIGSYN, GINTMESH and MIGANS respectively.
{"title":"Design of MIG for 42GHz, 200kW Gyrotron","authors":"A. Bera, U. Singh, R. R. Rao, A. Sinha","doi":"10.1109/IVELEC.2008.4556485","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556485","url":null,"abstract":"A triode type magnetron injection gun (MIG) shown in Fig. 1 for a 200 kW, 42 GHz gyrotron has been designed. Operating voltage of modulating anode is 29 KV and accelerating voltage is 65 KV. Operation mode of this gyrotron is TE03 and it would be used in a TOKAMAK system for plasma heating. This MIG is designed by using commercially available code EGUN and three in house developed software code MIGSYN, GINTMESH and MIGANS respectively.","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":"129170940","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}
Pub Date : 2008-04-22DOI: 10.1109/IVELEC.2008.4556557
M. Cascone
Vacuum electronics play a large and expanding role in communication and broadcasting networks. It is well known that TWTs are commonly used in satellite downlink transmitters because of their high efficiency and low weight. But vacuum electronics are also essential to many forms of earth-based communications. Uplink satellite stations use TWTs, EIKs, CCTWTs and Klystrons to provide communications links that are cost-efficient and reliable. Terrestrial repeaters using Klystrons and TWTs provide digital radio signals where satellite cannot reach. Inductive output tubes (IOTs) (Klystrodes) power UHF television broadcasts with HDTV content. Troposcatter systems use Klystrons and TWTs to provide point-point high data rate links for transportable applications.
{"title":"Vacuum electronics for communications and broadcasting","authors":"M. Cascone","doi":"10.1109/IVELEC.2008.4556557","DOIUrl":"https://doi.org/10.1109/IVELEC.2008.4556557","url":null,"abstract":"Vacuum electronics play a large and expanding role in communication and broadcasting networks. It is well known that TWTs are commonly used in satellite downlink transmitters because of their high efficiency and low weight. But vacuum electronics are also essential to many forms of earth-based communications. Uplink satellite stations use TWTs, EIKs, CCTWTs and Klystrons to provide communications links that are cost-efficient and reliable. Terrestrial repeaters using Klystrons and TWTs provide digital radio signals where satellite cannot reach. Inductive output tubes (IOTs) (Klystrodes) power UHF television broadcasts with HDTV content. Troposcatter systems use Klystrons and TWTs to provide point-point high data rate links for transportable applications.","PeriodicalId":113971,"journal":{"name":"2008 IEEE International Vacuum Electronics Conference","volume":"20 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":"123926966","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}
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