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4th IEEE International Conference on Vacuum Electronics, 2003最新文献

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A gridded electron gun for a sheet beam klystron 用于板束速调管的栅格电子枪
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2004-07-01 DOI: 10.1109/IVEC.2003.1286309
M. Read, G. Miram, R. Ives, V. Ivanov, A. Krasnykh
{"title":"A gridded electron gun for a sheet beam klystron","authors":"M. Read, G. Miram, R. Ives, V. Ivanov, A. Krasnykh","doi":"10.1109/IVEC.2003.1286309","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286309","url":null,"abstract":"In this paper we propose a gridded electron gun(dispenser-cathode gun) for sheet beam devices. The current generation of accelerators typically use klystrons with a cylindrical beam generated by a pierce-type electron gun. The gun design were used to determine the starting point for the electrodes to produce the compression. The use of grid was chosen for short pulse formation. The result showed that a very quality beam could be achieved even in the presence of the shadow grid.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122071142","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
Application of the 2D/3D MICHELLE code to electron gun and collector modeling 二维/三维MICHELLE代码在电子枪和集热器建模中的应用
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1285997
J. Petillo, K. Eppley, D. Panagos, E. Nelson, N. Dionne, J. Deford, B. Held, L. Chernyakova, J. Burdette, X. Zhai, M. Cattelino, K. Nguyen, B. Levush
{"title":"Application of the 2D/3D MICHELLE code to electron gun and collector modeling","authors":"J. Petillo, K. Eppley, D. Panagos, E. Nelson, N. Dionne, J. Deford, B. Held, L. Chernyakova, J. Burdette, X. Zhai, M. Cattelino, K. Nguyen, B. Levush","doi":"10.1109/IVEC.2003.1285997","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1285997","url":null,"abstract":"The focus of the development program is to combine modern finite element techniques with improved physics models. The code employs a conformal mesh, including both structured and unstructured mesh architectures for meshing flexibility, along with a new method for accurate, efficient particle tracking. New particle emission models for thermionic beam representation are included that support primary emission, and secondary emission is handled with an advanced model.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115387041","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
Advances in microwave power modules 微波功率模块的进展
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1285989
C. Armstrong
{"title":"Advances in microwave power modules","authors":"C. Armstrong","doi":"10.1109/IVEC.2003.1285989","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1285989","url":null,"abstract":"The microwave power module concept has advanced significantly in the ten years since its initial development going from proof of concept demonstrator to mission critical hardware. The recent progress in the development of compact, low voltage 50-100 W millimeter wave power booster TWTs in Ka and Q-band has firmly extended MPM performance into the millimeter wave frequency band. Modern computational tools, such as the CHRISTINE helix TWT design suite developed at the Naval Research Laboratory, are used to optimize the device electrical parameters to provide state of the art performance in power, efficiency and bandwidth. A high gain, low noise, solid-state amplifier (SSA) provides the drive signal for the MPM vacuum power booster TWT. Typical input drive at the MPM level is between -10 dBm to 0 dBm, although commercial MPMs without a SSA have been developed requiring around 30 dBm input.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123052808","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: 9
Study of field emission arrays for travelling wave tubes 行波管场发射阵列的研究
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286402
Xinghui Li, Fujiang Liao, M. Ding, Guodong Bai, Fuquan Zhang, Jinjun Feng
{"title":"Study of field emission arrays for travelling wave tubes","authors":"Xinghui Li, Fujiang Liao, M. Ding, Guodong Bai, Fuquan Zhang, Jinjun Feng","doi":"10.1109/IVEC.2003.1286402","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286402","url":null,"abstract":"The Spindle type FEAs were fabricated using n-type silicon wafers with different resistivities. The I-V measurements and emission characteristics of FEAs made from high resistivity wafers indicated that the emission performance was greatly improved. The FEAs were coated with a thin layer of nanocrystalline diamond film (NCD) using microwave plasma chemical vapour deposition (MPCVD). Scanning electron microscopy (SEM) observations of FEAs were made before coating NCD and after coating NCD.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123055474","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 CW 500 watt Ka-band coupled-cavity TWT for digital satellite communication 用于数字卫星通信的连续波500瓦ka波段耦合腔行波管
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286028
J. Legarra, M. Cascone, J. Cusick, R. Begum, P. Kolda, D. Andker
{"title":"A CW 500 watt Ka-band coupled-cavity TWT for digital satellite communication","authors":"J. Legarra, M. Cascone, J. Cusick, R. Begum, P. Kolda, D. Andker","doi":"10.1109/IVEC.2003.1286028","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286028","url":null,"abstract":"The paper deals with a CW500 watt Ka-band coupled-cavity TWT for digital satellite communication. The communication and power industries developed a PPM focussed coupled-cavity TWT for conduction cooled amplifier systems. The TWT can be operated at the 500 watt output level or backed off from saturation in the linear mode. The technology advances have been applied to the newly designed CW TWT radar systems.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117120851","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
On a possibility to decrease magnetic intensity in microwave/DC cyclotron wave converter 微波/直流回旋加速器变换器中降低磁场强度的可能性
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286245
V.A. Vanke, H. Matsumoto, N. Shinohara
{"title":"On a possibility to decrease magnetic intensity in microwave/DC cyclotron wave converter","authors":"V.A. Vanke, H. Matsumoto, N. Shinohara","doi":"10.1109/IVEC.2003.1286245","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286245","url":null,"abstract":"This paper discusses CWC which uses two microwave cavities having uniform and quadruple electric fields in the interaction gaps which makes it possible to reduce magnetic intensity in two times. CWC demands magnetic intensity, which corresponds to the cyclotron frequency /spl omega//sub c/ equal to the frequency /spl omega/ of external microwave power source. This requirement (/spl omega//sub c/=/spl omega/) usually creates essential technical problems, especially in the short centimetric and millimetric wavebands.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122503577","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
Development of high power gyrotrons at 110 GHz and 140 GHz 110 GHz和140 GHz高功率回旋管的研制
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286021
T. S. Chu, M. Blank, P. Borchard, P. Cahalan, S. Cauffman, K. Felch, H. Jory
{"title":"Development of high power gyrotrons at 110 GHz and 140 GHz","authors":"T. S. Chu, M. Blank, P. Borchard, P. Cahalan, S. Cauffman, K. Felch, H. Jory","doi":"10.1109/IVEC.2003.1286021","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286021","url":null,"abstract":"High-power, long-pulse or CW millimeter-wave sources are required in electron cyclotron heating or current drive for fusion experiments. Gyrotron oscillators have served as effective sources in this area for many years. To reduce system cost, megawatt gyrotrons are required. At CPI, various programs are underway to deliver long pulse or CW megawatt gyrotrons. In particular, we are building a 110 GHz, 10 sec, 1.5 MW gyrotron. This gyrotron will be completed in early 2004. In addition, we have fabricated and are currently testing a 1 MW CW gyrotron at 140 GHz. Key features of these two gyrotrons include quasi-optical internal converters, diode-type electron guns, CVD (chemical vapor deposition) diamond output windows, and single-stage depressed collectors. In this paper, we will summarize the basic design of the 110 GHz and 140 GHz gyrotrons and report on the experimental results obtained on the megawatt, CW, 140 GHz gyrotron.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121884651","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: 18
New high power CW klystrons at TED 新的高功率连续速调管
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286097
A. Beunas, E. Boghossian, R. Marchesin
{"title":"New high power CW klystrons at TED","authors":"A. Beunas, E. Boghossian, R. Marchesin","doi":"10.1109/IVEC.2003.1286097","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286097","url":null,"abstract":"Thales Electron Devices (TED) has been awarded a contract by CERN to develop and produce 20 units of the klystrons needed to feed the Large Hadrons Collider (LHC). Each of these delivers 300 kW of CW RF power at 400 MHz. Three klystrons have been delivered to CERN up to now.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116852553","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 possible contributions of vacuum electronics to terahertz radiation sources 真空电子学对太赫兹辐射源的可能贡献
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286388
L. Shenggang
{"title":"The possible contributions of vacuum electronics to terahertz radiation sources","authors":"L. Shenggang","doi":"10.1109/IVEC.2003.1286388","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286388","url":null,"abstract":"This paper discusses the possible contributions of vacuum electronics to terahertz sources development. Terahertz generation and amplification based on relativistic electron beams and intense fields. Terahertz radiations are generated by microwave/millimeter wave devices, Cherenkov radiation type devices, electron cyclotron maser, free electron lasers. The scattering of electromagnetic wave from the front of ionization (plasma) or electron beams are discussed and examined.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129007211","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
Measurement of ion-induced secondary electron emission coefficient for MgO thin film with plasma treatment 等离子体处理MgO薄膜离子诱导二次电子发射系数的测量
4th IEEE International Conference on Vacuum Electronics, 2003 Pub Date : 2003-05-28 DOI: 10.1109/IVEC.2003.1286139
H. Jeong, J. Oh, J.Y. Lim, W. B. Park, J.W. Cho, E. H. Choi
{"title":"Measurement of ion-induced secondary electron emission coefficient for MgO thin film with plasma treatment","authors":"H. Jeong, J. Oh, J.Y. Lim, W. B. Park, J.W. Cho, E. H. Choi","doi":"10.1109/IVEC.2003.1286139","DOIUrl":"https://doi.org/10.1109/IVEC.2003.1286139","url":null,"abstract":"The characteristics of MgO protective layers are very important for the development of recent AC-type plasma display panel (AC-PDP). The ion-induced secondary electron emission coefficient /spl gamma/ is one of the characteristics of the MgO protective layer which correlates to the ignition voltage of AC-PDPs. Recently many researchers have been studying to get the highest /spl gamma/. Therefore we selected the method of oxygen (O/sub 2/, Ar, H/sub 2/) plasma treatment for MgO protective layer. In this research, We used two steps of MgO protected layer growing method to get higher quality of it First MgO thin films were prepared by using electron beam evaporation method from sintered materials. And then they were treated by O/sub 2/, Ar and H/sub 2/ plasma by using RF-plasma generation system. And secondary electron emission coefficient obtained for MgO protective layers deposited from sintered material with O/sub 2/ plasma treatment by 5, 10, minutes and without plasma treatment, respectively. The ion-induced secondary electron emission coefficient /spl gamma/ of MgO protective layer was measured by /spl gamma/-FIB (focused ion beam) system throughout this experiment to investigate the influence of these plasma treatments on it. The energy of Ne/sup +/ ions used has been ranged from 100 eV 10 200 eV throughout this experiment.","PeriodicalId":203178,"journal":{"name":"4th IEEE International Conference on Vacuum Electronics, 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129657534","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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