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IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium最新文献

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A high performance transmitter for the NEXRAD radar system NEXRAD雷达系统的高性能发射机
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26228
E.M. Ulanowicz, E. H. Hooper
{"title":"A high performance transmitter for the NEXRAD radar system","authors":"E.M. Ulanowicz, E. H. Hooper","doi":"10.1109/MODSYM.1988.26228","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26228","url":null,"abstract":"An S-band radar transmitter developed for the Next Generation Weather Radar (NEXRAD) operates at dual RF pulsewidths of 1.5 and 5.0 mu s and variable PRF (pulse repetition frequency) ranging between 300 and 1300 p.p.s. The transmitter has demonstrated a phase stability of better than 57 dB. The performance is achieved with a klystron amplifier cathode pulsed by an all-solid-state line-type modulator. Special attention is given to modulator pulse regulation, output regulation and inverter timing in the filament supply, and spectral conditioning in the solid-state RF driver. The peak modulator power level of 1.5 MW is capable of producing a peak RF output in excess of 750 kW. The authors describe the transmitter in terms of architecture, design details, and performance planned and achieved. Particular attention is given to the techniques used to ensure stability in the face of variation in pulsewidth and PRF.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"341 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117343164","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
Advances in magnetic pulse compression for copper vapor lasers 铜蒸气激光器磁脉冲压缩研究进展
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26241
I. Smilanski
{"title":"Advances in magnetic pulse compression for copper vapor lasers","authors":"I. Smilanski","doi":"10.1109/MODSYM.1988.26241","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26241","url":null,"abstract":"The effect of copper vapor laser load on a magnetic compressor exciter is discussed. The load produces a back-current which heavily stresses the switch. It is shown that these stresses can be significantly relieved by changing the capacitors in the laser charging circuit.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125282357","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: 1
A Blumlein pulser design for driving a flash soft X-ray source 用于驱动闪光软x射线源的Blumlein脉冲发生器设计
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26263
R. Stemprok, R. Gupta
{"title":"A Blumlein pulser design for driving a flash soft X-ray source","authors":"R. Stemprok, R. Gupta","doi":"10.1109/MODSYM.1988.26263","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26263","url":null,"abstract":"The design of a DC charged Blumlein pulser in a cylindrical configuration capable of delivering 500 J in less than 200 ns at 25 kV to an imploding plasma load of 50 m Omega dynamic impedance in a 5 nH inductance diode is described. The pulser is targeted to drive a short-circuit peak current of 500 kA rising in 100 ns. The design integrates multiple-spark-gap switches with the Blumlein store in order to maximize its performance. The experimental pulser is easy to modify and maintain in an attempt to achieve a billion-shot life expectancy at 100 Hz. Design and computer simulation of a pulser under fabrication are reported.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115322986","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
2.5 MW average-power crossatron switch operation in a square-wave modulator circuit 在方波调制器电路中，2.5 MW平均功率的交叉电子开关操作
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26261
R. Schumacher, R. Watkins, R. Litte, R. Limpaecher
{"title":"2.5 MW average-power crossatron switch operation in a square-wave modulator circuit","authors":"R. Schumacher, R. Watkins, R. Litte, R. Limpaecher","doi":"10.1109/MODSYM.1988.26261","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26261","url":null,"abstract":"The demonstrated average-power-modulating capability of the XTRON-4b crossatron switch has been advanced to 2.5 MW at average current. Tests are described in which the switch was integrated into a simple square-wave, resistive-load modulator circuit consisting of a 10 MW power supply, a capacitor bank, and a water-tank load. The switch operated successfully at 140 A peak current, 32.2 kV open-circuit voltage, and 77.2 A average current with 1.2 ms pulsewidth and 500 Hz pulse repetition frequency (PRF) (60% duty). This advanced performance represents 2.5 MW of high-speed power-modulating capability. At higher voltages, 500 kW was modulated at 50 kV and 1 kHz PRF, and 250 kW was modulated at 75 kV and 100 Hz PRF.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126454643","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
Permeabilities of metallic glasses at high magnetization rates 高磁化率下金属玻璃的磁导率
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26293
C. H. Smith
{"title":"Permeabilities of metallic glasses at high magnetization rates","authors":"C. H. Smith","doi":"10.1109/MODSYM.1988.26293","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26293","url":null,"abstract":"Domain models for dynamic magnetization of metallic glasses are discussed together with their predictions for the behavior of pulse permeability and maximum permeability. The effect of voltage excitation waveshape on losses is calculated for both bar-domain magnetization and saturation-wave magnetization. Metallic glasses of both iron and cobalt-based compositions with induced anisotropy energies between 50 and 90 J/m/sup 3/ have been measured at times-to-saturation between 60 ns and 100 mu s. Measurements are also given of saturated permeabilities to 10 kA/m. The ratio of losses at constant dB/dt excitations to those occurring with 1-cosine excitation is calculated for different models of domain behavior.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"32 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125709914","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: 8
Circuit techniques for a cold-cathode electron beam modulator with compensation for drooping load impedance 负载阻抗下降补偿冷阴极电子束调制器的电路技术
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26280
G. Santamaria
{"title":"Circuit techniques for a cold-cathode electron beam modulator with compensation for drooping load impedance","authors":"G. Santamaria","doi":"10.1109/MODSYM.1988.26280","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26280","url":null,"abstract":"A cold-cathode electron-beam modulator for the pumping of gas lasers presents a drooping load impedance which must be accommodated in the modulator design. A set of performance requirements is described which characterize a typical application. A circuit approach is chosen that uses a Marx generator as part of a type-A PFN (pulse forming network) circuit. The antiresonant sections of the PFN circuit involve inductance values so low as to be physically unrealizable with practical components. A Foster transformation is used to realize a modified form of the prototype network with reasonable inductance values. A simple method for compensating the drooping impedance of the load is described, and a circuit implementation is given. A physical arrangement of the modulator is described. The results of a detailed computer simulation are given, showing that the basic goals are met.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128180535","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
Crossatron switch as thyratron replacement in high repetition rate, high average power modulators 交控开关在高重复率、高平均功率调制器中替代闸流管
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26260
J. Sullivan
{"title":"Crossatron switch as thyratron replacement in high repetition rate, high average power modulators","authors":"J. Sullivan","doi":"10.1109/MODSYM.1988.26260","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26260","url":null,"abstract":"Four prototype crossatron devices were evaluated with respect to their performance and lifetime in high-repetition-rate, high-average-power pulse modulators that had previously been equipped with hydrogen thyratrons. Various grid-drive, keep-alive power levels and triggering schemes were used in the tests. Switch parameters such as trigger time, anode fall time, jitter recovery time, peak di/dt, switch efficiency, and the gas pumping effect of the discharge were observed. One crossatron prototype was also subjected to lifetime tests that accumulated tens of billions of pulses. Lifetime data are compared to those of various models tested similarly. It is concluded that the crossatron can be used as an efficient, low-jitter, high-repetition-rate closing switch for high-average-power modulators. The lifetime of the switch appears to be on a par with several thyratrons of similar rating.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130090052","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
Pulse generators using chemical double layer capacitor technology 脉冲发生器采用化学双层电容器技术
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26294
M. Rose, S. Merryman
{"title":"Pulse generators using chemical double layer capacitor technology","authors":"M. Rose, S. Merryman","doi":"10.1109/MODSYM.1988.26294","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26294","url":null,"abstract":"The authors describe low-voltage pulsers which combine both batteries and chemical double-layer (CDL) capacitors to achieve long-duration (>1 s), high-power pulses which could be suitable for powering a number of devices such as EMLs, solid-state laser arrays and magnetic-field coils. Several laboratory devices are described ranging from Marx circuits to Type-A Guillemin lines. Since CDL capacitors are inherently low-voltage devices with modest equivalent series resistance (ESR), restrictions exist on operating voltages, allowable ESR, pulser impedance and the absolute value of the capacitors. These parameter restrictions are discussed in terms of what can be achieved as a result of research in progress.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132592735","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: 1
Electrical power losses due to acoustic wave generation in repetitive pulsed capacitors 重复脉冲电容器中声波产生造成的电能损耗
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26299
G. Mcduff
{"title":"Electrical power losses due to acoustic wave generation in repetitive pulsed capacitors","authors":"G. Mcduff","doi":"10.1109/MODSYM.1988.26299","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26299","url":null,"abstract":"It is shown that mechanical forces induced by electrical fields are important both to the design of high-repetition-rate modulators and to the life of pulse capacitors. The most important parameter pertaining to modulator design is the electrical-to-acoustic power conversion. Tests were conducted in a 80-90 nS, 1000 p.p.s. discharge circuit at the full rated voltage of the capacitor. The acoustic output for mica and film/oil capacitors is largely dependent on the volume material of the case and the winding technique of the particular device. The main influence on the life of the capacitors is the electric-field-induced force. It is found that if impurities or products of electrochemical breakdown have a dielectric constant greater than that of the bulk material, these compounds will be attracted to the high-field regions of a capacitor.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127853049","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: 7
Integrated thyratron driver for high-rep rate, high-power modulators 集成闸流管驱动高重复率，高功率调制器
IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium Pub Date : 1988-06-20 DOI: 10.1109/MODSYM.1988.26240
P. Creely, S. Ball, R. Hitchcock
{"title":"Integrated thyratron driver for high-rep rate, high-power modulators","authors":"P. Creely, S. Ball, R. Hitchcock","doi":"10.1109/MODSYM.1988.26240","DOIUrl":"https://doi.org/10.1109/MODSYM.1988.26240","url":null,"abstract":"The authors describe the development of a thyratron driver system which generates all of the required support circuitry for a thyratron tube into one compact package. They discuss the electrical and mechanical requirements that were imposed and how these issues were resolved. The physical and electrical characteristics of the finished product and its use in all actual modulator application are described. The wide operating ranges of the power supplies allows the user to choose from a variety of tubes without the need for customizing each driver package. The driver is capable of operating with cathode-referenced or grid-referenced thyratrons in an air or oil-insulated environment.<<ETX>>","PeriodicalId":372718,"journal":{"name":"IEEE Conference Record of the 1988 Eighteenth Power Modulator Symposium","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131275740","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: 1
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