{"title":"Study for the Efficiency of Combined Electro-Discharge Launcher","authors":"A. Budin, P. Rutberg, A. Savvateev","doi":"10.1109/PPC.2005.300567","DOIUrl":"https://doi.org/10.1109/PPC.2005.300567","url":null,"abstract":"The experiments with combined launcher joined together the preliminary adiabatic compression of working gas by means of powder charge and its subsequent heating by the electric arc are continuing at the IEE RAS. This operation mode provides the high efficiency of launcher and allows to decrease required temperature and pressure of working gas. The results of combine launcher tests experiments are presented in the paper. It was studied the influence of initial experimental conditions on efficiency of acceleration. The main parameters of the experiments were varying in following range: initial pressure-10-15 MPa, pressure before the discharge -150-300 MPa, initial particle density (1.5- 3.3)times1022 cm-3, maximum pulse pressure - up to 500 MPa, discharge current -300-700 kA, current rise rate dI/dt ~1010 A/s. It was defined that best results achieved when gas mass did not exceed the projectile mass. Obtained experimental data permit to build the dependence of acceleration efficiency on initial gas pressure and inputted electric energy. The optimization of working parameters of launcher from the point of view of energy balance was performed. It was shown that consumption of electric energy consists of 30 - 50 % in compare with classic electrodischarge launcher. In this paper the mass-velocity characteristics of combined launcher for the projectile of 1-16 g weight in velocity range 1.5-5.0 km/s are presented. The best ballistic results: velocity of 2.5 km/s for 7.5-g projectile and velocity of 4.9 km/s for 1.5-g projectile.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132798509","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}
L. Soto, C. Pavez, M. Zambra, A. Becks, A. Clausse
{"title":"Speed2 Driven A Gas Embedded Z-Pinch: A Preliminary Approach","authors":"L. Soto, C. Pavez, M. Zambra, A. Becks, A. Clausse","doi":"10.1109/PPC.2005.300532","DOIUrl":"https://doi.org/10.1109/PPC.2005.300532","url":null,"abstract":"A 0-D model for a quasi static Z-pinch with variable line density has been applied to determined the initial conditions to produce a gas embedded Z-pinch to be driven by SPEED2 generator. Initial conditions to produce a gas embedded Z-pinch with enhanced stability by means resistive effects and by finite Larmor radius effects are obtained.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132448514","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}
M. Joler, C. Christodoulou, E. Schamiloglu, J. Gaudet
{"title":"A Graded-Conductivity Dielectric for Mitigation of Breakdown in a Pulse-Forming Line","authors":"M. Joler, C. Christodoulou, E. Schamiloglu, J. Gaudet","doi":"10.1109/PPC.2005.300577","DOIUrl":"https://doi.org/10.1109/PPC.2005.300577","url":null,"abstract":"This paper reports our findings on the computational study of a multi-layer dielectric used in a parallel-plate Blumlein pulse-forming line. This technique is explored with an aim of lowering the electric field inside the line and thus reducing the probability of breakdown. Using stepped transition of conductivity, we explore what distributions and values of conductivity are beneficial for this goal yet without degrading the overall performance of the line.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"44 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132694293","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}
K. Nielsen, J. Barraza, M. Kang, F. Bieniosek, K. Chow, W. Fawley, E. Henestroza, L. Reginato, W. Waldron, B. Prichard, R. Briggs, T. Genoni, T. Hughes
{"title":"Upgrades to the Darht Second Axis Induction Cells","authors":"K. Nielsen, J. Barraza, M. Kang, F. Bieniosek, K. Chow, W. Fawley, E. Henestroza, L. Reginato, W. Waldron, B. Prichard, R. Briggs, T. Genoni, T. Hughes","doi":"10.1109/PAC.2007.4441258","DOIUrl":"https://doi.org/10.1109/PAC.2007.4441258","url":null,"abstract":"The Dual-Axis Radiographic Hydrodynamics Test (DARHT) facility will employ two perpendicular electron Linear Induction Accelerators to produce intense, bremsstrahlung x-ray pulses for flash radiography. The second axis, DARHT II [1], features a 3-MeV, 2-kA injector and a 15-MeV, 1.6-microsecond accelerator consisting of 74 induction cells and drivers. Major induction cell components include high flux swing magnetic material (Metglas 2605 SC) and a Mycalextrade insulator. The cell drivers are pulse forming networks (PFNs). The DARHT II accelerator cells have undergone a series of test and modeling efforts to fully understand their operational parameters. These R&D efforts have identified problems in the original cell design and means to upgrade the design, performance and reliability of the linear induction cells. Physical changes in the cell oil region, the cell vacuum region, and the cell drivers, together with different operational and maintenance procedures, have been implemented in the prototype units resulting in greatly enhanced cell performance and reliability. A series of prototype acceptance tests have demonstrated that the required cell reliability and lifetime is exceeded at the increased performance levels. Shortcomings of the original design are summarized and improvements to the design, their resultant enhancement in performance, and various test results are discussed.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128911208","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}
{"title":"Development of an Ultracapacitor-Based Intermediate Energy Storage System","authors":"J. Locker, T. Wolfe","doi":"10.1109/PPC.2005.300633","DOIUrl":"https://doi.org/10.1109/PPC.2005.300633","url":null,"abstract":"In recent years, a number of military applications intended to run from automotive power systems have been developed. Such applications can require pulsed power of several kilowatts at a voltage level of several kilovolts, characteristics that make it impossible to run from such a source. In these applications, an energy storage system can be used to reduce the peak power demand from the automotive batteries and to boost the working voltage to kilovolt levels. The ultracapacitor intermediate energy storage system (UCIS) has been designed to provide an interface between a 24 V, 600 A battery and a 10 kV, 25 kJ capacitor bank. During each of three cycles, the UCIS charges the capacitor bank to 10 kV in two seconds, at which time the load discharges the capacitor bank. This paper includes the development of the UCIS, including modeling results, and system design.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131315789","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}
{"title":"Reliability and Lifetime Testing of the Darht Second Axis Induction Cells","authors":"W. Waldron, K. Nielsen, P. Spence","doi":"10.1109/PPC.2005.300487","DOIUrl":"https://doi.org/10.1109/PPC.2005.300487","url":null,"abstract":"The Dual-Axis Radiographic Hydrodynamics Test (DARHT) facility will employ two perpendicular electron linear induction accelerators to produce intense, bremsstrahlung X-ray pulses for flash radiography. The second axis, DARHT II, features a 3 MeV injector and a 15 MeV, 2 kA, 1.5 mus accelerator consisting of 74 induction cells and drivers. High reliability and lifetime of the induction cells are major requirements because of the cost of execution of hydro tests and because the time and effort to remove and refurbish a failed cell is considerable. Research and development efforts have identified problems in the original cell design and means to upgrade the design, performance, and reliability of the linear induction cells. Physical changes in the cell oil region, the cell vacuum region, and the cell drivers, together with different operational and maintenance procedures, have been implemented in six prototype units. This paper addresses the acceptance criteria and acceptance tests applied to the prototype accelerator cells. These tests validate the upgraded cell design and demonstrate that it meets the essential electrical and reliability requirements prior to committing to refurbishment of the full ensemble of DARHT II cells. The prototype acceptance test results are presented and discussed in terms of the confidence level in which the required cell lifetime and reliability are met by the upgraded design and modified operation and maintenance procedures.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115812264","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}
R. Malone, D. Esquibel, B. Frogget, G. Lare, J. Becker, S. Clarke, P. Goodwin, Q. McCulloch, G. Rodriguez
{"title":"Atlas Line-Imaging ORVIS Diagnostic","authors":"R. Malone, D. Esquibel, B. Frogget, G. Lare, J. Becker, S. Clarke, P. Goodwin, Q. McCulloch, G. Rodriguez","doi":"10.1109/PPC.2005.300646","DOIUrl":"https://doi.org/10.1109/PPC.2005.300646","url":null,"abstract":"Many pulsed-power facilities used for high energy density experiments require diagnostics that can measure the velocity histories of shocked materials. The Atlas pulsed-power Z-pinch machine (located at the Nevada Test Site) is a 23-megajoule capacitor bank capable of delivering 28 mega-amperes in an approximately 5 microsecond rise time pulse into a cylindrical imploding liner. Experimental data are needed for the hydro-modeling of dynamic friction. For this set of experiments, shocks in two adjacent materials will produce differential shear velocities. An optically recording velocity interferometer system (ORVIS) has been designed to measure the differential velocity from the inner surface of a load after shock breakout. The moving target surface located inside an imploding load is illuminated with an f/10 laser pulse at 532 nm, focused down to a 12-mm long line. An optical relay collects light from the middle 8-mm of this line at f/15. Relay lenses pass collimated light through a two-arm interferometer, in the same fashion as VISAR (velocity interferometer system for any reflector). Different thicknesses of e acutetalons in one arm allow recording of different velocity ranges. After the interferometer, a dove prism rotates the line image into the slit of the recording streak camera. Alignment techniques are discussed and test calibration data from laser-driven mini-flyer plates are presented.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124288642","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}
V. Selemir, V. A. Demidov, V. Yermolovich, G. M. Spirov, P. B. Repin, I. V. Pikulin, A. Volkov, A. Orlov, A. S. Boriskin, O. Tatsenko, A. N. Moiseenko, S. Kazakov, V. T. Selyavsky, E. V. Shapovalov, B. P. Giterman, Y. Vlasov, P. S. Dydykin, E. A. Ryaslov, D. V. Kotelnikov, P. Duday, S. Gaĭdash
{"title":"Experiments with Multi-Wire Liners, Powered from Helical Magneto-Cumulative Generators","authors":"V. Selemir, V. A. Demidov, V. Yermolovich, G. M. Spirov, P. B. Repin, I. V. Pikulin, A. Volkov, A. Orlov, A. S. Boriskin, O. Tatsenko, A. N. Moiseenko, S. Kazakov, V. T. Selyavsky, E. V. Shapovalov, B. P. Giterman, Y. Vlasov, P. S. Dydykin, E. A. Ryaslov, D. V. Kotelnikov, P. Duday, S. Gaĭdash","doi":"10.1109/PPC.2005.300602","DOIUrl":"https://doi.org/10.1109/PPC.2005.300602","url":null,"abstract":"Experimental results on multi-wire liners powering from helical magneto-cumulative generators MCG-100 and MCG-200, equipped by explosive current opening switches, are presented. A current in a liner was 4 MA at a current rise time of 0.3.. .0.4 mus. A maximum yield of a soft X-ray radiation was more than 100 kJ at a temperature of a plasma pinch of 55 eV.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114955300","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}
B. Frogget, D. Esquibel, C.S. Jeffs, G. Lare, R. Malone, J. Sutton, G. Gomez, K. E. Theuer, C. Y. Tom, B. Anderson, D. Oró, J. Studebaker, D. Westley
{"title":"Atlas Axial Radiography","authors":"B. Frogget, D. Esquibel, C.S. Jeffs, G. Lare, R. Malone, J. Sutton, G. Gomez, K. E. Theuer, C. Y. Tom, B. Anderson, D. Oró, J. Studebaker, D. Westley","doi":"10.1109/PPC.2005.300647","DOIUrl":"https://doi.org/10.1109/PPC.2005.300647","url":null,"abstract":"The Atlas pulsed-power machine [1] is a 23-megajoule capacitor bank that delivers 28 mega-amperes in a 5 microsecond rise-time pulse into a cylindrical imploding liner, which often contains a target. It is used to study the hydrodynamic behavior of various materials under well- controlled high-energy conditions. X-ray imaging or radiography is used to infer trajectories and velocities of the Shockwave and the material interfaces in the target. The axial radiography diagnostic records four high-speed flash x-ray snapshots through the target axis during an experiment. These images provide important benchmarks for various hydrodynamic codes currently used to predict the behavior of shocked materials. Four Marx-driven x-ray diode sources [2], designed by Los Alamos National Laboratory (LANL) and fabricated by Bechtel Nevada, are used. Each source has a pulse duration of 20 nanoseconds full-width half-maximum (FWHM) that thereby freezes the motion of the target [3]. The x-ray images are converted into blue visible light by a scintillator. Two 8-inch-diameter doublet lenses relay this image 6 meters away into a microchannel plate image- intensified framing camera, contained in a screen box. The machine energy destroys the scintillator and sometimes the first relay doublet. The optical relay is realigned for each experiment. Calibration images are stored for each shot. The image data are sent over fiberoptic cables for remote recording.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115084989","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}
{"title":"A Compact, Repetitive, 500kV, 500 J, Marx Generator","authors":"A. Neuber, Y. Chen, J. Dickens, M. Kristiansen","doi":"10.1109/PPC.2005.300570","DOIUrl":"https://doi.org/10.1109/PPC.2005.300570","url":null,"abstract":"The electrical characteristics and design features of a low inductance, compact, 500 kV, 500 J, 10 Hz repetition rate, Marx generator are discussed. While benefiting from the large energy density of mica capacitors, 4 mica capacitors were utilized in parallel per stage, keeping the parasitic inductance per stage low. Including the spark- gap switches, a stage inductance of 55 nH was measured, which translates with 100 nF capacitance per stage to ~18.5 Omega characteristic Marx impedance. Using solely inductors, ~1 mH each, as charging elements instead of resistors enabled charging the Marx within less than 100 ms with little charging losses. The pulse width of the Marx into a matched resistive load is about 200 ns with 50 ns rise-time. Repetitive HPM generation with the Marx directly driving a small Vircator has been verified. The Marx is fitted into a tube with 30 cm diameter and a total length of 0.7 m. We discuss the Marx operation at up to 21 kV charging voltage per stage, with repetition rates of up to 10 Hz in burst mode primarily into resistive loads. A lumped circuit description of the Marx is also given, closely matching the experimental results.","PeriodicalId":200159,"journal":{"name":"2005 IEEE Pulsed Power Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117033293","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}
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
