2011 IEEE Pulsed Power Conference最新文献_第10页

Temperature dependence of ferrimagnetic based nonlinear transmission line 铁磁非线性传输线的温度依赖性

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191411

J.-W. Braggy, J. Dickens, A. Neuber

{"title":"Temperature dependence of ferrimagnetic based nonlinear transmission line","authors":"J.-W. Braggy, J. Dickens, A. Neuber","doi":"10.1109/PPC.2011.6191411","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191411","url":null,"abstract":"Ferrite loaded nonlinear transmission lines (NLTLs) are able to act as high power microwave sources, utilizing the nonlinearities present in ferrimagnetic materials and the excitation of damped gyromagnetic precession at high incident power levels. Ferrimagnetic properties depend greatly on operating temperatures; therefore, there exists a need to know the ideal temperature at which to operate ferrite loaded NLTLs. Ferrites are chilled or heated to a certain temperature for a time suitable to allow internal ferrite temperature uniformity. Experimental temperatures ranged from approximately −20 °C up to 150 °C, which is slightly above the Curie temperature of the loaded ferrites. This temperature range allows observation of precession dependence on temperature while maintaining ferrimagnetic properties and a single look at the behavior outside the ferrimagnetic regime. Above the Curie temperature the loaded ferrites become paramagnetic and lose ferrimagnetic properties. The design, testing, and results are detailed for an NLTL measuring 0.3 m length and ferrite inner and outer diameters of 3 mm and 6 mm respectively. Figures comparing output waveforms at different temperatures, output power versus temperature, and output frequency versus temperature are shown.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121225696","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

A high-power, high-energy pulsed-power generator for high-impedance loads 一种用于高阻抗负载的大功率高能脉冲发电机

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191493

M. Parker, B. Novac, I. Smith, P. Senior, G. Louverdis

引用次数: 0

Electro-optic Kerr effect measurements of intense pulsed electric fields in water 水中强脉冲电场的电光克尔效应测量

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191439

F. Banakhr, B. Novac, I. Smith, L. Pécastaing, R. Ruscassié, A. D. de Ferron, P. Pignolet

引用次数: 4

Transient performance of battery/fuel cell-based APU on aircraft electric power systems with nonlinear loading 基于电池/燃料电池的飞机电力系统APU在非线性负载下的瞬态性能

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191669

H. El-kishky, H. Ibrahimi, M. Abu Dakka, A. Eid, M. Abdel-Akher

引用次数: 12

Study and diagnosis of the power transformer bushing insulation system 电力变压器套管绝缘系统的研究与诊断

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191566

A. Mehta, R.N. Sharma, S. Chauhan, S. Agnihotri

引用次数: 10

SiC super GTO thyristor technology development: Present status and future perspective SiC超级GTO晶闸管技术发展现状与展望

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191677

Q. Zhanga, A. Agarwal, C. Capell, L. Cheng, M. O'loughlin, A. Burk, J. Palmour, V. Temple, A. Ogunniyi, H. O’Brien, C. Scozzie

引用次数: 27

Electrical analysis of piezoelectric transformers and associated high-voltage output circuits 压电变压器及相关高压输出电路的电气分析

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191468

J. Vangordon, B. Gall, S. Kovaleski, E. Baxter, B. H. Kim, J. Kwon, G. Dale

引用次数: 3

Investigation of the mechanism of electron current suppression in an ion diode with magnetic self - insulation 磁性自绝缘离子二极管中电子电流抑制机理的研究

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191532

A. Pushkarev, Y. Isakova, V. Guselnikov

{"title":"Investigation of the mechanism of electron current suppression in an ion diode with magnetic self - insulation","authors":"A. Pushkarev, Y. Isakova, V. Guselnikov","doi":"10.1109/PPC.2011.6191532","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191532","url":null,"abstract":"The results of a study of the generation of a pulsed ion beam of gigawatt power formed by a diode with an explosive-emission potential electrode in a mode of magnetic self-insulation are presented. The studies were conducted at the TEMP-4M ion accelerator set in double pulse formation mode: the first pulse was negative (300–500 ns and 100–150 kV) and the second positive (150 ns, 250–300 kV). The ion current density was 20–40 A/cm2; the beam composition was protons and carbon (70%) ions. It was shown that plasma is effectively formed over the entire working surface of the graphite potential electrode. During the ion beam generation a condition of magnetic cutoff of electrons along the entire length of the diode (B/Bcr ≥ 4) is fulfilled. Because of the high drift rate the residence time of the electrons and protons in the anode-cathode gap is 3‒5 ns, while for the C+ ions it is more than 8 ns. This denotes low efficiency of magnetic self-insulation in a diode of such a design. At the same time it has been experimentally observed that during the generation of ion current (second pulse) the electronic component of the total current is suppressed by a factor of 1.5–2 for a strip diode with plane and focusing geometry. A new model of the effect of limiting the electron emission explaining the decrease in the electronic component of the total current in a diode with magnetic self-insulation is proposed.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133829928","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

Triggered vacuum switch and air spark gap for pulsed power applications 脉冲功率应用的触发真空开关和空气火花间隙

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191635

X. Duan, M. Liao, J. Zou, Chun Zhao

{"title":"Triggered vacuum switch and air spark gap for pulsed power applications","authors":"X. Duan, M. Liao, J. Zou, Chun Zhao","doi":"10.1109/PPC.2011.6191635","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191635","url":null,"abstract":"The closing switch is the main device to control the power supply of an ElectroMagnetic Launcher (EML) system. Three types of closing switch which included a triggered vacuum switch (TVS) and two air spark gaps (ASGs) named ASG-1, ASG-2 and ASG-3 with different configuration in trigger unit were described for investigating the delay characteristics, high current capacity and erosion characteristics. A LC resonant circuit was set up and connected with the TVS's and ASG's main electrodes. A design circuit for controlling the TVS and ASGs was proposed. The trigger energy of the controller can be adjusted conveniently. By means of changing the trigger energy, the experimental data show that the delay time and jitter time decrease with increasing the trigger energy. The delay time and jitter time decreases magnificently with increasing the voltage in main gap. The improvement in the structure and controller of the TVS and ASG is a good way of decreasing the delay time and jitter time. It shows that TVS-2 has better performance in delay time and jitter time than TVS-1. Generally, ARG-2 and ARG-3 have shorter delay time than TVS-1 and TVS-2, as the initial plasma would be generated much more easily and quickly in the air than that in the vacuum case. ASG has a shorter delay time and lower needed minimum breakdown voltage than TVS. The results show that TVS is a better choice than ARG with insignificant erosion.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"60 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114046754","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

Nanosecond-scale spectroscopy of vacuum ultraviolet emission from pulsed atmospheric discharges 脉冲大气放电真空紫外发射的纳秒尺度光谱学

2011 IEEE Pulsed Power Conference Pub Date : 2011-06-19 DOI: 10.1109/PPC.2011.6191416

G. Laity, A. Neuber, A. Fierro, J. Dickens, L. Hatfield

{"title":"Nanosecond-scale spectroscopy of vacuum ultraviolet emission from pulsed atmospheric discharges","authors":"G. Laity, A. Neuber, A. Fierro, J. Dickens, L. Hatfield","doi":"10.1109/PPC.2011.6191416","DOIUrl":"https://doi.org/10.1109/PPC.2011.6191416","url":null,"abstract":"This paper describes a 2nd-generation system for directly studying the emission of vacuum ultraviolet (VUV) light from pulsed dielectric surface flashover at atmospheric pressure. The role of self-produced VUV emission (i.e. energies greater than 7 eV) on photo-ionization processes during the early nanoseconds of pulsed discharges is virtually unexplored, and yet could be a significant factor in the physics of fast breakdown of directed energy systems (such as MW-class high power microwave devices) in the aerospace community. First generation experiments at Texas Tech University have shown that VUV emission corresponding to nitrogen and oxygen excitation in the energy range 8-10 eV is easily produced, but the use of MgF2 optics inhibited future work with existing hardware due to the transmission cutoff of this dielectric material and chromatic aberration if used as a lensing medium. In an effort to enhance the detection capabilities of our hardware in the wavelength range from 115-135 nm, the current system utilizes a custom designed set of off-axis parabolic MgF2-Aluminium coated mirrors as the primary focusing element. High resolution spectroscopy with the upgraded system resulted in the observation of the nitrogen doublet at 149.5 nm, leading to a better fit for the appropriate line broadening parameters for an approximate 10 eV Boltzmann electronic temperature. Evidence of self-absorption for HI (121.5 nm) provides new insight into the generation of space charge in these plasma structures, which has been investigated quantitatively in both SF6-H2 and N2-H2 mixtures.","PeriodicalId":331835,"journal":{"name":"2011 IEEE Pulsed Power Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122957585","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