Pub Date : 1998-06-07DOI: 10.1109/BEAMS.1998.822419
K. Masugata, E. Chishiro, K. Yatsui
The effect of the irradiation of leakage electrons on the anode is evaluated by using two types of different magnetic field geometry of an applied B, magnetically insulated diode. For the geometry of Type 1 where leakage electrons are is rare, the diode turns on with large delay time and the efficiency was worse. For Type 2 where initial electron irradiation of the anode occurs, the turn on delay was reduced and a high current density ion beam was obtained with higher efficiency. From the result we see that electron bombardment strongly promotes the production of an anode plasma on the flashboard. The characteristic of the magnetically insulated diode in a multi-shot operation is investigated. Ion current density (J/sub i/) decreases with increasing number of shots. The reduction of J/sub i/ is found to be mainly due to the accumulation of conductive stick matter on the flashboard.
{"title":"Characteristics of flashover ion sources in magnetically insulated ion diode","authors":"K. Masugata, E. Chishiro, K. Yatsui","doi":"10.1109/BEAMS.1998.822419","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822419","url":null,"abstract":"The effect of the irradiation of leakage electrons on the anode is evaluated by using two types of different magnetic field geometry of an applied B, magnetically insulated diode. For the geometry of Type 1 where leakage electrons are is rare, the diode turns on with large delay time and the efficiency was worse. For Type 2 where initial electron irradiation of the anode occurs, the turn on delay was reduced and a high current density ion beam was obtained with higher efficiency. From the result we see that electron bombardment strongly promotes the production of an anode plasma on the flashboard. The characteristic of the magnetically insulated diode in a multi-shot operation is investigated. Ion current density (J/sub i/) decreases with increasing number of shots. The reduction of J/sub i/ is found to be mainly due to the accumulation of conductive stick matter on the flashboard.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130127069","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.816997
M.A. Zavjalov, V.I. Perevodchikov, A. Shapiro
The main aspects of the problem of high-power broad-band gas-plasma-filled microwave device designed as a sealed tube, including beam-plasma processes, gas-dynamic system, electron optical system and cathode ion protection, are discussed. A non-relativistic beam-plasma microwave amplifier has been created to operate at output power up to 20 kW, electron efficiency 30% and pass-band width up to 30%.
{"title":"Problems of cathode design and breakdown avoidance relevant to high-power broadband gas-plasma-filled microwave sources","authors":"M.A. Zavjalov, V.I. Perevodchikov, A. Shapiro","doi":"10.1109/BEAMS.1998.816997","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.816997","url":null,"abstract":"The main aspects of the problem of high-power broad-band gas-plasma-filled microwave device designed as a sealed tube, including beam-plasma processes, gas-dynamic system, electron optical system and cathode ion protection, are discussed. A non-relativistic beam-plasma microwave amplifier has been created to operate at output power up to 20 kW, electron efficiency 30% and pass-band width up to 30%.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127536151","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822447
Y. Adamyan, V. Vasilevsky, S.N. Kolgatin, G. Shneerson
Experiments on wire explosions in strong longitudinal magnetic fields have shown that the electrical characteristics of conductor explosions are affected by the field. The presence of a longitudinal field with the induction 50-70 T shifts the moment of the explosion and changes the qualitative dependency of voltage vs. time. Previously the possibility of essential heating and acceleration of plasma caused by the generation of azimuthal currents at electrical explosion in longitudinal magnetic field has been shown. Here a one-dimensional analytic plane model illustrating the possibility and explaining the effects of acceleration and conducting media heating under its expansion across the given external field is discussed. Also the description of the experiments is presented in which this effect at the expansion of the low density gas area forming around the wire during its electrical explosion in the vacuum was observed.
{"title":"Forming of high-speed radial plasma flow due to its heating by induced azimuthal current in electrical explosion of wires in extra-high magnetic field","authors":"Y. Adamyan, V. Vasilevsky, S.N. Kolgatin, G. Shneerson","doi":"10.1109/BEAMS.1998.822447","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822447","url":null,"abstract":"Experiments on wire explosions in strong longitudinal magnetic fields have shown that the electrical characteristics of conductor explosions are affected by the field. The presence of a longitudinal field with the induction 50-70 T shifts the moment of the explosion and changes the qualitative dependency of voltage vs. time. Previously the possibility of essential heating and acceleration of plasma caused by the generation of azimuthal currents at electrical explosion in longitudinal magnetic field has been shown. Here a one-dimensional analytic plane model illustrating the possibility and explaining the effects of acceleration and conducting media heating under its expansion across the given external field is discussed. Also the description of the experiments is presented in which this effect at the expansion of the low density gas area forming around the wire during its electrical explosion in the vacuum was observed.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127629385","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822406
K. Takata, Y. H. Chin, H. Mizuno, S. Fukuda, S. Tokumoto, S. Michizono, S. Matsumoto, H. Tsutsui, S. Kazakov
X-band klystrons (XB-72K) designed for the Next Linear Collider (NLC) are described. Klystrons having traveling-wave output structures in order to reduce the electric fields and an RF output power of around 70 MW have been obtained. A new klystron-simulation code using "MAGIC" has been developed at KEK, and the simulation results agree well with the experimental data. The next klystron was designed using the code; an RF output of 120 MW is obtained in the simulation. The klystron is being manufactured and it will be tested this November.
{"title":"X-band klystron development at KEK","authors":"K. Takata, Y. H. Chin, H. Mizuno, S. Fukuda, S. Tokumoto, S. Michizono, S. Matsumoto, H. Tsutsui, S. Kazakov","doi":"10.1109/BEAMS.1998.822406","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822406","url":null,"abstract":"X-band klystrons (XB-72K) designed for the Next Linear Collider (NLC) are described. Klystrons having traveling-wave output structures in order to reduce the electric fields and an RF output power of around 70 MW have been obtained. A new klystron-simulation code using \"MAGIC\" has been developed at KEK, and the simulation results agree well with the experimental data. The next klystron was designed using the code; an RF output of 120 MW is obtained in the simulation. The klystron is being manufactured and it will be tested this November.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127792994","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822467
V. Burdovitsin, E. Oks, A. Serov
Characteristics, performance and design features of a filament-less plasma cathode electron gun for beam generation in forevacuum gas pressure range are presented, The plasma cathode is based on hollow cathode DC discharge. Using method of "grid stabilization", it was possible to generate e-beam under the background gas pressure as high as about 10/sup -1/ torr. This pressure can be easy obtained by mechanical pump. Presence of a magnetic field is one of requests for several applications, such as plasma chemistry and surface treatment processes. So operation of the gun under the B-field up to 0.1 T was investigated. It was observed an influence of the B-field both on discharge and emission parameters of the gun. The results obtained can be explained based on idea of electron confinement by magnetic field and it's motion across the B-field, With the accelerating voltage up to 8 kV the gun is able to generate of about 0.7 A DC electron beam.
{"title":"Hollow cathode electron gun for beam generation in forevacuum gas pressure","authors":"V. Burdovitsin, E. Oks, A. Serov","doi":"10.1109/BEAMS.1998.822467","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822467","url":null,"abstract":"Characteristics, performance and design features of a filament-less plasma cathode electron gun for beam generation in forevacuum gas pressure range are presented, The plasma cathode is based on hollow cathode DC discharge. Using method of \"grid stabilization\", it was possible to generate e-beam under the background gas pressure as high as about 10/sup -1/ torr. This pressure can be easy obtained by mechanical pump. Presence of a magnetic field is one of requests for several applications, such as plasma chemistry and surface treatment processes. So operation of the gun under the B-field up to 0.1 T was investigated. It was observed an influence of the B-field both on discharge and emission parameters of the gun. The results obtained can be explained based on idea of electron confinement by magnetic field and it's motion across the B-field, With the accelerating voltage up to 8 kV the gun is able to generate of about 0.7 A DC electron beam.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133215100","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.816923
V. A. Demidov, A. Demin, S. Kazakov, Y. Vlasov, V. A. Yanenko
At present the multi-element disk explosive magnetic generators (EMG) are the most powerful sources of electromagnetic energy. They allow one to obtain currents of hundreds of megaamperes and currents of hundreds of megajoules at the times of dozens of microseconds. They find application when performing pioneer experiments in the field of high energy densities, in the field of controlled thermonuclear fusion researches they can also be used for radiation generation, etc.
{"title":"Disk explosive magnetic generator with low risetime in the load","authors":"V. A. Demidov, A. Demin, S. Kazakov, Y. Vlasov, V. A. Yanenko","doi":"10.1109/BEAMS.1998.816923","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.816923","url":null,"abstract":"At present the multi-element disk explosive magnetic generators (EMG) are the most powerful sources of electromagnetic energy. They allow one to obtain currents of hundreds of megaamperes and currents of hundreds of megajoules at the times of dozens of microseconds. They find application when performing pioneer experiments in the field of high energy densities, in the field of controlled thermonuclear fusion researches they can also be used for radiation generation, etc.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122918726","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.816938
A.M. Bujko, V. Chernyshev, S. F. Garanin, Y. Gorbachev, V. Demidov, G. G. Ivanova, V.N. Kostyukov, S. Kuznetsov, A.I. Kuzyaev, A. B. Mezhevov, V. Mokhov, A. Petrukhin, V. N. Sofronov, A. I. Startsev, V. B. Yakubov, B. Anderson, C. Ekdahl, J.L. Kammerdiener, I. Lindemuth, R. Reinovsky, P. Rodriguez, L. Veeser, S. Younger, W.D. Zerwekh, D. A. Poling, R.C. Kirkpatirck, T. Englert, G. Kiuttu
High power pulsed energy sources are required to produce a large amount of X-rays. The leading role in creation of ultra-high power stationary machines belongs to the USA national laboratories. VNIIEF has made much progress in creation of ultra-high power explosive magnetic generators (EMG) of a single action, which allow experiments up to 200 MJ of the stored energy and up to 10/sup 13/ W of the power in the load.
{"title":"The study of variable mass liner acceleration in order to create the source of soft X-rays","authors":"A.M. Bujko, V. Chernyshev, S. F. Garanin, Y. Gorbachev, V. Demidov, G. G. Ivanova, V.N. Kostyukov, S. Kuznetsov, A.I. Kuzyaev, A. B. Mezhevov, V. Mokhov, A. Petrukhin, V. N. Sofronov, A. I. Startsev, V. B. Yakubov, B. Anderson, C. Ekdahl, J.L. Kammerdiener, I. Lindemuth, R. Reinovsky, P. Rodriguez, L. Veeser, S. Younger, W.D. Zerwekh, D. A. Poling, R.C. Kirkpatirck, T. Englert, G. Kiuttu","doi":"10.1109/BEAMS.1998.816938","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.816938","url":null,"abstract":"High power pulsed energy sources are required to produce a large amount of X-rays. The leading role in creation of ultra-high power stationary machines belongs to the USA national laboratories. VNIIEF has made much progress in creation of ultra-high power explosive magnetic generators (EMG) of a single action, which allow experiments up to 200 MJ of the stored energy and up to 10/sup 13/ W of the power in the load.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127630183","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822458
Y. Krasik, A. Dunaevsky, J. Felsteiner
In this report we present experimental data concerning the use of various plasma sources to generate high-power, high-current electron beams in a repetitive mode instead of explosive emission plasma. The concept of this research is in the plasma creation prior to the application of the acceleration voltage to the anode-cathode gap, and in the achievement of the condition when the space-charge limiting electron current density is equal to the electron plasma saturation current density. It has been shown that it is possible to generate electron beams without creation of explosive plasma and without the time delay with respect to the beginning of the acceleration voltage. This can be achieved by the proper adjustment of the plasma parameters to the diode geometry and to the amplitude of the acceleration voltage. Experimental results of generation of electron beams with current density of 100 A/cm/sup 2/, and electron energy of 40 kV continuously with repetition rate of 2 Hz are presented.
{"title":"Generation of high-current electron beams by the use of plasma cathodes","authors":"Y. Krasik, A. Dunaevsky, J. Felsteiner","doi":"10.1109/BEAMS.1998.822458","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822458","url":null,"abstract":"In this report we present experimental data concerning the use of various plasma sources to generate high-power, high-current electron beams in a repetitive mode instead of explosive emission plasma. The concept of this research is in the plasma creation prior to the application of the acceleration voltage to the anode-cathode gap, and in the achievement of the condition when the space-charge limiting electron current density is equal to the electron plasma saturation current density. It has been shown that it is possible to generate electron beams without creation of explosive plasma and without the time delay with respect to the beginning of the acceleration voltage. This can be achieved by the proper adjustment of the plasma parameters to the diode geometry and to the amplitude of the acceleration voltage. Experimental results of generation of electron beams with current density of 100 A/cm/sup 2/, and electron energy of 40 kV continuously with repetition rate of 2 Hz are presented.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116933746","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822433
I. Lisitsyn, S. Kohno, Y. Teramoto, S. Katsuki, H. Akiyama
A novel pulsed power generator using the inductive voltage adder technology was put into operation in Kumamoto University. This machine, named "ASO-X", is an inductive voltage adder-inductive energy storage pulsed power system. The maximum output voltage and current of ASO-X are 180 kV and 400 kA respectively at the short circuit load with 1.3 /spl mu/s of current quarter period. To increase the voltage, power and decrease the rise time of the load current, the plasma opening switch is used at the output of ASO-X. Eight plasma guns, serve for the plasma source of the opening switch in the scheme of with the single triggered gap switch. This system provides very fast current rise rate of 3.6/spl times/10/sup 12/ A/s at over 1 /spl mu/s of conduction time of the plasma opening switch.
{"title":"400 kA inductive voltage adder-inductive energy storage pulsed power generator ASO-X","authors":"I. Lisitsyn, S. Kohno, Y. Teramoto, S. Katsuki, H. Akiyama","doi":"10.1109/BEAMS.1998.822433","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822433","url":null,"abstract":"A novel pulsed power generator using the inductive voltage adder technology was put into operation in Kumamoto University. This machine, named \"ASO-X\", is an inductive voltage adder-inductive energy storage pulsed power system. The maximum output voltage and current of ASO-X are 180 kV and 400 kA respectively at the short circuit load with 1.3 /spl mu/s of current quarter period. To increase the voltage, power and decrease the rise time of the load current, the plasma opening switch is used at the output of ASO-X. Eight plasma guns, serve for the plasma source of the opening switch in the scheme of with the single triggered gap switch. This system provides very fast current rise rate of 3.6/spl times/10/sup 12/ A/s at over 1 /spl mu/s of conduction time of the plasma opening switch.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114184494","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 : 1998-06-07DOI: 10.1109/BEAMS.1998.822454
R. Ando, S. Taniguchi, K. Kamada, M. Masuzaki, I. Onishchenko
A study of IREB-driven strong Langmuir turbulence fields in a plasma after the IREB passed through the plasma was carried out by measuring deflection of a weak low-energy electron probe beam injected across the plasma. The preliminary results are discussed here.
{"title":"Measurement of strong Langmuir turbulence fields using an electron beam probe","authors":"R. Ando, S. Taniguchi, K. Kamada, M. Masuzaki, I. Onishchenko","doi":"10.1109/BEAMS.1998.822454","DOIUrl":"https://doi.org/10.1109/BEAMS.1998.822454","url":null,"abstract":"A study of IREB-driven strong Langmuir turbulence fields in a plasma after the IREB passed through the plasma was carried out by measuring deflection of a weak low-energy electron probe beam injected across the plasma. The preliminary results are discussed here.","PeriodicalId":410823,"journal":{"name":"12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114188928","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：