Pub Date : 2011-02-21DOI: 10.1109/IVEC.2011.5746956
P. Rao, V. A. Deshmukh, S. K. Datta
An equivalent circuit analysis of a plasma-filled helical slow-wave structure immersed in a strong longitudinal magnetic field was developed to analyze the dispersion characteristics of the structure. The analysis predicted the formation of hybrid-plasma slow waves in the structure and the enhancement of longitudinal electric field inside the helix for facilitating strong beam-wave interaction in a device like a plasma-filled traveling-wave tube.
{"title":"Equivalent circuit analysis of a plasma-filled helix slow-wave structure","authors":"P. Rao, V. A. Deshmukh, S. K. Datta","doi":"10.1109/IVEC.2011.5746956","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746956","url":null,"abstract":"An equivalent circuit analysis of a plasma-filled helical slow-wave structure immersed in a strong longitudinal magnetic field was developed to analyze the dispersion characteristics of the structure. The analysis predicted the formation of hybrid-plasma slow waves in the structure and the enhancement of longitudinal electric field inside the helix for facilitating strong beam-wave interaction in a device like a plasma-filled traveling-wave tube.","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":"129612903","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.2011.5746857
L. M. Joshi, R. Meena, S. Nangru, D. Kant, D. Pal, O. S. Lamba, V. Jindal, S. Jangid, D. Chakravarthy, K. Dixit
A 6 MW peak, 24 kW average power Sband Klystron is under development at CEERI, Pilani under an MoU between BARC and CEERI. The design of the klystron has been completed. The electron gun has been designed using TRAK and MAGIC codes. RF cavities have been designed using HFSS and CST Microwave Studio while the complete beam wave interaction simulation has been done using MAGIC code. The thermal design of collector and RF window has been done using ANSYS code. A Gun Collector Test Module (GCTM) was developed before making actual klystron to validate gun perveance and thermal design of collector. A high voltage solid state pulsed modulator has been installed for performance evaluation of the tube. The paper will cover the design aspects of the tube and experimental test results of GCTM and klystron.
{"title":"Design and development of a 6 MW peak, 24 kW average power S-band Klystron","authors":"L. M. Joshi, R. Meena, S. Nangru, D. Kant, D. Pal, O. S. Lamba, V. Jindal, S. Jangid, D. Chakravarthy, K. Dixit","doi":"10.1109/IVEC.2011.5746857","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746857","url":null,"abstract":"A 6 MW peak, 24 kW average power Sband Klystron is under development at CEERI, Pilani under an MoU between BARC and CEERI. The design of the klystron has been completed. The electron gun has been designed using TRAK and MAGIC codes. RF cavities have been designed using HFSS and CST Microwave Studio while the complete beam wave interaction simulation has been done using MAGIC code. The thermal design of collector and RF window has been done using ANSYS code. A Gun Collector Test Module (GCTM) was developed before making actual klystron to validate gun perveance and thermal design of collector. A high voltage solid state pulsed modulator has been installed for performance evaluation of the tube. The paper will cover the design aspects of the tube and experimental test results of GCTM and klystron.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"13 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":"128011252","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.2011.5746891
A. Jensen, C. Adolphsen, K. Bane, A. Burke, A. Haase, E. Jongewaard, Z. Li, D. Martin, D. Sprehn, G. Stupakov
A review of L-band sheet beam development at SLAC National Accelerator Laboratory's Klystron Department. The measured current density profile of a 40:1 elliptical beam is presented. A review of instabilities discovered while simulating the klystron are presented.
{"title":"Stability review of SLAC's L-band sheet beam klystron","authors":"A. Jensen, C. Adolphsen, K. Bane, A. Burke, A. Haase, E. Jongewaard, Z. Li, D. Martin, D. Sprehn, G. Stupakov","doi":"10.1109/IVEC.2011.5746891","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746891","url":null,"abstract":"A review of L-band sheet beam development at SLAC National Accelerator Laboratory's Klystron Department. The measured current density profile of a 40:1 elliptical beam is presented. A review of instabilities discovered while simulating the klystron are presented.","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":"130578400","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.2011.5747067
M. Franzi, R. Gilgenbach, D. French, B. Hoff, Y. Lau, D. Simon, J. Luginsland
The Recirculating Planar Magnetron (RPM) is a novel crossed-field device whose geometry is expected to reduce thermal load, enhance current yield as well as ease the geometric limitations in scaling to high RF frequencies as compared to the conventional cylindrical magnetrons [1]. The RPM has two different adaptations:
{"title":"Recirculating planar magnetrons: Simulations and experiment","authors":"M. Franzi, R. Gilgenbach, D. French, B. Hoff, Y. Lau, D. Simon, J. Luginsland","doi":"10.1109/IVEC.2011.5747067","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747067","url":null,"abstract":"The Recirculating Planar Magnetron (RPM) is a novel crossed-field device whose geometry is expected to reduce thermal load, enhance current yield as well as ease the geometric limitations in scaling to high RF frequencies as compared to the conventional cylindrical magnetrons [1]. The RPM has two different adaptations:","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"306 4 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":"121160108","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.2011.5746890
C. Ruan, Shuzhong Wang, W. Ruan, Xiaofeng Zhang
In this paper, the development of W-band sheet beam klystron has been introduced with high transmission rate beam and a 2-dimensional code SBK2D calculation. The ellipse cathode and electrode structure is used to form the sheet electron beam with the beam aspect ratio about 25:1. And the uniform magnetic system is used to transport the sheet electron beam with the drift tube length about 100mm. After the sheet beam tube is manufactured, the transmission rate and cross-section experiment are performed. With the beam voltage of 20–82 kV, and beam current of 0.5–4.2A, the transmission rate is more than 98%, and the beam cross-section is about 10×0.5mm2. Then the sheet electron beam wave interaction process with 4 single-gap and 4 multi-gap cavities are calculated using the 2-dimensional code SBK2D based on the rod shape macro-particle model, the 55kW high frequency output with the efficiency of 20% and gain of 40 dB are observed at the frequency of 94.5 GHz.
{"title":"Development of W-band sheet beam klystron with high transmission rate electron optics system","authors":"C. Ruan, Shuzhong Wang, W. Ruan, Xiaofeng Zhang","doi":"10.1109/IVEC.2011.5746890","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746890","url":null,"abstract":"In this paper, the development of W-band sheet beam klystron has been introduced with high transmission rate beam and a 2-dimensional code SBK2D calculation. The ellipse cathode and electrode structure is used to form the sheet electron beam with the beam aspect ratio about 25:1. And the uniform magnetic system is used to transport the sheet electron beam with the drift tube length about 100mm. After the sheet beam tube is manufactured, the transmission rate and cross-section experiment are performed. With the beam voltage of 20–82 kV, and beam current of 0.5–4.2A, the transmission rate is more than 98%, and the beam cross-section is about 10×0.5mm2. Then the sheet electron beam wave interaction process with 4 single-gap and 4 multi-gap cavities are calculated using the 2-dimensional code SBK2D based on the rod shape macro-particle model, the 55kW high frequency output with the efficiency of 20% and gain of 40 dB are observed at the frequency of 94.5 GHz.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"33 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":"127971111","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.2011.5746899
M. Kartikeyan, E. Borie, M. Thumm
In this paper, our collaborative efforts on the design of specific high power gyrotrons that are being carried out at IIT-Roorkee and KIT will be presented. An up-date of our design studies on (i) a 42 GHz, 200–250 kW, long pulse / CW gyrotron (with up-tapered resonator section) for Indian Tokamak applications and (ii) CW/longpulse gyrotrons (conventional cavity version) at 170 GHz for ITER and ITER-like machines. Recent results on the design studies of these specific gyrotrons will be summed up comprehensively and future plans are discussed in this paper.
{"title":"Recent results in collaborative studies on the design of application specific gyrotrons","authors":"M. Kartikeyan, E. Borie, M. Thumm","doi":"10.1109/IVEC.2011.5746899","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746899","url":null,"abstract":"In this paper, our collaborative efforts on the design of specific high power gyrotrons that are being carried out at IIT-Roorkee and KIT will be presented. An up-date of our design studies on (i) a 42 GHz, 200–250 kW, long pulse / CW gyrotron (with up-tapered resonator section) for Indian Tokamak applications and (ii) CW/longpulse gyrotrons (conventional cavity version) at 170 GHz for ITER and ITER-like machines. Recent results on the design studies of these specific gyrotrons will be summed up comprehensively and future plans are discussed in this paper.","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":"129020835","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.2011.5746855
Y. Hu, Jinjun Feng, Jun Cai, Yinhua Du, Ye Tang, Xianping Wu
Backward wave oscillation (BWO) and other parasitic oscillation are encountered in the process of manufacturing W-band TWT. In order to eliminate the oscillation, a kind of attenuation material is coated to the folded waveguide wall. This method presents a good performance to enable stable working of the TWT and increase the output power to 15W at the same drive level.
{"title":"Performance enhancement of W-band CW TWT","authors":"Y. Hu, Jinjun Feng, Jun Cai, Yinhua Du, Ye Tang, Xianping Wu","doi":"10.1109/IVEC.2011.5746855","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746855","url":null,"abstract":"Backward wave oscillation (BWO) and other parasitic oscillation are encountered in the process of manufacturing W-band TWT. In order to eliminate the oscillation, a kind of attenuation material is coated to the folded waveguide wall. This method presents a good performance to enable stable working of the TWT and increase the output power to 15W at the same drive level.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"99 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":"132298123","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.2011.5746966
Baoli Shen, Zhaochuan Zhang, Yunping Huang
A box window used in an S-band high average power klystron is designed by ISFEL3D and HFSS. The cold-test results show that VSWR of the box window is less than 1.1 and the vertical electric field modes are out of the working bandwidth. The hot-test results of the full klystron prove that the box window can endure the average power of more than 22kW and the peek power of more than 1.1MW, and that there are no modes to bowl over the window piece. Therefore, the designing method of the box window is correct.
{"title":"Design of a S-band high average power klystron's output window","authors":"Baoli Shen, Zhaochuan Zhang, Yunping Huang","doi":"10.1109/IVEC.2011.5746966","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746966","url":null,"abstract":"A box window used in an S-band high average power klystron is designed by ISFEL3D and HFSS. The cold-test results show that VSWR of the box window is less than 1.1 and the vertical electric field modes are out of the working bandwidth. The hot-test results of the full klystron prove that the box window can endure the average power of more than 22kW and the peek power of more than 1.1MW, and that there are no modes to bowl over the window piece. Therefore, the designing method of the box window is correct.","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":"131024213","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.2011.5746848
M. Petelin
Being squeezed by competitors, the vacuum microwave electronics is made to enhance output powers, that should be provided with using sufficiently high beam voltages. The resulting increase of electron velocities is accompanied with a number of favorable relativistic effects.
{"title":"Relativistic effects in microwave vacuum electronics","authors":"M. Petelin","doi":"10.1109/IVEC.2011.5746848","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746848","url":null,"abstract":"Being squeezed by competitors, the vacuum microwave electronics is made to enhance output powers, that should be provided with using sufficiently high beam voltages. The resulting increase of electron velocities is accompanied with a number of favorable relativistic effects.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"179 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114049303","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.2011.5746889
I. Chernyavskiy, A. Vlasov, T. Antonsen, D. Chernin, B. Levush, M. Hyttinen, A. Roitman, P. Horoyski, R. Dobbs, D. Berry
The large-signal code TESLA (Telegraphist's Equations Solution for Linear-beam Amplifiers) was originally developed for the analysis and design of klystrons. It has now been applied to the simulations of an extended interaction klystron (EIK) for the first time. Results for the power transfer curve and bandwidth curves computed for a G-band EIK compare well to their measured values. TESLA obtains these results almost two orders of magnitude faster than a 3D particle-in-cell simulation code.
{"title":"Validation study of the TESLA model for extended interaction klystron","authors":"I. Chernyavskiy, A. Vlasov, T. Antonsen, D. Chernin, B. Levush, M. Hyttinen, A. Roitman, P. Horoyski, R. Dobbs, D. Berry","doi":"10.1109/IVEC.2011.5746889","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746889","url":null,"abstract":"The large-signal code TESLA (Telegraphist's Equations Solution for Linear-beam Amplifiers) was originally developed for the analysis and design of klystrons. It has now been applied to the simulations of an extended interaction klystron (EIK) for the first time. Results for the power transfer curve and bandwidth curves computed for a G-band EIK compare well to their measured values. TESLA obtains these results almost two orders of magnitude faster than a 3D particle-in-cell simulation code.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"43 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":"122549223","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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