Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference最新文献_第7页

Experimental results of a high power rep-rate velvet cathode 高功率再现率天鹅绒阴极的实验结果

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596786

S. Calico, M. C. Clark, M. Scott

{"title":"Experimental results of a high power rep-rate velvet cathode","authors":"S. Calico, M. C. Clark, M. Scott","doi":"10.1109/PPC.1995.596786","DOIUrl":"https://doi.org/10.1109/PPC.1995.596786","url":null,"abstract":"The primary goal of the Electromagnetic Sources Division of the Advanced Weapons and Survivability Directorate at the Phillips Laboratory is the development of high power microwave (HPM) devices for a variety of Air Force Applications. Recent interest has been in the repetition-rate (rep-rate) operation of traditionally single-shot HPM sources. Integral to this development is an understanding of the operation of velvet cathodes at multi-gigawatt power levels under rep-rate conditions. Velvet has been shown to emit very uniformly at relatively low field levels (<30 kV/cm), but suffers from the problem of outgassing during the beam pulse. This outgassing could cause the diode to short in subsequent pulses or a voltage breakdown in other areas of the microwave tube due to the increased pressure. Initial tests have been performed to determine the feasibility of the application of velvet cathodes for rep-rate operation. These tests were performed on the Phillips Laboratory Rep-Rate Pulser, a 5 /spl Omega/, variable voltage, rep-rate device. This pulser can deliver 150-500 kV, 500 ns pulses to a 5 /spl Omega/ load at a rep-rate of a few Hz depending on the operating voltage. The temporal evolution of the pressure within the tube as a function of voltage was monitored during the tests to determine the maximum rep-rate dictated by the velvet cathode. The results of these experiments are given in this paper.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"53 1","pages":"677-681 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83640170","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: 6

Advances in X-ray simulator technology x射线模拟器技术的进展

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596447

W. J. Summa, R. Gullickson, M. Hebert, J. E. Rowley, J. F. Léon, I. Vitkovitsky

{"title":"Advances in X-ray simulator technology","authors":"W. J. Summa, R. Gullickson, M. Hebert, J. E. Rowley, J. F. Léon, I. Vitkovitsky","doi":"10.1109/PPC.1995.596447","DOIUrl":"https://doi.org/10.1109/PPC.1995.596447","url":null,"abstract":"DNA's future X-ray simulators are based upon inductive energy storage, a technology which offers the promise of more compact and affordable energy storage and delivery for larger systems. DECADE is a prime example of this technology. DECADE will store approximately 10 megajoules and deliver about 2 megajoules to separate bremsstrahlung sources or to a combined plasma radiation source load. Two DECADE prototype modules have already operated, demonstrating that key parameters can be met. The concept of inductive energy storage is illustrated. An opening switch is placed in parallel with the load. Energy is delivered to the load when the switch rapidly increases its resistance (i.e., opens). The most commonly used form is the plasma opening switch (POS) which opens as plasma charge carriers are depleted or move out of the conduction region under the influence of J/spl times/B forces. The scaling of the voltage produced across the switch is also illustrated. It is proportional to the current and inversely proportional to the opening time. Switch performance has been demonstrated with short opening times and lower switch voltages. The state of switch technology is also indicated. The risk of switch performance would be lower for soft X-ray simulators if plasma radiation source loads can operate with longer implosion times.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"37 1","pages":"1-12 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85827602","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: 4

Explosively formed fuse opening switches for multi-megajoule applications 用于多兆焦耳应用的爆炸式熔断器开断开关

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596500

J. Goforth, B. Anderson, D. Bartram, C. Findley, O. Garcia, G. J. Heltne, D. Herrera, T. Herrera, J. King, I. Lindemuth, E. Lopez, S. Marsh, E. C. Martinez, M. Thompson, H. Oona, J. Stokes, D. Torres, L. Veeser, M. Yapuncich, W. D. Zerwekh

{"title":"Explosively formed fuse opening switches for multi-megajoule applications","authors":"J. Goforth, B. Anderson, D. Bartram, C. Findley, O. Garcia, G. J. Heltne, D. Herrera, T. Herrera, J. King, I. Lindemuth, E. Lopez, S. Marsh, E. C. Martinez, M. Thompson, H. Oona, J. Stokes, D. Torres, L. Veeser, M. Yapuncich, W. D. Zerwekh","doi":"10.1109/PPC.1995.596500","DOIUrl":"https://doi.org/10.1109/PPC.1995.596500","url":null,"abstract":"High explosive pulsed power (HEPP) systems are capable of generating very high energies in magnetic fields. Such stored energy is usually developed on time scales of a few tens or hundreds of microseconds. Many applications require shorter pulses and opening switches provide one way to use the large energy available for faster applications. With current flowing in an inductive circuit, introducing resistance produces voltage that can be used to drive current into a load. For an opening switch with a fast rising resistance, the load current rise time is determined by the R/L time constant of the circuit. A significant fraction of the circuit energy must be dissipated in the process, and in applications where very large energies must be dealt with only a few types of switches can be used. Experiments with high explosive driven opening switches have produced a few switches that can carry tens of MA current, and open on the time scale of one or a few /spl mu/s. We have specialized in a type of switch that we call an explosively formed fuse (EFF), and the use of this switch in the is MJ Procyon system is the subject of this paper. Operation of the EFF switch at levels of /spl sim/3 TW for 2 /spl mu/s has become routine, and we describe its characteristics and give data from a number of tests.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"14 1","pages":"321-326 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84332835","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

Operating characteristics of a high-current demountable Cs-Ba tacitron 大电流可拆卸铯钡电子管的工作特性

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596520

G.B. Masten, I.N. Djachiachvili, D. B. Morris, J. Gahl

引用次数: 3

Instabilities in foil implosions and the effect on radiation output 箔内爆的不稳定性及其对辐射输出的影响

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599741

H. Oona, D. Peterson, J. Goforth, M. Yapuncich, C. Findley, E. Lopez, J. Benage, G. Idzorek, J. Cochrane, B. Anderson, J. Shlachter

{"title":"Instabilities in foil implosions and the effect on radiation output","authors":"H. Oona, D. Peterson, J. Goforth, M. Yapuncich, C. Findley, E. Lopez, J. Benage, G. Idzorek, J. Cochrane, B. Anderson, J. Shlachter","doi":"10.1109/PPC.1995.599741","DOIUrl":"https://doi.org/10.1109/PPC.1995.599741","url":null,"abstract":"One of the aims of the Athena program at the Los Alamos National Laboratory is the generation of a high fluence of soft X-rays from the thermalization of a radially imploding foil. In experiments in the Athena program, a large axial current is passed through a cylindrical aluminum foil. Under the action of the Lorentz force, the resulting plasma accelerates toward the axis, thermalizes, and produces a fast soft X-ray pulse with a blackbody temperature up to several hundred electron volts. We present visible light images and X-ray data designed to study the effects of foil mass, current, and initial perturbations on the instability growth during foil implosion. Representative data is presented from several experiments using the Pegasus capacitor bank system and the explosively driven Procyon system. These experiments are labeled Peg 25 and Peg 33 for the Pegasus experiments and PDD1, PDD2 and PRFO for the Procyon experiments. In these experiments, all foils had radii of 5 cm but varied in mass and initial conditions. Experimental data from several shots were compared with each other and to a radiation magnetohydrodynamic (RMHD) computation. The data obtained from these experiments and the analysis has given us understanding of the physical mechanisms involved and insight for future experiments and has lead us to propose methods for minimizing the instability growth and maximizing the radiation output. In particular, we observed that wrinkles and other physical anomalies in the initial shape of foil do not appear to contribute to the growth of the instabilities.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"18 1","pages":"987-992 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88084465","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

The Jupiter program 木星计划

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596461

J. J. Ramirez

引用次数: 5

The design and testing of an extended lifetime, high voltage, low jitter trigatron for repetitive operation 设计和测试了一种延长寿命，高电压，低抖动的重复操作的三控管

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596485

A. J. McPhee, I. Somerville, S. Macgregor

引用次数: 8

PAMIR-3U magnetohydrodynamic generator results PAMIR-3U磁流体动力发电机结果

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599810

D. Price, D. Swallom, V. Goldfarb, J. S. Gibbs, I. Sadovnik, V. Zeigarnik, N. L. Aitov, A. G. Buzlov, I. Dikhter, P. V. Il’ichev, A. D. Iserov, E. Ivanov, A.V. Kulevtsov, I.G. Kuryachii, V. Novikov, V. Okunev, A.N. Revtov, V. Rickman, A. G. Blokh, A. V. Pisakin, P. N. Egorushkin, B. G. Tkachenko, Y. P. Babakov, R.K. Kuzmin, E.B. Sirtsov, A.K. Yanitskii, E. F. Zhegrov, V. A. Parkhomenko, A. Olson, R.E. Anderson, M. Fedun, G. R. Hill

{"title":"PAMIR-3U magnetohydrodynamic generator results","authors":"D. Price, D. Swallom, V. Goldfarb, J. S. Gibbs, I. Sadovnik, V. Zeigarnik, N. L. Aitov, A. G. Buzlov, I. Dikhter, P. V. Il’ichev, A. D. Iserov, E. Ivanov, A.V. Kulevtsov, I.G. Kuryachii, V. Novikov, V. Okunev, A.N. Revtov, V. Rickman, A. G. Blokh, A. V. Pisakin, P. N. Egorushkin, B. G. Tkachenko, Y. P. Babakov, R.K. Kuzmin, E.B. Sirtsov, A.K. Yanitskii, E. F. Zhegrov, V. A. Parkhomenko, A. Olson, R.E. Anderson, M. Fedun, G. R. Hill","doi":"10.1109/PPC.1995.599810","DOIUrl":"https://doi.org/10.1109/PPC.1995.599810","url":null,"abstract":"The Air Force's Phillips Laboratory has acquired a high power magnetohydrodynamic (MHD) generator for possible use with advanced weapons applications. This MHD generator is a PAMIR-3U, a modified Russian-built MHD generator that uses a modified rocket fuel to produce a DC electrical pulse of 100 MJ. The PAMIR-3U generator produces tens of kA at 800 V for an optimized load of (20/spl plusmn/5) m/spl Omega/. A review of the MHD generator design and results of the generator acceptance testing is presented. The PAMIR-3U generator was constructed by the Institute of High Temperatures of the Russian Academy of Sciences (IVTAN) and delivered to the Air Force's Phillips Laboratory under contract with Textron Defense Systems (TDS) of Everett MA.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"16 1","pages":"1383-1388 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78759327","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

Low impedance nanosecond and sub-nanosecond risetime pulse generators for electro-optical switch applications 用于电光开关的低阻抗纳秒和亚纳秒上升时间脉冲发生器

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596808

A. Litton, A. Erickson, P. Bond, A. Kardo-Susoyev, B. O’Meara

{"title":"Low impedance nanosecond and sub-nanosecond risetime pulse generators for electro-optical switch applications","authors":"A. Litton, A. Erickson, P. Bond, A. Kardo-Susoyev, B. O’Meara","doi":"10.1109/PPC.1995.596808","DOIUrl":"https://doi.org/10.1109/PPC.1995.596808","url":null,"abstract":"There is a growing demand in the laser industry for fast risetime, high repetition rate electro-optical switches. The focus of Fast Transitions, Inc. and its partners Megapulse and Moose Hill Enterprises has been to address the unique needs of the E-O switch driver market. The capabilities of the devices and systems described here also extend into other areas such as streak camera drivers, pulsed laser diode drivers, spark gap triggers, microwave tube drivers and many others. The driver systems now being produced are unprecedented in their capabilities in terms of performance, size, cost, life, reliability and efficiency. These drivers are based on a Russian developed solid state device known as the DSRD (drift step recovery diode). This device allows the generation of low output impedance, short, high voltage pulses with very simple circuits. Most simply stated, the DSRD operates as a high voltage opening switch. The driving circuits utilize inductive energy storage at relatively low input voltages and the DSRD allows the transfer of energy from the storage inductance to the load. Its fast switching time and low junction capacitance allow the rise time to be largely determined by the characteristics of the storage inductance and output circuit.","PeriodicalId":11163,"journal":{"name":"Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference","volume":"60 1","pages":"733-738 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1995-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88331343","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

Characterization of a pseudospark switch triggered by a corona-plasma electrode 电晕-等离子体电极触发伪火花开关的特性研究

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596519

Z. Zeng, J. C. Thomaz, G. Bauville, A. Delmas, M. Legentil, F. Bendiab, C. Postel, V. Puech

引用次数: 1