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Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)最新文献

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Design and performance of a Ka-band extended interaction klystron ka波段扩展交互速调管的设计与性能
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999401
Leeming Chen, F. Cheng, J. Wang, C. Yang, K. Chu
{"title":"Design and performance of a Ka-band extended interaction klystron","authors":"Leeming Chen, F. Cheng, J. Wang, C. Yang, K. Chu","doi":"10.1109/IVELEC.2002.999401","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999401","url":null,"abstract":"We have built and tested a prototype extended-interaction klystron (EIK). The EIK is comprised of a single gap input cavity, 4 intermediate buncher cavities with 2 gaps in each and an output cavity with 3 gaps. The extended-interaction cavities, with high R/Q values, are employed for achieving broader bandwidth while maintaining high gain. In addition, all the buncher cavities are made of CuNi alloy to increase the cavity loading for further bandwidth improvement. The catcher cavity is made of oxygen free high conductivity copper (OFHC) for low heat loss. VSWR of the output coupler is designed to be greater than 10 to avoid possible oscillations in the output cavity. A two-stage depressed collector is employed for overall efficiency enhancement.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117269814","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
X-ray tubes with nanostructured carbon cold cathodes 带有纳米结构碳冷阴极的x射线管
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999264
R. Espinosa, M. Munson, S. Snyder
{"title":"X-ray tubes with nanostructured carbon cold cathodes","authors":"R. Espinosa, M. Munson, S. Snyder","doi":"10.1109/IVELEC.2002.999264","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999264","url":null,"abstract":"X-ray tubes that have been designed specifically to incorporate cold cathodes have developed and put in to production. The first cold cathode X-ray tube provides the source for a hand held X-ray fluorescence spectrometer for alloy sorting.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116270435","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
Chaotic oscillations in a delayed feedback traveling wave tube oscillator 延迟反馈行波管振荡器的混沌振荡
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999310
N. Ryskin, A.G. Zaitseva, S.T. Han, J.I. Kim, G. Park
{"title":"Chaotic oscillations in a delayed feedback traveling wave tube oscillator","authors":"N. Ryskin, A.G. Zaitseva, S.T. Han, J.I. Kim, G. Park","doi":"10.1109/IVELEC.2002.999310","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999310","url":null,"abstract":"Many vacuum microwave electron devices, such as backward wave oscillators (BWO), traveling wave tubes (TWT), free-electron lasers (FEL), can demonstrate chaotic oscillation regimes. Generation of chaotic signals is important for a number of applications including modern communicating systems (communication with chaos), microwave plasma heating, particle accelerators. In this report, we present the results of numerical and experimental study of chaotic behavior in a delayed feedback TWT oscillator. Despite the fact that transition to chaos in the TWT was discovered more then 20 years ago, details of the chaotic regimes are still poorly understood.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125766829","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
Initial RF testing of 95 GHz klystrino 95 GHz速调管的初始射频测试
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999402
G. Scheitrum, A. Burke, G. Caryotakis, A. Haase, D. Martin
{"title":"Initial RF testing of 95 GHz klystrino","authors":"G. Scheitrum, A. Burke, G. Caryotakis, A. Haase, D. Martin","doi":"10.1109/IVELEC.2002.999402","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999402","url":null,"abstract":"The 95 GHz klystrino under development at SLAC is designed to operate at 110 kV, 2.4 A and produce 100 kW peak output power and 1 kW average power at 1% duty. The final machining of the LIGA assemblies for the round beam klystrino and initial RF testing are underway The presentation will include the initial RF performance of the klystrino, the thermal modeling of the round and sheet beam designs, as well as beam transport issues and cavity field shaping for W-band sheet beams.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128563294","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
Wideband high efficiency compact TWTs 宽带高效紧凑行波管
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999325
A. Laurent, P. Nugues, T. Beck, D. Henry
{"title":"Wideband high efficiency compact TWTs","authors":"A. Laurent, P. Nugues, T. Beck, D. Henry","doi":"10.1109/IVELEC.2002.999325","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999325","url":null,"abstract":"Over the last 20 years, THALES ELECTRON DEVICES (TED) has developed and produced various broadband TWTs from the low frequencies between 6 and 18 GHz to the high frequencies between 18 and 40 GHz. In the recent years a strong technical and engineering effort has brought up a new product family with broader bandwidth (up to 3 octaves), increased output power: 100W typical, improved efficiency (up to 45%) and smaller size. Simultaneously the technology has been much simplified to drive the manufacturing cost down and is well suited for high volume production. The current applications include ECM systems, Decoys, Data Links and Instrumentation. Other models can be developed from this technology platform as for example a dual band 65 W Ka and 50 W EHF TWT for AEHF equipment.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127294076","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
Development of a tunable, air-cooled, all-gun PM-focused Ku-band klystron 研制一种可调的，风冷的，全炮调焦的ku波段速调管
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999330
T. Habermann, R. Begum, B. Stockwell, L. Zitelli
{"title":"Development of a tunable, air-cooled, all-gun PM-focused Ku-band klystron","authors":"T. Habermann, R. Begum, B. Stockwell, L. Zitelli","doi":"10.1109/IVELEC.2002.999330","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999330","url":null,"abstract":"The growing demands in today's communications market have increased the need for a larger variety and a faster development of competitive products. With the VKU-8893UTA klystron, CPI is expanding its medium-power product line within Ku band. This paper describes the development and the pending production of this klystron.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128985674","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
Design of a Q-band traveling-wave-tube amplifier q波段行波管放大器的设计
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999281
Y. Na, S. Jung, J.J. Choi, R. Kim
{"title":"Design of a Q-band traveling-wave-tube amplifier","authors":"Y. Na, S. Jung, J.J. Choi, R. Kim","doi":"10.1109/IVELEC.2002.999281","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999281","url":null,"abstract":"Summary form only given. Design of a Q-band travelling-wave tube amplifier is presented in this paper. Two types of slow wave circuit with folded-waveguide type and helix type are examined in the traveling-wave-tube amplifier. A 3D particle-in-cell code (MAGIC3D), a 3D electromagnetic code (HFSS) and Pierce theory are used in the amplifier design. A highly reproducible, low cost folded-waveguide traveling-wave-tube amplifier is designed to operate at 40-48 GHz with a peak output radiation power of 200 W. Initial circuit parameters are obtained from the Pierce theory and circuit dispersion relations. A non-linear, large-signal performance of the amplifier is predicted from the 3D particle-in-cell simulation. A simulation model of the two stage serpentine circuit is shown. The non-linear numerical simulations predict an electronic efficiency of 5.6%, corresponding to a saturated radiation power 200 W at 44 GHz where the beam voltage is 21 W and the beam current is 0.17 A. The saturated 3-dB bandwidth is found to be 16% (40.5-47.5 GHz). A design of a Q-band helix traveling-wave-tube amplifier is underway.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126959184","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
TE/sub 21/ second-harmonic gyro-TWT amplifier with an axis-encircling beam TE/sub - 21/二次谐波环轴波束陀螺行波管放大器
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999292
S. Harriet, D. Mcdermott, N. Luhmann
{"title":"TE/sub 21/ second-harmonic gyro-TWT amplifier with an axis-encircling beam","authors":"S. Harriet, D. Mcdermott, N. Luhmann","doi":"10.1109/IVELEC.2002.999292","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999292","url":null,"abstract":"Summary form only given. A second-harmonic TE/sub 21/ gyro-TWT with an axis-encircling electron beam is being constructed at University of California Davis (UCD) that is predicted to double the efficiency of our previous 200 kW, 12% efficient MIG TE/sub 21//sup (2)/ gyro-TWT (Wang et al, Phys. Rev. Lett. vol. 75, p. 4322, 1995), where the superscript refers to the harmonic number. The new device will avoid the loss in efficiency due to off-axis electrons interacting with the resulting linearly polarized node. The amplifier is predicted by our large signal code to produce 50 kW in Ka-band with 20% efficiency, 30 dB saturated gain and 3% bandwidth. The 70 kV, 3.5 A axis encircling beam with v/sub /spl perp///v/sub z/=1.2, /spl Delta/v/sub z//v/sub z/=7%, will be produced by a Cusp electron gun delivered by Northrop Grumman.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132684873","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
Development of 170 GHz and 110 GHz gyrotron for fusion application 用于聚变应用的170 GHz和110 GHz回旋管的研制
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999408
K. Sakamoto, A. Kasugai, Y. Ikeda, K. Hayashi, K. Takahashi, M. Tsuneoka, T. Kariya, Y. Mitsunaka, T. Imai
{"title":"Development of 170 GHz and 110 GHz gyrotron for fusion application","authors":"K. Sakamoto, A. Kasugai, Y. Ikeda, K. Hayashi, K. Takahashi, M. Tsuneoka, T. Kariya, Y. Mitsunaka, T. Imai","doi":"10.1109/IVELEC.2002.999408","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999408","url":null,"abstract":"A high power and long pulse gyrotron development has been carried out in JAERI for fusion application. The frequency is 170 GHz for ITER (International Thermonuclear Experiment Reactor) and 110 GHz for JT-60U tokamak of JAERI. Both gyrotrons have low loss diamond window. The outputs of 0.9 MW/9.2 sec and 0.5 MW/30 sec were demonstrated at 170 GHz with a depressed collector operation. It was proved that a pulse extension is possible without long time conditioning in principle. On 110 GHz gyrotron, 1.2 MW/4s ec and 1 MW/5 sec operation have been accomplished in the heating experiment of JT-60U.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"1157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132048779","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: 21
Effects of modulator misalignment on LINC transmission with traveling wave tube amplifiers 调制器不对中对行波管放大器LINC传输的影响
Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI: 10.1109/IVELEC.2002.999412
A. Choffrut, B. V. Van Veen, J. Booske
{"title":"Effects of modulator misalignment on LINC transmission with traveling wave tube amplifiers","authors":"A. Choffrut, B. V. Van Veen, J. Booske","doi":"10.1109/IVELEC.2002.999412","DOIUrl":"https://doi.org/10.1109/IVELEC.2002.999412","url":null,"abstract":"Limitations on out of band emissions impose a certain degree of linearity on amplifier operation and often forces operation significantly below saturation, the region where the amplifier is most efficient. We present a study of the sensitivity of the LInear amplification with Nonlinear Components (LINC) method using traveling wave tube amplifiers. The LINC approach decomposes the source signal into two constant envelope signals, which are passed through a pair of amplifiers and then recombined to provide an amplified version of the source signal. Since the input to each amplifier has constant envelope, the amplifiers may be operated near saturation in order to obtain high efficiency and yet the overall system remains linear.","PeriodicalId":344852,"journal":{"name":"Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127967419","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
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