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Increase of Plasma Opening Switch conduction phase duration 等离子体开启开关传导相位持续时间的增加
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-20 DOI: 10.1109/PPPS.2001.1001829
N. Barinov, G. I. Dolgachev, D. D. Maslennikov
{"title":"Increase of Plasma Opening Switch conduction phase duration","authors":"N. Barinov, G. I. Dolgachev, D. D. Maslennikov","doi":"10.1109/PPPS.2001.1001829","DOIUrl":"https://doi.org/10.1109/PPPS.2001.1001829","url":null,"abstract":"A creation of the Plasma Opening Switch with a conduction time up to tens of microseconds has a significant importance for the BAIKAL research program which plans using a high current generator with long duration prepulse. To increase the conduction phase various scenarios of POS gap filling with plasma are planned. This includes in series connection of plasma guns. The results of experiments aimed to increasing the charge coming through the POS during the conduction phase are reported at 200 kV Marx generator voltage, 120 kA drive current. And 1 µs current rise time. The prepulse was created by a specially designed pulse forming system.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114173600","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
Plasma opening switch with isolation by extrinsic magnetic field 外加磁场隔离等离子体开孔开关
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-20 DOI: 10.1109/PPPS.2001.1001827
N. Barinov, G. I. Dolgachev, D. D. Maslennikov
{"title":"Plasma opening switch with isolation by extrinsic magnetic field","authors":"N. Barinov, G. I. Dolgachev, D. D. Maslennikov","doi":"10.1109/PPPS.2001.1001827","DOIUrl":"https://doi.org/10.1109/PPPS.2001.1001827","url":null,"abstract":"The paper demonstrates recent experiments at RS-20 (1 MV, 350 kA, 2 µs) pulse power generator with the plasma opening switch (POS) operating in the extrinsic magnetic field. The influence of the current density and the transmitted charge on the switching voltage at POS is discussed. POS voltage as a function of the Marx voltage under optimal current density and the transmitted charge is examined and extrapolated for greater values. A scheme of voltage composition is for two POS generators is discussed.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116768198","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
Numerical simulation of foil acceleration by intense pulsed ion beam 强脉冲离子束对箔片加速度的数值模拟
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-19 DOI: 10.2514/6.2000-2272
M. Yazawa, K. Kashine, W. Jiang, K. Yatsui, N. Harada
{"title":"Numerical simulation of foil acceleration by intense pulsed ion beam","authors":"M. Yazawa, K. Kashine, W. Jiang, K. Yatsui, N. Harada","doi":"10.2514/6.2000-2272","DOIUrl":"https://doi.org/10.2514/6.2000-2272","url":null,"abstract":"When we irradiate an intense pulsed ion beam to a foil, ablation plasma is created, and the foil is accelerated. In this paper, we developed a numerical model of this phenomenon. We analyze temperature and pressure of the ablation plasma, and velocity of the accelerated foil by the numerical simulation. It was possible for us to analyze a behavior and detailed results of the ablation plasma expansion and acceleration of the foil. We could also observe the processes of the ablation plasma expansion and acceleration of the foil by the back lighting high-speed photography. The calculated results of foil velocity agree well with experimental ones over the wide range of energy density of an ion beam. We analyzed time trend of the foil velocity. And we could see that the foil is rapidly accelerated just after delay.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127399083","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: 3
Suppression of ion emission and pinching using heated tantalum anodes in high-power electron-beam diodes 在高功率电子束二极管中使用加热钽阳极抑制离子发射和挤压
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-04 DOI: 10.1109/PLASMA.2000.854835
B. Weber, S. Stephanakis, D. Black, G. Cooperstein, N. Pereira
{"title":"Suppression of ion emission and pinching using heated tantalum anodes in high-power electron-beam diodes","authors":"B. Weber, S. Stephanakis, D. Black, G. Cooperstein, N. Pereira","doi":"10.1109/PLASMA.2000.854835","DOIUrl":"https://doi.org/10.1109/PLASMA.2000.854835","url":null,"abstract":"Pulse-heating tantalum anodes to > 2200 K results in drastic changes to ion emission and beam dynamics. The ion current starts later, the peak ion current is reduced, and beam pinching is suppressed or eliminated. The diode current follows a single-species Child-Langmuir formula until the voltage exceeds 1 MV, then follows a critical current formula, indicating that ions have little effect on the diode impedance. The experiments indicate a definite dependence on different heating procedures. This technique can be used to improved x-ray production on high-power generators such as Decade.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"93 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120868016","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
Uniform-fill nozzles for long-implosion-time prs experiments 用于长内爆时间prs实验的均匀填充喷嘴
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-04 DOI: 10.1109/PLASMA.2000.855120
J. Levine, P. Coleman, B. Failor, A. Fisher, S. Lam, J. Riordan, Y. Song, H. Sze, J. Apruzese, F. Cochran, J. Davis, B. Moosman, J. Thornhill, A. Velikovich, B. Weber, K. Whitney, C. Coverdale, C. Deeney, J. McGurn, D. Bell, R. Schneider
{"title":"Uniform-fill nozzles for long-implosion-time prs experiments","authors":"J. Levine, P. Coleman, B. Failor, A. Fisher, S. Lam, J. Riordan, Y. Song, H. Sze, J. Apruzese, F. Cochran, J. Davis, B. Moosman, J. Thornhill, A. Velikovich, B. Weber, K. Whitney, C. Coverdale, C. Deeney, J. McGurn, D. Bell, R. Schneider","doi":"10.1109/PLASMA.2000.855120","DOIUrl":"https://doi.org/10.1109/PLASMA.2000.855120","url":null,"abstract":"We have developed uniform-fill nozzles for long-implosion PRS experiments to produce argon K-shell x-rays (photon energy > 3.1 keV). With a 7 cm diameter nozzle, which is appropriate for a 200 ns driver, we have achieved a stable implosion at 180 ns and 4 MA with peak argon K-shell yields exceeding 15 kJ. As previously seen with short (∼100 ns) implosion times, the K-shell yield scales as the fourth power of peak current, I4. Limited testing with a 10 cm nozzle, which is appropriate for a >250 ns driver, has also achieved a stable implosion.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132181747","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
Gas puff implosion measurements and modeling 气体喷涌内爆测量和建模
2000 13th International Conference on High-Power Particle Beams Pub Date : 2000-06-04 DOI: 10.1109/PLASMA.2000.855119
B. Moosman, J. R. Boller, R. Commisso, D. Hinshelwood, D. Mosher, S. Stephanakis, B. Weber, N. Qi, J. Schein, M. McFarland, R. Prasad, M. Krishnan
{"title":"Gas puff implosion measurements and modeling","authors":"B. Moosman, J. R. Boller, R. Commisso, D. Hinshelwood, D. Mosher, S. Stephanakis, B. Weber, N. Qi, J. Schein, M. McFarland, R. Prasad, M. Krishnan","doi":"10.1109/PLASMA.2000.855119","DOIUrl":"https://doi.org/10.1109/PLASMA.2000.855119","url":null,"abstract":"Two-dimensional interferometric images obtained in gas-puff z-pinch experiments on the Hawk generator are compared with snowplow calculations using the measured gas distribution for various times during the 250-ns implosion. To match the calculated implosion time with the observed implosion time, 88% to 101% of the measured cathode current, adjusted for each shot, is required to implode the snowplow. The snowplow model reproduces the (r,z) shape of the measured 2-D plasma shell at different times during the implosion. The inferred current loss between the measurement location (17-cm upstream of the nozzle) and the z-pinch may be due to vacuum flow resulting from the plasma-opening switch.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132316376","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: 5
High power microwave generation by a coaxial vircator 用同轴促动器产生高功率微波
2000 13th International Conference on High-Power Particle Beams Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.825445
W. Jiang, J. Dickens, M. Kristiansen
{"title":"High power microwave generation by a coaxial vircator","authors":"W. Jiang, J. Dickens, M. Kristiansen","doi":"10.1109/PPC.1999.825445","DOIUrl":"https://doi.org/10.1109/PPC.1999.825445","url":null,"abstract":"A coaxial-type virtual cathode oscillator (vircator) was tested in the Pulsed Power Laboratory at Texas Tech University with electron beam parameters of 500 kV, 40 kA, and 30 ns. The major goal of this experiment was to understand the characteristics of the coaxial vircator and the effect of the feedback field on the microwave efficiency. The experimental results have given the output microwave power of ∼ 400 MW, the microwave energy efficiency of ∼ 2 %, the microwave frequency of ∼ 2 GHz, and the microwave mode of TE11 in circular waveguide. By enhancing the field intensity around the vircator using a microwave reflector, the microwave output power was increased to ∼ 900 MW giving microwave energy efficiency of ∼ 5.5 %. This efficiency is calculated as peak microwave power divided by peak beam power, which does not occur at the same time. The instantaneous efficiency, using the beam power at the time of the peak microwave power is 20%.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115631141","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: 15
Ferroelectric plasma cathodes 铁电等离子体阴极
2000 13th International Conference on High-Power Particle Beams Pub Date : 1999-06-27 DOI: 10.1109/PPC.1999.825497
A. Dunaevsky, Y. Krasik, A. Krokhmal, J. Felsteiner
{"title":"Ferroelectric plasma cathodes","authors":"A. Dunaevsky, Y. Krasik, A. Krokhmal, J. Felsteiner","doi":"10.1109/PPC.1999.825497","DOIUrl":"https://doi.org/10.1109/PPC.1999.825497","url":null,"abstract":"We present results of studies of charged particle and light emission from ferroelectric plasma cathodes. Results of lifetime tests of different ferroelectric cathodes are also described. We studied the operation of a planar electron diode with ferroelectric cathodes having emitting areas of 10cm2 and 100cm2 under the application of a high-voltage pulse of 25kV and 300kV, respectively, with a repetition rate ≤5Hz. Data related to the uniformity of the extracted electron beam, the potential distribution, impedance, power, and energy of the diode operating with these cathodes are given as well. We also present data of the vacuum deterioration as a result of cathode operation.","PeriodicalId":101591,"journal":{"name":"2000 13th International Conference on High-Power Particle Beams","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115844364","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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