Pub Date : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530666
B. Egorychev, D. Avdeev, V. V. Avdoshin, A. Buyko, G. I. Volkov, A. M. Glybin, A. V. Ivanovsky, V. A. Ivanov, Y.I. Ivanov, A. I. Krayev, V. B. Kudelkin, A. I. Kuzyayev, I. V. Morozov, S. V. Pak, S. M. Polyushko, A. Petrukhin, A. A. Savosin, A. N. Skobelev, V. Chernyshev, V. I. Shpagin, A. A. Zimenkov, W. Atchison, R. Faehl
This paper studied the process of implosion of the solid quasi-spherical liner driven by the axial magnetic field generated by the pulsed power source. In the experiment the pulsed power source comprising the helical EMG, the current opening switch and the transmission line provided the current pulse of 13 MA with the rise time of ~10 mus in the liner load. Two radiographic images of the quasi-spherical liner collapsing to the central axis under the effect of the magnetic field forces were obtained at different time moments. The velocity of the inner surface of the quasi-spherical liner at the moment of focusing was ~ 9 km/s. The parameters of the pulsed power source and the image of the imploding quasi-spherical liner obtained experimentally agree well with the calculated values.
{"title":"Investigation of Solid Quasi-Spherical Liner Implosion Using Diagnostic Test Stand and Helical Explosive Magnetic Generator as a Pulsed Power Source","authors":"B. Egorychev, D. Avdeev, V. V. Avdoshin, A. Buyko, G. I. Volkov, A. M. Glybin, A. V. Ivanovsky, V. A. Ivanov, Y.I. Ivanov, A. I. Krayev, V. B. Kudelkin, A. I. Kuzyayev, I. V. Morozov, S. V. Pak, S. M. Polyushko, A. Petrukhin, A. A. Savosin, A. N. Skobelev, V. Chernyshev, V. I. Shpagin, A. A. Zimenkov, W. Atchison, R. Faehl","doi":"10.1109/MEGAGUSS.2006.4530666","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530666","url":null,"abstract":"This paper studied the process of implosion of the solid quasi-spherical liner driven by the axial magnetic field generated by the pulsed power source. In the experiment the pulsed power source comprising the helical EMG, the current opening switch and the transmission line provided the current pulse of 13 MA with the rise time of ~10 mus in the liner load. Two radiographic images of the quasi-spherical liner collapsing to the central axis under the effect of the magnetic field forces were obtained at different time moments. The velocity of the inner surface of the quasi-spherical liner at the moment of focusing was ~ 9 km/s. The parameters of the pulsed power source and the image of the imploding quasi-spherical liner obtained experimentally agree well with the calculated values.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122477969","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530716
S. Balashov, P. Duday, B. Egorychev, A. M. Glybin, Y. Gorbachev, V. A. Ivanov, A. V. Ivanovsky, N. Ilyushkina, G. V. Karpov, V. Kolomyitsev, A. I. Krayev, V. B. Kudel’kin, A. I. Kuzyayev, I. V. Morozov, S. S. Nadezhin, S. V. Pak, A. Petrukhin, Yu.V. Savtsova, N. Sitnikova, A. N. Skobelev, O. A. Tyupanova, V. A. Vasyukov, G. I. Volkov, R.R. Zubayerova, B. Anderson, W. Atchison, A. Kaul, M. Salazar, G. Rodriguez, R. Reinovsky, L. Tabaka, D. Westley
The paper presents the results of application of the explosive magnetic pulsed power source (EMPPS), in the first experiments studying the spallation mechanisms of the solid substances damage under conditions of converging axisymmetric geometry of loading of samples by the impact of the cylindrical liner driven to a velocity of 0,2-1 km/s.
{"title":"Experimental Test Bench on the Basis of Helical EMG to Study Spallation Mechanisms in Cylindrical Geometry","authors":"S. Balashov, P. Duday, B. Egorychev, A. M. Glybin, Y. Gorbachev, V. A. Ivanov, A. V. Ivanovsky, N. Ilyushkina, G. V. Karpov, V. Kolomyitsev, A. I. Krayev, V. B. Kudel’kin, A. I. Kuzyayev, I. V. Morozov, S. S. Nadezhin, S. V. Pak, A. Petrukhin, Yu.V. Savtsova, N. Sitnikova, A. N. Skobelev, O. A. Tyupanova, V. A. Vasyukov, G. I. Volkov, R.R. Zubayerova, B. Anderson, W. Atchison, A. Kaul, M. Salazar, G. Rodriguez, R. Reinovsky, L. Tabaka, D. Westley","doi":"10.1109/MEGAGUSS.2006.4530716","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530716","url":null,"abstract":"The paper presents the results of application of the explosive magnetic pulsed power source (EMPPS), in the first experiments studying the spallation mechanisms of the solid substances damage under conditions of converging axisymmetric geometry of loading of samples by the impact of the cylindrical liner driven to a velocity of 0,2-1 km/s.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128884305","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530668
David B. Holtkamp
Optical velocimetry has been an important experimental diagnostic for many experiments. Recent improvements to heterodyne techniques have resulted in compact, inexpensive and high performance velocimetry measurement systems. We report on developments and improvements in this area and illustrate the performance of Photon Doppler Velocimetry (PDV) by showing several experimental examples.
{"title":"Survey of Optical Velocimetry Experiments - Applications of PDV, A Heterodyne Velocimeter","authors":"David B. Holtkamp","doi":"10.1109/MEGAGUSS.2006.4530668","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530668","url":null,"abstract":"Optical velocimetry has been an important experimental diagnostic for many experiments. Recent improvements to heterodyne techniques have resulted in compact, inexpensive and high performance velocimetry measurement systems. We report on developments and improvements in this area and illustrate the performance of Photon Doppler Velocimetry (PDV) by showing several experimental examples.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131125185","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530674
S. Fuelling, T. Awe, B. Bauer, T. Goodrich, V. Makhin, V. Ivanov, R. Presura, R. Siemon, R. Reinovsky, P. Turchi, J. Degnan, E. Ruden
Load hardware and diagnostics have been developed to study metal vapor and plasma formed from aluminum surfaces by pulsed MG fields on Zebra. Radiation MHD modeling indicates plasma formation should occur between 3-5 MG, but such modeling depends on assumed material properties, which are a topic of ongoing research. The experiment is designed to learn about this interesting threshold for plasma formation. A current of 1 MA is pulsed along a stationary, central wire, to generate magnetic fields of 3-5 MG. The goal is to observe and diagnose the formation of metal vapor and plasma in the vicinity of the wire. The simple geometry enables easy access by diagnostics, which include magnetic sensors, filtered photodiode measurements, optical imaging, and laser schlieren, shadowgraphy, interferomerry and Faraday rotation. From these measurements the magnetic field, the density and temperature of the surface metal plasma, the radiation field, and the growth of instabilities will be inferred. Predictions of experimental data will be calculated from numerical simulations and compared with experimental results. The diagnostics are time resolved, so as to examine individually the distinct phases of compression, plasma formation, radiation-magnetohydrodynamic evolution, and instability. Diagnostics have being developed using a small HV pulser.
{"title":"Development of an Experiment to Study Plasma Formation by Megagauss Fields","authors":"S. Fuelling, T. Awe, B. Bauer, T. Goodrich, V. Makhin, V. Ivanov, R. Presura, R. Siemon, R. Reinovsky, P. Turchi, J. Degnan, E. Ruden","doi":"10.1109/MEGAGUSS.2006.4530674","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530674","url":null,"abstract":"Load hardware and diagnostics have been developed to study metal vapor and plasma formed from aluminum surfaces by pulsed MG fields on Zebra. Radiation MHD modeling indicates plasma formation should occur between 3-5 MG, but such modeling depends on assumed material properties, which are a topic of ongoing research. The experiment is designed to learn about this interesting threshold for plasma formation. A current of 1 MA is pulsed along a stationary, central wire, to generate magnetic fields of 3-5 MG. The goal is to observe and diagnose the formation of metal vapor and plasma in the vicinity of the wire. The simple geometry enables easy access by diagnostics, which include magnetic sensors, filtered photodiode measurements, optical imaging, and laser schlieren, shadowgraphy, interferomerry and Faraday rotation. From these measurements the magnetic field, the density and temperature of the surface metal plasma, the radiation field, and the growth of instabilities will be inferred. Predictions of experimental data will be calculated from numerical simulations and compared with experimental results. The diagnostics are time resolved, so as to examine individually the distinct phases of compression, plasma formation, radiation-magnetohydrodynamic evolution, and instability. Diagnostics have being developed using a small HV pulser.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125452390","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530672
R. Siemon, B. Bauer, T. Awe, M. Angelova, S. Fuelling, T. Goodrich, I. Lindemuth, V. Makhin, V. Ivanov, R. Presura, W. Atchison, R. Faehl, R. Reinovsky, D. Scudder, P. Turchi, J. Degnan, E. Ruden, M. Frese, S. Garanin, V. Mokhov
Experiments suitable for a variety of pulsed power facilities are being developed to study plasma formation and stability on the surface of typical liner materials in the megagauss (MG) regime. Understanding the plasma properties near the surface is likely to be critical for the design of Magnetized Target Fusion experiments, where the plasma density in the region near the wall can play an important role in setting the transport from hot fuel to the cold boundary. From the perspective of diagnostic access and simplicity, the surface of a stationary conductor with large enough current to generate MG surface field offers advantages compared with studying the surface of a moving liner. This paper reports on recent experiments at UNR that have generated magnetic fields in the range of about 0.2 to 3 MG, which confirm the viability of future experiments planned at Atlas and/or Shiva Star. Diagnostics reported here involve electrical measurements, streak camera photography, and surface luminosity. Additional diagnostic measurements and numerical modeling will be reported in the future.
{"title":"The Challenge of Wall-Plasma Interaction with Pulsed MG Fields Parallel to the Wall","authors":"R. Siemon, B. Bauer, T. Awe, M. Angelova, S. Fuelling, T. Goodrich, I. Lindemuth, V. Makhin, V. Ivanov, R. Presura, W. Atchison, R. Faehl, R. Reinovsky, D. Scudder, P. Turchi, J. Degnan, E. Ruden, M. Frese, S. Garanin, V. Mokhov","doi":"10.1109/MEGAGUSS.2006.4530672","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530672","url":null,"abstract":"Experiments suitable for a variety of pulsed power facilities are being developed to study plasma formation and stability on the surface of typical liner materials in the megagauss (MG) regime. Understanding the plasma properties near the surface is likely to be critical for the design of Magnetized Target Fusion experiments, where the plasma density in the region near the wall can play an important role in setting the transport from hot fuel to the cold boundary. From the perspective of diagnostic access and simplicity, the surface of a stationary conductor with large enough current to generate MG surface field offers advantages compared with studying the surface of a moving liner. This paper reports on recent experiments at UNR that have generated magnetic fields in the range of about 0.2 to 3 MG, which confirm the viability of future experiments planned at Atlas and/or Shiva Star. Diagnostics reported here involve electrical measurements, streak camera photography, and surface luminosity. Additional diagnostic measurements and numerical modeling will be reported in the future.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121456400","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530720
A. Bykov, N. I. Egorov, Y. Kuropatkin, Nikolay B. Lukianov, V. D. Mironenko, V. Pavlov
This paper presents a radiography technique applied for studying equation of state for condensed hydrogen isotopes, compressed up to megabar pressure by MC-1 generator magnetic field. Calibration of the radiography technique is described. The paper provides computation and experimental radiographs of devices with condensed hydrogen isotopes at pressure of several megabar.
{"title":"Use of Radiography to Study EOS of Condensed Hydrogen Isotopes Within Megabar Pressure Range","authors":"A. Bykov, N. I. Egorov, Y. Kuropatkin, Nikolay B. Lukianov, V. D. Mironenko, V. Pavlov","doi":"10.1109/MEGAGUSS.2006.4530720","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530720","url":null,"abstract":"This paper presents a radiography technique applied for studying equation of state for condensed hydrogen isotopes, compressed up to megabar pressure by MC-1 generator magnetic field. Calibration of the radiography technique is described. The paper provides computation and experimental radiographs of devices with condensed hydrogen isotopes at pressure of several megabar.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117102275","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530717
P. Duday, A. M. Glybin, V. A. Ivanov, I. Izutov, G. V. Karpov, A. I. Kuzyayev, I. V. Morozov, S. V. Pak, A. Petrukhin, A. N. Skobelev, G. I. Volkov
The design and the results of testing of an explosive device forming a current pulse of quasi-trapezoidal shape with the given amplitude and duration in the liner load are presented. A need for such devices was caused by a necessity to compare the experimental data obtained on the gas guns with the results of the experiments with a magnetic drive of the liners under the effect of current flowing through the liner. The results of the experiments in which the formed current pulse in the driven liner had the amplitude of 5 MA, the base duration of 10 ¿s, and the duration of the leading and trailing edges of 2 ¿s are presented.
{"title":"Quasi-Trapezoidal Shape Current Pulse Former Experimental Series ≪≪R-Damage≫≫","authors":"P. Duday, A. M. Glybin, V. A. Ivanov, I. Izutov, G. V. Karpov, A. I. Kuzyayev, I. V. Morozov, S. V. Pak, A. Petrukhin, A. N. Skobelev, G. I. Volkov","doi":"10.1109/MEGAGUSS.2006.4530717","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530717","url":null,"abstract":"The design and the results of testing of an explosive device forming a current pulse of quasi-trapezoidal shape with the given amplitude and duration in the liner load are presented. A need for such devices was caused by a necessity to compare the experimental data obtained on the gas guns with the results of the experiments with a magnetic drive of the liners under the effect of current flowing through the liner. The results of the experiments in which the formed current pulse in the driven liner had the amplitude of 5 MA, the base duration of 10 ¿s, and the duration of the leading and trailing edges of 2 ¿s are presented.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115419030","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530721
A. Bykov, N. I. Egorov, G. V. Boriskov, M. I. Dolotenko, Y. Kuropatkin, N. Lukyanov, V. D. Mironenko, S. Belov, V. G. Belyashkin, M. Lomonosov
The paper describes a device for isentropic compression of frozen gases by pressure of the ultra-high magnetic field generated by the cascade magnetocumulative generator MC-1 (MC-1 EMG). The paper provides test data on isentropic compression of solid hydrogen up to ∼ 3 Mbar. Brief description of a technique for the test data analysis is provided as well as the comparison between this data and the computation. The interest to a hydrogen equation of state within the megabar pressure range is caused by wide hydrogen spread in the universe and its presence in stars and giant planets. Also many applied problems as well as metal hydrogen manufacture can be solved by solving the problem of thermonuclear fusion. Though hydrogen has a primitive single-electron structure that in principle allows direct calculations of high-density states to be performed, the difficulties of the correct consideration for strong interparticle interaction result in construction of differing theoretical models. In these conditions it becomes important to get experimental data on hydrogen compression within the wide range of parameters. The hydrogen “cool” equation of state within the megabar pressure range is possible only with the help of anvil static technique and isentropic compression technique using the ultra-high magnetic field that has been developed at our institute. The goal of this work is plotting a “cool” hydrogen equation of state within the pressure range 1 – 4 Mbar, when thermal pressure component is negligibly small as compared to an elastic one, and full pressure in the substance practically matches the elastic pressure. This goal can be reached using the technique of condensed hydrogen isentropic compression by ultra-high magnetic filed generated by MC-1 generator. A principal schematic of the device is provided in Fig. 1.
{"title":"Isentropic Compression of Condensed Hydrogen Up to Megabar Pressure","authors":"A. Bykov, N. I. Egorov, G. V. Boriskov, M. I. Dolotenko, Y. Kuropatkin, N. Lukyanov, V. D. Mironenko, S. Belov, V. G. Belyashkin, M. Lomonosov","doi":"10.1109/MEGAGUSS.2006.4530721","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530721","url":null,"abstract":"The paper describes a device for isentropic compression of frozen gases by pressure of the ultra-high magnetic field generated by the cascade magnetocumulative generator MC-1 (MC-1 EMG). The paper provides test data on isentropic compression of solid hydrogen up to ∼ 3 Mbar. Brief description of a technique for the test data analysis is provided as well as the comparison between this data and the computation. The interest to a hydrogen equation of state within the megabar pressure range is caused by wide hydrogen spread in the universe and its presence in stars and giant planets. Also many applied problems as well as metal hydrogen manufacture can be solved by solving the problem of thermonuclear fusion. Though hydrogen has a primitive single-electron structure that in principle allows direct calculations of high-density states to be performed, the difficulties of the correct consideration for strong interparticle interaction result in construction of differing theoretical models. In these conditions it becomes important to get experimental data on hydrogen compression within the wide range of parameters. The hydrogen “cool” equation of state within the megabar pressure range is possible only with the help of anvil static technique and isentropic compression technique using the ultra-high magnetic field that has been developed at our institute. The goal of this work is plotting a “cool” hydrogen equation of state within the pressure range 1 – 4 Mbar, when thermal pressure component is negligibly small as compared to an elastic one, and full pressure in the substance practically matches the elastic pressure. This goal can be reached using the technique of condensed hydrogen isentropic compression by ultra-high magnetic filed generated by MC-1 generator. A principal schematic of the device is provided in Fig. 1.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125360879","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530707
I. McNab, C. J. Heyne, M. Cilli
In recent years, the technology of electromagnetic launchers has progressed to the level where potential applications are being seriously explored. Examples include direct¿ and indirect-fire guns for military and even launch to space. Although large capacitor banks (up to 32 MJ) have traditionally been used to supply pulsed power for electromagnetic launcher research laboratory installations, it seems unlikely that these can be miniaturized for tactical field use. The US Army has therefore invested in the development of pulsed alternators capable of providing the required megampere, millisecond pulses. Under contract to the US Army, Curtiss-Wright is presently developing a pair of pulsed alternators for such an application. In this paper, an overview of this development is provided so that the technology can be considered by other pulsed power users in situations where a compact high-energy, high-current source is required.
{"title":"Megampere Pulsed Alternators for Large EM Launchers","authors":"I. McNab, C. J. Heyne, M. Cilli","doi":"10.1109/MEGAGUSS.2006.4530707","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530707","url":null,"abstract":"In recent years, the technology of electromagnetic launchers has progressed to the level where potential applications are being seriously explored. Examples include direct¿ and indirect-fire guns for military and even launch to space. Although large capacitor banks (up to 32 MJ) have traditionally been used to supply pulsed power for electromagnetic launcher research laboratory installations, it seems unlikely that these can be miniaturized for tactical field use. The US Army has therefore invested in the development of pulsed alternators capable of providing the required megampere, millisecond pulses. Under contract to the US Army, Curtiss-Wright is presently developing a pair of pulsed alternators for such an application. In this paper, an overview of this development is provided so that the technology can be considered by other pulsed power users in situations where a compact high-energy, high-current source is required.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126719617","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 : 2006-11-01DOI: 10.1109/MEGAGUSS.2006.4530702
D. Belt, J. Mankowski, A. Neuber, J. Dickens, M. Kristiansen
Helical flux compression generators coupled with an inductive energy storage system have shown promising results as a driving source for High Power Microwave (HPM) loads. The output performance of the inductive energy storage system is contingent upon the opening switch scheme, usually an electro-explosive fuse. Our previous work involving fuse parameter characterization has established a baseline for potential fuse performance. By applying this fuse characterization model to an HFCG powered system, a non-optimized fuse has produced 60 kV into an HPM equivalent load with an HFCG output of 15 kA into a 3 muH inductor. Utilization of a non-explosive HFCG test-bed has produced 36 kV into an HPM equivalent load with an output of 15 kA into a 1.3 muH inductor. The use of a non-explosive HFCG test bed will allow the verification of scalability of the fuse parameter model and also allow testing of exotic fuse materials. Prior analysis of fuse parameters has been accomplished with various materials including Silver (Au), Copper (Cu), and Aluminum (Al), but particular interest resides in the use of Gold (Ag) fuse material. We will discuss the a-priori calculated baseline fuse design and compare the experimental results of the gold wire material with the silver wire material baseline design. With the results presented, an accurate Pspice model applicable to our 45 kA HFCG systems will be available and allow the development of accurate modeling for higher current systems.
螺旋磁通压缩发生器与感应储能系统耦合作为高功率微波(HPM)负载的驱动源已显示出良好的效果。感应储能系统的输出性能取决于开路开关方案，通常是电爆保险丝。我们以前的工作涉及熔断器参数表征已经建立了潜在熔断器性能的基线。通过将该熔断器表征模型应用于HFCG供电系统，未经优化的熔断器已将60 kV产生为HPM等效负载，HFCG输出为15 kA，进入3 muH电感。利用非爆炸性HFCG试验台，在1.3 muH电感器中产生了输出为15ka的36kv HPM等效负载。使用非爆炸性HFCG试验台将允许验证保险丝参数模型的可扩展性，也允许测试外来保险丝材料。先前对熔断器参数的分析已经用各种材料完成，包括银(Au)、铜(Cu)和铝(Al)，但特别感兴趣的是金(Ag)熔断器材料的使用。我们将讨论先验计算的基线熔断器设计，并将金丝材料与银丝材料基线设计的实验结果进行比较。根据所提出的结果，一个适用于我们的45 kA HFCG系统的精确Pspice模型将可用，并允许开发更高电流系统的精确建模。
{"title":"Electro-Explosive Switches for Helical Flux Compression Generators","authors":"D. Belt, J. Mankowski, A. Neuber, J. Dickens, M. Kristiansen","doi":"10.1109/MEGAGUSS.2006.4530702","DOIUrl":"https://doi.org/10.1109/MEGAGUSS.2006.4530702","url":null,"abstract":"Helical flux compression generators coupled with an inductive energy storage system have shown promising results as a driving source for High Power Microwave (HPM) loads. The output performance of the inductive energy storage system is contingent upon the opening switch scheme, usually an electro-explosive fuse. Our previous work involving fuse parameter characterization has established a baseline for potential fuse performance. By applying this fuse characterization model to an HFCG powered system, a non-optimized fuse has produced 60 kV into an HPM equivalent load with an HFCG output of 15 kA into a 3 muH inductor. Utilization of a non-explosive HFCG test-bed has produced 36 kV into an HPM equivalent load with an output of 15 kA into a 1.3 muH inductor. The use of a non-explosive HFCG test bed will allow the verification of scalability of the fuse parameter model and also allow testing of exotic fuse materials. Prior analysis of fuse parameters has been accomplished with various materials including Silver (Au), Copper (Cu), and Aluminum (Al), but particular interest resides in the use of Gold (Ag) fuse material. We will discuss the a-priori calculated baseline fuse design and compare the experimental results of the gold wire material with the silver wire material baseline design. With the results presented, an accurate Pspice model applicable to our 45 kA HFCG systems will be available and allow the development of accurate modeling for higher current systems.","PeriodicalId":338246,"journal":{"name":"2006 IEEE International Conference on Megagauss Magnetic Field Generation and Related Topics","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129179039","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：