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2007 IEEE International Vacuum Electronics Conference最新文献

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Electron-beam-pumped Light Sources Using Field Emitters 使用场发射器的电子束泵浦光源
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283381
T. Sugiyama, K. Shiozawa, S. Shimizu, Y. Neo, M. Okada, T. Ikedo, H. Mimura
{"title":"Electron-beam-pumped Light Sources Using Field Emitters","authors":"T. Sugiyama, K. Shiozawa, S. Shimizu, Y. Neo, M. Okada, T. Ikedo, H. Mimura","doi":"10.1109/IVELEC.2007.4283381","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283381","url":null,"abstract":"We have fabricated novel supper-induced graphite nanoneedle field emitters and Si electron- transparent films for application to electron-beam- pumped light sources. The field emitters exhibited a stable electron emission of 10 muA at an average field of 6V/ mum. The 1.5-mum-thick Si electron-transparent film with an aperture ratio of 75% achieved an electron transmittance of about 60% at an acceleration voltage of 27kV. We have also demonstrated an electron-beam- pumped light source realized by the excitation of Ar gas.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"7 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":"114222607","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 Study of 100GHz Photonic Crystal Reflex Klystron 100GHz光子晶体反射速调管的设计研究
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283269
J. Won, K. Jang, J. So, G. Park, H. Ko
{"title":"Design Study of 100GHz Photonic Crystal Reflex Klystron","authors":"J. Won, K. Jang, J. So, G. Park, H. Ko","doi":"10.1109/IVELEC.2007.4283269","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283269","url":null,"abstract":"High order mode reflex klystron is employed to demonstrate the possibility of realizing the miniaturized high frequency vacuum devices. If we are able to oscillate a cavity's high order mode (ex. TMmn0) using multi-beam, the output power will be increased m times n times and also the cavity size becomes larger at the same frequency, which makes the circuit fabrication easier and provides a higher power capability. A photonic crystal cavity is adopted for high order mode reflex klystron resonator, in which TMmn0 mode can be stably supported and coupled to an external system without distortion of the high order resonance mode. In this case, the high order TMmn0 mode interact dominantly with the multiple electron beams.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"85 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":"115852837","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
Trajectory Modulation Amplifier 轨迹调制放大器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283268
C. Wilsen, M. Kirshner, R. Kowalczyk
{"title":"Trajectory Modulation Amplifier","authors":"C. Wilsen, M. Kirshner, R. Kowalczyk","doi":"10.1109/IVELEC.2007.4283268","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283268","url":null,"abstract":"Microwave vacuum tube amplifiers use either velocity or density modulation to establish an AC current in an electron beam which is subsequently converted to RF energy at the output of the device. VectorTM is a trajectory modulation amplifier.The VectorTM has the potential to revolutionize the RF amplifier market.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"106 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":"124703354","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
Preparation of BN-AIN Composite BN-AIN复合材料的制备
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283277
Juxian Zhang, Jinjun Feng, T. Yan
{"title":"Preparation of BN-AIN Composite","authors":"Juxian Zhang, Jinjun Feng, T. Yan","doi":"10.1109/IVELEC.2007.4283277","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283277","url":null,"abstract":"In this article, the AlN-BN composite powders with the micro structure of micrometer-sized AIN particles coated with BN particles were prepared via a chemical reaction. The AlN-BN composites were fabricated by pressureless sintering composite powders.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"251 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":"123272026","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
The Exact Excitation Equations for the Cavity (Unloaded Cavity) 空腔(空腔)的精确激励方程
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283247
A. A. Kurayev, T. L. Popkova, A. K. Sinitsyn
{"title":"The Exact Excitation Equations for the Cavity (Unloaded Cavity)","authors":"A. A. Kurayev, T. L. Popkova, A. K. Sinitsyn","doi":"10.1109/IVELEC.2007.4283247","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283247","url":null,"abstract":"The exact excitation equations for unloaded cavity resonator with finite conductions of the walls were received by projection method.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"5 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":"123862312","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
An Injection-Locked Ka-Band Oscillator Based on Field-Emission Cathodes 基于场发射阴极的注入锁定ka波段振荡器
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283379
P. Lu, Ming-Chieh Lin
{"title":"An Injection-Locked Ka-Band Oscillator Based on Field-Emission Cathodes","authors":"P. Lu, Ming-Chieh Lin","doi":"10.1109/IVELEC.2007.4283379","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283379","url":null,"abstract":"An injection-locked Ka-band oscillator based on field-emission cathodes is investigated. The phase and frequency controllability has been demonstrated by the finite-difference time-domain particle-in-cell simulations. The results show the consistency with the prediction of Adler's equation.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"80 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":"129330305","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
Three dimensional PIC simulations of a frequency tunable relativistic magnetron 频率可调相对论磁控管的三维PIC模拟
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283333
H. Kim, J. Choi
{"title":"Three dimensional PIC simulations of a frequency tunable relativistic magnetron","authors":"H. Kim, J. Choi","doi":"10.1109/IVELEC.2007.4283333","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283333","url":null,"abstract":"This paper shows that the magnetrons are widely used microwave sources due to advantages of low cost and high efficiency. Two- and three-dimensional simulation studies have been performed on the A6 relativistic magnetron developed at the Massachusetts Institute of Technology (MIT). Experimental and simulation reports of magnetic priming effects for microwave oven magnetron and relativistic magnetrons have been published. It investigated the frequency tunable A6 relativistic magnetron with metal tuner. Inductive tuning is accomplished by inserting conducting rods axially into the resonators in regions where the RF magnetic field is high. In this paper, we discuss the operating characteristics of a frequency tunable relativistic magnetron by the use of a three dimensional PIC code and MAGIC3D.","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":"129599561","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
Fabrication of Diamond-Based 300 and 650 GHz BWOs 300 GHz和650 GHz金刚石基bwo的制备
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283297
J. Dayton, G. Mearini, C. Kory, C. Bower
{"title":"Fabrication of Diamond-Based 300 and 650 GHz BWOs","authors":"J. Dayton, G. Mearini, C. Kory, C. Bower","doi":"10.1109/IVELEC.2007.4283297","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283297","url":null,"abstract":"Prototype 300 and 650 GHz versions of a backward wave oscillator (BWO) based on an intricate diamond structure are being assembled for testing this spring. These sub mm wavelength BWOs will be constructed in a format that combines an electron gun, slow wave circuit, output coupler and transmitting antenna as a monolithic diamond structure. The fabrication process is discussed in this paper.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"18 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":"126910776","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
Improvements to the Rf Characteristics of a Pulsed X-band Magnetron 脉冲x波段磁控管射频特性的改进
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283331
E. Sobieradzki, K. Saleem, M. Brady
{"title":"Improvements to the Rf Characteristics of a Pulsed X-band Magnetron","authors":"E. Sobieradzki, K. Saleem, M. Brady","doi":"10.1109/IVELEC.2007.4283331","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283331","url":null,"abstract":"This paper describes the computer modeling that was used to improve the rf characteristics of an existing pulsed x-band magnetron.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"173 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":"126945162","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
Li-salt functionalised carbon nanotubes as low work function field emitters 锂盐功能化碳纳米管作为低功函数场发射体
2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI: 10.1109/IVELEC.2007.4283283
S. Lyth, R. Hatton, S. Silva
{"title":"Li-salt functionalised carbon nanotubes as low work function field emitters","authors":"S. Lyth, R. Hatton, S. Silva","doi":"10.1109/IVELEC.2007.4283283","DOIUrl":"https://doi.org/10.1109/IVELEC.2007.4283283","url":null,"abstract":"Carbon nanotubes have excellent field emission (FE) properties. The work function (WF) of materials plays a crucial role in their FE properties. From the well known Fowler-Nordheim equation, it is evident that reducing the WF should result in an exponential increase in current density at a given electric field. Therefore, for cold cathode applications it is desirable to minimize the emitter WF without compromising the cathode stability towards oxidation. We have recently shown that the WF of acid-oxidized multiwall carbon nanotubes (o-MWNT) can be reduced by exchanging acidic surface groups with alkali metal cations. In this paper, we report a method for applying o-MWNT onto carbon fibre (CF) fabric from solution and an improvement in the FE properties after converting carboxylic groups to the carboxylate salt of lithium via cation exchange. It is envisaged that this technique could be applied to a wide range of nanotube emitters to reduce the WF and improve the FE properties.","PeriodicalId":254940,"journal":{"name":"2007 IEEE International Vacuum Electronics Conference","volume":"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":"127480649","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
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