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2016 IEEE International Vacuum Electronics Conference (IVEC)最新文献

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Impregnated cathode processing for microwave tubes 微波管浸渍阴极工艺
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561926
C. Motta
{"title":"Impregnated cathode processing for microwave tubes","authors":"C. Motta","doi":"10.1109/IVEC.2016.7561926","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561926","url":null,"abstract":"In this paper an impregnated cathode processing method for microwave tubes application is described. The methodology consists of three steps. In the first step is described is barium calcium aluminate preparation, the cathode tungsten porous manufacturing and the cathode impregnation. In the second step the cathode test vehicle is described and the final step, the cathode characterization is presented.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134157450","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
Fabrication technology for multi megawatt peak RF absorption layer 多兆瓦峰值射频吸收层制备技术
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561913
A. Krasnykh
{"title":"Fabrication technology for multi megawatt peak RF absorption layer","authors":"A. Krasnykh","doi":"10.1109/IVEC.2016.7561913","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561913","url":null,"abstract":"An RF absorber capable of stable absorption of multi MW peak and several kW average powers is needed for traveling wave mode high gradient accelerating structures. At the end of structure an RF load is used to absorb residual RF power left in the system. Typically, a liquid media (for example, pure water) is used as an effective power absorber of this residual power. However most large scale accelerators require a metal interface to separate the high RF vacuum envelope and any liquids used to carry away heat from RF absorption. This requirement comes from a desire to minimize the possibility of contaminating the vacuum envelope. The metal/liquid interface is a weak component for a high peak power mode operation. Our presentation we will address is the development of a multi MW RF absorber that is compatible with ultra-high vacuum operation while reliably and stably absorbing MW level peak power. Load prototypes developed at SLAC using this technology have proven capable of absorbing >30 MW peak, >4 kW average, and 120 Hz RF pulse with an attenuation rate 5.5 dB per meter for S-Band case.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128954648","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
Ku band, 100 kW traveling wave tube based on large quasi-optical spatial power combining array 基于大型准光学空间功率组合阵列的Ku波段100kw行波管
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561818
R. Hwu, J. Ren, D. Kress, Sam V. Judd, Jordan M. Krebs, L. Sadwick, A. Burke, J. Petillo
{"title":"Ku band, 100 kW traveling wave tube based on large quasi-optical spatial power combining array","authors":"R. Hwu, J. Ren, D. Kress, Sam V. Judd, Jordan M. Krebs, L. Sadwick, A. Burke, J. Petillo","doi":"10.1109/IVEC.2016.7561818","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561818","url":null,"abstract":"We report here further development of the novel quasi-optical spatial power combining array for high power millimeter wave (MMW) traveling wave tubes (TWTs) by demonstrating a Ku-band high power TWT which covers 12-15 GHz and with 100 kilowatt (kW) output power. Specifically, a Ku-band high power TWT which consists of a quasi-optical spatial power combining array of fifteen beam-wave interaction circuit slow wave structures and, as a result, beam width/height aspect ratio of close to 85 was developed to achieve a combined output power of over 100 kW at Ku-band. The 15 individual beam-wave interaction structures in the quasi-optical spatial power combining array are arranged into a linear array. Instead of a single cathode, fifteen cathodes, each with its own focus electrode or, in other words, a total of 15 focus electrodes are also used to create a required large sheet of beam for the large quasi-optical spatial power combining array of 15 channels of individual beam-wave interaction structure. Although a single stage collector was initially designed, however, a multi-stage depressed collector will also be designed and implemented to improve the efficiency of this K-band high power TWT. The overall size of the Ku-band high power TWT is relatively small since the same vacuum envelope and electron beam focus optics are shared among the five beam-wave interaction structures. Design and fabrication of this Ku-band high power TWT will be presented to demonstrate the large quasi optical spatial power combining array for very high power MMW TWTs and with reasonable broad bandwidth.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133266302","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
Thermal analysis of a output window for 108GHz folded waveguide traveling-wave tube 108GHz折叠波导行波管输出窗口的热分析
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561971
Ke Li, Wenxin Liu, Yong Wang, M. Cao
{"title":"Thermal analysis of a output window for 108GHz folded waveguide traveling-wave tube","authors":"Ke Li, Wenxin Liu, Yong Wang, M. Cao","doi":"10.1109/IVEC.2016.7561971","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561971","url":null,"abstract":"A sapphire output window is designed for 108GHz folded waveguide traveling-wave tube (FW-TWT). The voltage standing wave ratio (VSWR) is calculated using CST Microwave Studio (MWS). The transmission modes in the window are analyzed. Thermal analysis of the output window using ANSYS package is presented. With different power losses in the window, temperature, total deformation and equivalent stress had been simulated considering different transmission modes in the window. The results show that all aspects of the designed output window can meet the requirement of thermodynamics.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128473556","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 and analysis of Ka-band MIMO integrated TWTs ka波段MIMO集成行波管的设计与分析
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561876
Qiang Zhang, Y. Hu, Yanjun Cui, Bo Chen, Jinjun Feng
{"title":"Design and analysis of Ka-band MIMO integrated TWTs","authors":"Qiang Zhang, Y. Hu, Yanjun Cui, Bo Chen, Jinjun Feng","doi":"10.1109/IVEC.2016.7561876","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561876","url":null,"abstract":"A four channels Ka-band multi-in-multi-out (MIMO) integrated TWT was designed based on previous three channels Ku-band integrated TWT. This device integrates four helices in one periodical permanent magnet (PPM) system. Over 50W output power could be achieved for each channel with overall efficiency higher than 40%.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127095069","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
Manufacturing and tests of the European 1 MW, 170 GHz CW gyrotron prototype for ITER 欧洲1兆瓦、170千兆赫连续波回旋加速器原型机的制造和测试
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561795
Y. Rozier, F. Albajar, S. Alberti, K. Avramidis, T. Bonicelli, F. Cismondi, P. Frigot, G. Gantenbein, V. Hermann, J. Hogge, J. Jelonnek, J. Jin, F. Legrand, G. Lietaer, I. Pagonakis, T. Rzesnicki, M. Thumm
{"title":"Manufacturing and tests of the European 1 MW, 170 GHz CW gyrotron prototype for ITER","authors":"Y. Rozier, F. Albajar, S. Alberti, K. Avramidis, T. Bonicelli, F. Cismondi, P. Frigot, G. Gantenbein, V. Hermann, J. Hogge, J. Jelonnek, J. Jin, F. Legrand, G. Lietaer, I. Pagonakis, T. Rzesnicki, M. Thumm","doi":"10.1109/IVEC.2016.7561795","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561795","url":null,"abstract":"An industrial 1 MW, 170 GHz continuous-wave (CW) gyrotron prototype has been manufactured in 2015 at Thales. The physical design is provided by the European GYrotron Consortium (EGYC) and is supported by the construction and the measurement of a modular short-pulse (SP) prototype. In this presentation, the latest experimental results are discussed, with respect to the previous results acquired for the modular SP prototype gyrotron.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125670076","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
Designing of an O-type BWO with a metamaterial slow-wave structure 具有超材料慢波结构的o型BWO设计
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561791
S. Yurt, S. Prasad, M. Fuks, E. Schamiloglu
{"title":"Designing of an O-type BWO with a metamaterial slow-wave structure","authors":"S. Yurt, S. Prasad, M. Fuks, E. Schamiloglu","doi":"10.1109/IVEC.2016.7561791","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561791","url":null,"abstract":"The aim of this work is to design a novel metamaterial slow wave structure (SWS) for high power microwave (HPM) generation using a short pulse relativistic electron beam. The structure provides around 15% efficiency with 250 MW output power at 1.4 GHz frequency. It generates backward wave generation and beam-wave interaction with a TE21-like mode.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130554220","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
Thyratron replacement 闸流管更换
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/ivec.2016.7561837
I. Roth, M. Gaudreau, M. Kempkes
{"title":"Thyratron replacement","authors":"I. Roth, M. Gaudreau, M. Kempkes","doi":"10.1109/ivec.2016.7561837","DOIUrl":"https://doi.org/10.1109/ivec.2016.7561837","url":null,"abstract":"Thyratrons in high-power, short-pulse accelerators have a limited lifetime, making it desirable to replace the thyratrons with solid-state devices. One possibility, thyristors, are being developed for this application; they have not, to date, demonstrated the reliability needed for installation in the short pulse, high peak power RF stations used in many pulsed electron accelerators. An alternate solid-state device, the insulated-gate bipolar transistor (IGBT), readily operates at the speed needed for accelerators, but commercial IGBTs cannot handle the voltage and current required. It is, however, possible to assemble these devices in arrays to reach the required performance levels without sacrificing their inherent speed. Diversified Technologies, Inc. (DTI) has patented and refined the technology required to build these arrays of series-parallel connected switches. Under a DOE contract, DTI is currently developing an affordable, reliable, form-fit-function replacement for the klystron modulator thyratrons at Stanford Linear Accelerator Center (SLAC).","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132411743","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: 6
A wideband input/output structure for the staggered double grating sheet beam travelling wave tube 交错双光栅片束行波管的宽带输入/输出结构
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561910
Jirun Luo, Wenqiu Xie, Yu Fan, Tongli Ma, Zi-cheng Wang, Ding Zhao
{"title":"A wideband input/output structure for the staggered double grating sheet beam travelling wave tube","authors":"Jirun Luo, Wenqiu Xie, Yu Fan, Tongli Ma, Zi-cheng Wang, Ding Zhao","doi":"10.1109/IVEC.2016.7561910","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561910","url":null,"abstract":"A wideband input/output structure for the staggered double grating sheet beam traveling wave tube (SBTWT) is designed, which has the merits of simple structure, low reflection and high isolation in a wide frequency band. A design example is given for a 94GHz sheet beam travelling wave tube, the CST-MWS simulation results show the S parameters are satisfactory.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130445335","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
An improved form of Bessel functions for efficiently and accurately simulating higher order modes in a cylindrical waveguide 一种改进形式的贝塞尔函数，用于有效和准确地模拟圆柱波导中的高阶模式
2016 IEEE International Vacuum Electronics Conference (IVEC) Pub Date : 2016-04-01 DOI: 10.1109/IVEC.2016.7561940
Ming-Chieh Lin
{"title":"An improved form of Bessel functions for efficiently and accurately simulating higher order modes in a cylindrical waveguide","authors":"Ming-Chieh Lin","doi":"10.1109/IVEC.2016.7561940","DOIUrl":"https://doi.org/10.1109/IVEC.2016.7561940","url":null,"abstract":"We have found an improved form of a Bessel function for accurate and efficient numerical computation. This approximation is good for used in studying a higher order mode in a cylindrical system such as an overmoded waveguide or a fusion gyrotron cavity. The approximated solution is a fine tuned combination of a series expansion and an asymptotic form.","PeriodicalId":361429,"journal":{"name":"2016 IEEE International Vacuum Electronics Conference (IVEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127882068","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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