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.2011.5746857
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.2011.5747084
K. Senthil, S. Mitra, Archana Sharma, K. Nagesh, D. Chakravarthy
In recent years, pulsed power systems have gained importance for the pulsed electron beam generation for industrial and defense applications. High voltage Energy storage capacitors were being used widely worldwide for the pulsed power system in electric field. In case of capacitive energy storage system, the size of the system is decided by capacitor size which depends on dielectric strength and relative permittivity of the dielectric material. Similarly, an inductor can also be used to store energy in magnetic field to generate pulsed power system by making use of an opening switch. This paper discusses the initial experimental results of inductive energy storage pulsed power system being developed in the division.
{"title":"Experimental results of inductive energy storage pulsed power system using exploding wire as an opening switch","authors":"K. Senthil, S. Mitra, Archana Sharma, K. Nagesh, D. Chakravarthy","doi":"10.1109/IVEC.2011.5747084","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747084","url":null,"abstract":"In recent years, pulsed power systems have gained importance for the pulsed electron beam generation for industrial and defense applications. High voltage Energy storage capacitors were being used widely worldwide for the pulsed power system in electric field. In case of capacitive energy storage system, the size of the system is decided by capacitor size which depends on dielectric strength and relative permittivity of the dielectric material. Similarly, an inductor can also be used to store energy in magnetic field to generate pulsed power system by making use of an opening switch. This paper discusses the initial experimental results of inductive energy storage pulsed power system being developed in the division.","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":"129768351","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.2011.5746966
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.2011.5746956
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.2011.5746935
A. Latha, R. K. Gupta, S. Ghosh
Traveling-wave tubes (TWTs), used in civil and defence applications, require high power and multi-octave bandwidth rather than high efficiency and hence just a single stage depressed collector is sufficient. However, TWT used in space applications necessarily has to have very high efficiency rather than wide bandwidth. A user friendly multi-stage depressed (MDC) collector design code in MATLAB for high collector efficiency is in progress of development.
{"title":"The analytical model for multi-stage depressed collectors","authors":"A. Latha, R. K. Gupta, S. Ghosh","doi":"10.1109/IVEC.2011.5746935","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5746935","url":null,"abstract":"Traveling-wave tubes (TWTs), used in civil and defence applications, require high power and multi-octave bandwidth rather than high efficiency and hence just a single stage depressed collector is sufficient. However, TWT used in space applications necessarily has to have very high efficiency rather than wide bandwidth. A user friendly multi-stage depressed (MDC) collector design code in MATLAB for high collector efficiency is in progress of development.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"6 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":"125906591","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.2011.5747031
D. Busbaher, P. C. Smith, R. LeClair
Dispenser cathodes must operate at specific temperature while applying specific heater power. To achieve the required temperature a wire coil heater is commonly used. During the heater and cathode design process several aspects (structure rigidness, heat transfer path, uniformity of surface temperature distribution, heater and cathode life) have to be taken under consideration which makes the design difficult and costly. This paper offers an insight into study of aluminum-nitride drop-in heater package as a heating element for dispenser cathodes.
{"title":"Thermal management: Use of aluminum-nitride multilayer heaters in dispenser cathodes","authors":"D. Busbaher, P. C. Smith, R. LeClair","doi":"10.1109/IVEC.2011.5747031","DOIUrl":"https://doi.org/10.1109/IVEC.2011.5747031","url":null,"abstract":"Dispenser cathodes must operate at specific temperature while applying specific heater power. To achieve the required temperature a wire coil heater is commonly used. During the heater and cathode design process several aspects (structure rigidness, heat transfer path, uniformity of surface temperature distribution, heater and cathode life) have to be taken under consideration which makes the design difficult and costly. This paper offers an insight into study of aluminum-nitride drop-in heater package as a heating element for dispenser cathodes.","PeriodicalId":106174,"journal":{"name":"2011 IEEE International Vacuum Electronics Conference (IVEC)","volume":"60 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":"122963052","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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