Pub Date : 2011-02-21DOI: 10.1109/IVEC.2011.5746996
V. Srivastava
Accurate and fast SUNRAY-2.5D code has been developed for multi-signal large signal analysis of a complete helix TWT. Ring model of electron beam was used and relativistic equations of motion were solved with variable focusing field, circuit loss and pitch profiles. Improved expressions of the circuit field and induced voltages were developed. Complete RF output and beam performance including higher harmonics, inter-modulation components, beam interception were simulated. It is fast and accurate and has been validated with experimental results of several broadband and high efficiency TWTs. Agreement for saturated output power is achieved within 0.5dB and for saturated gain within 2dB. High efficiency TWTs at different frequency bands have been designed using this code. Spent beam data generated by the code has been used for the design of multi-stage collectors, accurately for space TWTs.
{"title":"SUNRAY-2.5 D code for multi-signal large-signal analysis of a complete helix TWT","authors":"V. Srivastava","doi":"10.1109/IVEC.2011.5746996","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746996","url":null,"abstract":"Accurate and fast SUNRAY-2.5D code has been developed for multi-signal large signal analysis of a complete helix TWT. Ring model of electron beam was used and relativistic equations of motion were solved with variable focusing field, circuit loss and pitch profiles. Improved expressions of the circuit field and induced voltages were developed. Complete RF output and beam performance including higher harmonics, inter-modulation components, beam interception were simulated. It is fast and accurate and has been validated with experimental results of several broadband and high efficiency TWTs. Agreement for saturated output power is achieved within 0.5dB and for saturated gain within 2dB. High efficiency TWTs at different frequency bands have been designed using this code. Spent beam data generated by the code has been used for the design of multi-stage collectors, accurately for space TWTs.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122585043","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746982
A. Baig, D. Gamzina, Micheal Johnson, C. Domier, A. Spear, L. Barnett, N. Luhmann, Y. Shin
In this paper we report precision MEMS Fabrication using novel LIGA technique for 0.22 THz micro-metallic staggered double-vane TWT circuits. For this high aspect ratio structure negative tone photo-resist KMPR was used. The entire fabrication process starting from spin coating, UV-lithography, electroforming and mold removal processing was fully characterized. Finally, the high tolerance TWT structure with smoothness (50–80 nm) was aligned in a specially engineered fixture for RF measurements in the BWO range 165–270GHz. The experiment showed excellent transmission 5–8 dB in frequency range 210–265 GHz. This result showed a distinct potential of applying this precision fabrication technique for the mass production of THz sources.
{"title":"Experimental characterization of LIGA fabricated 0.22 THz TWT circuits","authors":"A. Baig, D. Gamzina, Micheal Johnson, C. Domier, A. Spear, L. Barnett, N. Luhmann, Y. Shin","doi":"10.1109/IVEC.2011.5746982","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746982","url":null,"abstract":"In this paper we report precision MEMS Fabrication using novel LIGA technique for 0.22 THz micro-metallic staggered double-vane TWT circuits. For this high aspect ratio structure negative tone photo-resist KMPR was used. The entire fabrication process starting from spin coating, UV-lithography, electroforming and mold removal processing was fully characterized. Finally, the high tolerance TWT structure with smoothness (50–80 nm) was aligned in a specially engineered fixture for RF measurements in the BWO range 165–270GHz. The experiment showed excellent transmission 5–8 dB in frequency range 210–265 GHz. This result showed a distinct potential of applying this precision fabrication technique for the mass production of THz sources.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122586831","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746973
S. Kolosov, A. Kurayev, A. Senko
Possibility of constructing Gyro-TWT with high gain are considered. Presented designs of Gyro-TWT for first and second harmonics of the cyclotron frequency and the frequency multiplier from the first harmonic to second harmonic of the cyclotron frequency. The analysis of influence of goffering absorbing section of GYRO-TWT on the gain and efficiency of the device.
{"title":"Amplifiers and multipliers on GYRO-TWT","authors":"S. Kolosov, A. Kurayev, A. Senko","doi":"10.1109/IVEC.2011.5746973","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746973","url":null,"abstract":"Possibility of constructing Gyro-TWT with high gain are considered. Presented designs of Gyro-TWT for first and second harmonics of the cyclotron frequency and the frequency multiplier from the first harmonic to second harmonic of the cyclotron frequency. The analysis of influence of goffering absorbing section of GYRO-TWT on the gain and efficiency of the device.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124179065","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5747052
S. Basu, S. Desai, Archana Sharma, S. Mitra, K. Nagesh, M. Kulkarni, D. Chakravarthy
In recent years pulsed power activity has gained wide spread importance in the field of defense & research. With involvement of energy storage capacitors, inductors, the generation, and consequent effective utilization of magnetic fields becomes inevitable in these spheres of research. Interaction process using magnetic fields has tremendous importance in every domain of physics. The present work involves a reliable measurement of pulsed magnetic field with search coil (inductive principle) and a novel method of calibrating the same. Both experimental and simulation results are presented, which are in close agreement.
{"title":"Pulsed magnetic field measurement outside finite long solenoid implementing novel calibration technique","authors":"S. Basu, S. Desai, Archana Sharma, S. Mitra, K. Nagesh, M. Kulkarni, D. Chakravarthy","doi":"10.1109/IVEC.2011.5747052","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747052","url":null,"abstract":"In recent years pulsed power activity has gained wide spread importance in the field of defense & research. With involvement of energy storage capacitors, inductors, the generation, and consequent effective utilization of magnetic fields becomes inevitable in these spheres of research. Interaction process using magnetic fields has tremendous importance in every domain of physics. The present work involves a reliable measurement of pulsed magnetic field with search coil (inductive principle) and a novel method of calibrating the same. Both experimental and simulation results are presented, which are in close agreement.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124436314","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746944
S. K. Chhotray, M. Sumathy, K. S. Bhat, L. Kumar
A new geometry of a matched termination using lossy dielectric materials for an overmoded cylindrical waveguide is explored in this present work. The matched termination is designed based on attenuating the microwave using lossy dielectric materials or resistive materials by numerical simulation. The geometry is optimized such that it can be used for a cylindrical waveguide operating on fundamental and other higher order modes. The matched termination is fabricated and tested for its characteristics and the results are validated against simulated values.
{"title":"Design of a broad band matched termination for an overmoded waveguide","authors":"S. K. Chhotray, M. Sumathy, K. S. Bhat, L. Kumar","doi":"10.1109/IVEC.2011.5746944","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746944","url":null,"abstract":"A new geometry of a matched termination using lossy dielectric materials for an overmoded cylindrical waveguide is explored in this present work. The matched termination is designed based on attenuating the microwave using lossy dielectric materials or resistive materials by numerical simulation. The geometry is optimized such that it can be used for a cylindrical waveguide operating on fundamental and other higher order modes. The matched termination is fabricated and tested for its characteristics and the results are validated against simulated values.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124549751","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746904
Li Xu, Zhen Ye, Zhonghai Yang, Jianqing Li, Bin Li
This paper presents the application of hierarchical vector finite element method (FEM) with second-order basis for modeling slow-wave structures (SWSs) in microwave tubes, and consequently, a robust, fast and efficient multigrid eigensolver (MGES) is developed to simulate the SWSs.
{"title":"A fast and efficient multigrid eigensolver for modeling microwave tubes using hierarchical vector finite elements","authors":"Li Xu, Zhen Ye, Zhonghai Yang, Jianqing Li, Bin Li","doi":"10.1109/IVEC.2011.5746904","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746904","url":null,"abstract":"This paper presents the application of hierarchical vector finite element method (FEM) with second-order basis for modeling slow-wave structures (SWSs) in microwave tubes, and consequently, a robust, fast and efficient multigrid eigensolver (MGES) is developed to simulate the SWSs.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124569301","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5747063
A. A. Borisov, U. A. Budzinsky, S. Bykovsky, A. Galdetskiy, A. Korolev, M. I. Lopin, A. A. Negirev, V. Pugnin, G. V. Ruvinsky, B. Sazonov
Activity of Istok in the development and manufacturing of vacuum microwave devices is briefly described.
简要介绍了Istok在真空微波器件开发和制造方面的活动。
{"title":"The development of vacuum microwave devices in Istok","authors":"A. A. Borisov, U. A. Budzinsky, S. Bykovsky, A. Galdetskiy, A. Korolev, M. I. Lopin, A. A. Negirev, V. Pugnin, G. V. Ruvinsky, B. Sazonov","doi":"10.1109/IVEC.2011.5747063","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747063","url":null,"abstract":"Activity of Istok in the development and manufacturing of vacuum microwave devices is briefly described.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121387988","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746856
S. Raina, A. K. Agrawal, M. Kumar, Ashok Bansiwal, M. Geetha, George Abraham, K.Praveen kumar, L. Kumar
This paper briefly presents the details of the design of a K-Ka band, 40W CW, millimeter-wave helix TWT. Sub-system level design and TWT development issues are also presented.
{"title":"Design of a K-Ka band helix TWT","authors":"S. Raina, A. K. Agrawal, M. Kumar, Ashok Bansiwal, M. Geetha, George Abraham, K.Praveen kumar, L. Kumar","doi":"10.1109/IVEC.2011.5746856","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746856","url":null,"abstract":"This paper briefly presents the details of the design of a K-Ka band, 40W CW, millimeter-wave helix TWT. Sub-system level design and TWT development issues are also presented.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128618363","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5747008
M. Pande, S. Shrotriya, Sonal Sharma, N. Patel, V. Handu
As a part of ADS program a proton accelerator (20 MeV, 30 mA) and its high power RF systems (HPRF) are being developed in BARC. This paper explains design details of this klystron based HPRF system.
{"title":"Klystron based high power RF system for proton accelerator","authors":"M. Pande, S. Shrotriya, Sonal Sharma, N. Patel, V. Handu","doi":"10.1109/IVEC.2011.5747008","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747008","url":null,"abstract":"As a part of ADS program a proton accelerator (20 MeV, 30 mA) and its high power RF systems (HPRF) are being developed in BARC. This paper explains design details of this klystron based HPRF system.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114278033","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 : 2011-02-21DOI: 10.1109/IVEC.2011.5746906
K. Lukin, E. Khutoryan
Self-oscillations in multimode Clinotron have been investigated. The effects taking place due to modes interaction have been analyzed.
研究了多模回旋加速器的自振荡问题。分析了模态相互作用所产生的影响。
{"title":"Mode interaction in resonant Clinotron","authors":"K. Lukin, E. Khutoryan","doi":"10.1109/IVEC.2011.5746906","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746906","url":null,"abstract":"Self-oscillations in multimode Clinotron have been investigated. The effects taking place due to modes interaction have been analyzed.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114529403","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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