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Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference最新文献

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Pulsed power in Ukraine 乌克兰的脉冲功率
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596449
V. Chemerys, I. Onyshchenko
This report summarizes the broad spectrum of activity in pulsed power technology in Ukraine during the last decade of the twentieth century. The purpose of this report is to acquaint the pulsed power community with the major centers in Ukraine which are conducting pulsed power research and developing applications associated with this technology. The pulsed power research and development of applications are being revamped as Ukraine's economy transitions to a free market economy. Because of current economic conditions, pulsed power development is constrained, especially in the experimental and development areas. Historically, development of pulsed power investigations in Ukraine was driven by the needs of experimental physics and by the new electrotechnology developments, as well as by the pure scientific interest of the researchers. The first application of pulsed power processes was magneto-impulse forming in the early 1960s. Gradually the pulsed power applications spread to other technologies (e.g., metal powder sintering) and to designs of special (pulsed) electromechanical devices. With participation of many institutes and research laboratories, the pulsed power technology is concentrated in centers in three cities.
本报告总结了二十世纪最后十年乌克兰在脉冲功率技术方面的广泛活动。本报告的目的是使脉冲功率界了解乌克兰正在进行脉冲功率研究和开发与这项技术有关的应用的主要中心。随着乌克兰经济向自由市场经济过渡,脉冲电源的研究和应用开发正在得到改进。由于目前的经济条件,脉冲功率的发展受到限制,特别是在实验和开发领域。从历史上看,乌克兰脉冲功率研究的发展是由实验物理学的需要和新的电子技术发展以及研究人员的纯科学兴趣驱动的。脉冲功率过程的第一个应用是在20世纪60年代早期的磁脉冲成形。脉冲功率的应用逐渐扩展到其他技术(例如,金属粉末烧结)和特殊(脉冲)机电设备的设计。在许多研究所和研究实验室的参与下,脉冲功率技术集中在三个城市的中心。
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引用次数: 0
Operating modes for compulsator based electromagnetic launcher systems 基于强制器的电磁发射系统的操作模式
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596477
S. Pratap, J.P. Kajs, W. Walls, W. Weldon, J. Kitzmiller, S. K. Murthy
The compensated pulsed alternator (compulsator) is a versatile power supply capable of interfacing with the electromagnetic launcher in various ways. The method that has been explored at length with several systems is the single phase option. Several variants of this option, some using advanced pulse shaping techniques, have been discussed in prior publications. Besides this basic single pulse method of operating there are several other methods each with its pros and cons. The multi-phase option is discussed in this paper. Within the broad class of multi-phase systems there are further sub-classes, namely alternating current drive and unidirectional current drives. Thus the branching of these operating modes gives rise to a variety of operating modes. Each one of these operating modes is described and simulation results are presented.
补偿脉冲交流发电机(强制器)是一种多功能电源,能够以各种方式与电磁发射器接口。已经用几个系统详细探讨过的方法是单相选择。这种选择的几种变体,一些使用先进的脉冲整形技术,已经在以前的出版物中讨论过。除了这种基本的单脉冲操作方法外,还有几种其他方法,每种方法各有优缺点。本文讨论了多相选择。在多相系统的广泛类别中,还有进一步的子类,即交流驱动和单向电流驱动。因此,这些操作模式的分支产生了各种操作模式。对每一种工作模式进行了描述,并给出了仿真结果。
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引用次数: 6
A high temperature pulsed corona plasma reactor 高温脉冲电晕等离子体反应器
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596470
R. Korzekwa, L. Rosocha
Nonthermal plasma reactors have recently been used for the treatment of gaseous pollutants. High energy electrons (several eV) are produced in the plasma while the gas remains near ambient temperatures. Pollutant molecules are decomposed by highly reactive chemical radicals created through electron collisions. The focus of this work is the treatment of pollutants from the exhaust of electric arc incinerators. A pulsed corona reactor capable of operation at exhaust temperatures of hundreds of degrees C has been constructed. This design can be used as a conventional pulsed corona reactor (wire-metal tube geometry) and has the potential for use as a hybrid reactor which incorporates a wire-tube geometry with a ceramic dielectric barrier on the inside surface of the metal tube. Pulse widths of a few 10's of ns and risetimes of less than 10 ns have been obtained. Specifically, the reactor performance as a function of temperature is investigated. The preliminary results of the destruction of gaseous pollutants from this prototype are presented along with electrical and chemical efficiencies of the device.
非热等离子体反应器最近被用于处理气态污染物。高能电子(几个eV)在等离子体中产生,而气体保持在环境温度附近。污染物分子被电子碰撞产生的高活性化学自由基分解。本工作的重点是电弧焚烧炉废气中污染物的处理。一个脉冲电晕反应堆能够在几百摄氏度的排气温度下运行。这种设计可以用作传统的脉冲电晕反应器(线-金属管几何形状),也有可能用作混合反应器,该混合反应器将线管几何形状与金属管内表面的陶瓷介电屏障结合在一起。脉冲宽度为几ns,上升时间小于10ns。具体来说,研究了反应器性能随温度的变化规律。从这个原型气体污染物的破坏的初步结果,以及该装置的电气和化学效率。
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引用次数: 4
Methods of improving the pulse repetition frequency of high pressure gas switches 提高高压气体开关脉冲重复频率的方法
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596488
S. Macgregor, S. Turnbull, F. A. Tuema, A. Phelps
This paper describes several methods which have been developed to improve the pulse repetition frequency (PRF) of high pressure spark gap switches. Under pulse charged conditions, the voltage recovery process of the spark gap has been shown to be restricted by the residual ion population. This may be minimised by applying a suitable bias voltage across the gap. It is also possible to manipulate the V-p characteristic of a spark gap to improve the rate of rise of recovery voltage by reducing the recovery voltage dependence upon pressure. The combination of these effects has been shown to reduce the voltage recovery time of pulsed charged spark gaps from several hundred ms to several ms. Under DC conditions, it is possible to employ a corona discharge, found in a highly nonuniform field, to stabilise and control the voltage breakdown process. The use of corona stabilisation has enabled the operation of a spark gap at a PRF of more than 5 kHz, without employing gas flow techniques.
本文介绍了提高高压火花隙开关脉冲重复频率的几种方法。在脉冲充电条件下,火花间隙的电压恢复过程受到残余离子数量的限制。这可以通过在间隙上施加合适的偏置电压来最小化。还可以通过控制火花间隙的V-p特性来降低恢复电压对压力的依赖,从而提高恢复电压的上升速率。这些效应的结合已被证明可以将脉冲充电火花间隙的电压恢复时间从几百毫秒减少到几毫秒。在直流条件下,可以使用在高度不均匀场中发现的电晕放电来稳定和控制电压击穿过程。使用电晕稳定技术,无需使用气体流动技术,就可以在PRF超过5 kHz的情况下操作火花间隙。
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引用次数: 11
Electron beam in an inductive storage circuit 电感存储电路中的电子束
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599766
A. Pashchenko, V. Novikov, Y. Tkach
This paper studies theoretically and numerically the process of break of a weakly inertial electron loop which is created in the inductive storage circuit. An appropriate modelling problem is solved and a hydrodynamic theory is constructed to describe the process.
本文从理论上和数值上研究了电感存储电路中产生的弱惯性电子环的破断过程。解决了适当的建模问题,并建立了水动力理论来描述这一过程。
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引用次数: 0
Effects of filtration on the impulse breakdown strength of high-purity water 过滤对高纯水冲击击穿强度的影响
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596686
V. Gehman, R.J. Gripshover, T. Berger, S. P. Bowen, R. Zia
High-purity water is the dielectric of choice for most pulsed-power machines. Increasing the electrical breakdown strength of high-purity water is one of the principle goals for pulsed power, because the energy density stored in the water increases as the square of the electric field. This paper concentrates on the impulse breakdown strength for long-stress times (i.e., greater than 65 microseconds). Previous work at Dahlgren has shown that the breakdown strength is independent of stress time in this regime. Our hypothesis is that impurities control the breakdown behavior of nominally high-purity water. Specifically, we present experimental data that shows the use of filtration methods designed to remove organic material and particulates (which don't affect the resistivity of water), improves the breakdown strength. Earlier results that showed a time variation for improvements in breakdown strength are explained. An experimental design to achieve even greater improvements in breakdown strength is presented.
高纯水是大多数脉冲动力机器选择的电介质。提高高纯水的电击穿强度是脉冲电源的主要目标之一,因为储存在水中的能量密度随着电场的平方而增加。本文主要研究长应力时间(即大于65微秒)的脉冲击穿强度。Dahlgren先前的工作表明,在这种情况下,击穿强度与应力时间无关。我们的假设是杂质控制着名义上的高纯水的分解行为。具体来说,我们提供的实验数据表明,使用过滤方法来去除有机物质和颗粒(不影响水的电阻率),可以提高击穿强度。早先的结果表明,时间变化的改进击穿强度的解释。一个实验设计,以实现更大的改进击穿强度提出。
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引用次数: 2
Design of a 130 kV pulsed power supply for a spacebased CO/sub 2/ laser 天基CO/sub /激光器130 kV脉冲电源设计
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.599732
M. Gollor, W. Schaper
By an advanced research programme, a concept for a space-based Doppler windlidar is established on the basis of an electron-beam sustained CO/sub 2/ laser. A mission time of 3 years corresponding to 10/sup 9/ laser pulses is projected. Aspects of a required 130 kV pulse transformer and a high voltage interconnection are studied on a breadboard model, which addresses selected space issues and investigates the feasibility of a compact low-mass design of less than 50 kg for the pulse transformer. The specified voltage pulse is generated by discharging a pulse forming network into the primary winding of the pulse transformer. The testing of the developed breadboard confirms the selected design. The measured pulse length is above 8 /spl mu/s and the pulse rise time is below 1.3 /spl mu/s. A successful long-term operation of more than 3.5 million pulses is completed.
通过一项先进的研究计划,建立了基于电子束持续CO/sub - 2/激光的天基多普勒风力雷达的概念。预计任务时间为3年,对应于10/sup / 9激光脉冲。在面包板模型上研究了所需的130千伏脉冲变压器和高压互连的各个方面,该模型解决了选定的空间问题,并研究了小于50千克的紧凑低质量脉冲变压器设计的可行性。通过将脉冲形成网络放电到脉冲变压器的初级绕组中来产生指定的电压脉冲。所开发的面包板的测试证实了所选择的设计。所测脉冲长度在8 /spl mu/s以上,脉冲上升时间在1.3 /spl mu/s以下。成功完成了超过350万个脉冲的长期运行。
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引用次数: 1
A new modulator design for the BMEWS transmitter 一种新的BMEWS发射机调制器设计
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596791
M. Grimes, M. Grothaus, W. North, D. Brittain, R. Norander, D. Kajonpong
The Ballistic Missile Early Warning System (BMEWS) is a family of radars that was designed and built in the late 1950s and early 1960s. Originally, there were three BMEWS sites: Thule, Greenland; Clear, Alaska; and Fylingsdale, England. Currently, there is only one remaining site, at Clear, Alaska, that still uses eighteen of the original design transmitters. Each transmitter uses a pair of modulating-anode klystrons which provide a combined peak output of 2.5 MW at 425 MHz with 2 ms pulses at 27 pps. Very few modifications have been implemented on the transmitters in the thirty years since the site became operational. Many of the parts required to service the equipment are now difficult to obtain and cost prohibitive. Southwest Research Institute (SwRI) has redesigned the pulse modulator for the transmitter final-stage power amplifier. The redesigned pulse modulator operates at -120 kV, uses a floating deck configuration, and is a form-fit-and-function replacement for the original unit. The design approach included: (1) minimizing the size of the floating chassis to reduce self-capacitance for reduced switch-tube power dissipation; (2) keeping support circuitry simple for fewer failures and ease of maintenance; and (3) using conventional parts to make the electronics supportable for many years to come.
弹道导弹预警系统(BMEWS)是在1950年代末和1960年代初设计和建造的一个系列雷达。最初,有三个BMEWS站点:格陵兰岛的图勒;清楚,阿拉斯加;和英国的费林斯代尔。目前,只剩下阿拉斯加的克利尔(Clear)一个发射场,仍在使用18台原始设计的发射机。每个发射机使用一对调制阳极速调管,在425 MHz时提供2.5 MW的联合峰值输出,在27 pps时提供2 ms脉冲。自该场址开始运作以来的30年里,对发射机进行的修改很少。维修设备所需的许多部件现在很难获得,而且成本过高。西南研究院对发射机末级功率放大器的脉冲调制器进行了重新设计。重新设计的脉冲调制器工作在-120千伏,采用浮动甲板配置,是原始装置的形式和功能替代品。设计思路包括:(1)减小浮动机箱尺寸,减小自容,降低开关管功耗;(2)保持支持电路简单,减少故障,便于维护;(3)使用传统部件使电子设备在未来许多年都可以使用。
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引用次数: 0
A pulse forming network design for electrothermal-chemical combustion characterization of solid propellants 固体推进剂电热化学燃烧特性的脉冲形成网络设计
Pub Date : 1995-07-03 DOI: 10.1109/PPC.1995.596493
M. Del Guercio, I. Stobie, G. Katulka, W. Oberle
The combustion of solid propellants subjected to plasma augmentation, has been studied with a 300 kJ maximum stored energy pulse forming network (PFN) in the range of 1 kJ/g of electrical energy over a 1.2 ms pulse length. A closed chamber vessel is used for the combustion of these solid propellants in which the plasma is injected via a plasma generator. To characterize the effects of such plasma augmentation on propellant combustion over a longer pulse length, this PFN was upgraded to a maximum stored energy output of 400 kJ with a 2.4 ms pulse length. This report discusses the theoretical calculations, PFN upgrade design and fabrication details. Also provided are the design and modifications of the plasma generator that allows a delayed plasma injection with respect to the propellent ignition. Details of the plasma delay firings are also discussed.
采用最大存储能量300 kJ脉冲形成网络(PFN),在1.2 ms脉冲长度1 kJ/g的电能范围内,研究了固体推进剂在等离子体增强作用下的燃烧。一个封闭的腔室容器用于燃烧这些固体推进剂,其中等离子体通过等离子体发生器注入。为了在更长的脉冲长度下表征等离子体增强对推进剂燃烧的影响,该PFN在2.4 ms脉冲长度下的最大存储能量输出为400 kJ。本文讨论了理论计算、PFN升级设计和制造的细节。还提供了关于推进剂点火允许延迟等离子体注入的等离子体发生器的设计和修改。讨论了等离子体延迟点火的细节。
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引用次数: 2
Design of the injection kicker magnet system for CERN's 14 TeV proton collider LHC 欧洲核子研究中心(CERN) 14tev质子对撞机LHC注入踢动磁体系统设计
L. Ducimetière, U. Jansson, G. Schroder, E. Vossenberg, M. Barnes, G. Wait
Two counter-rotating proton beams will be injected into the LHC at an energy of 450 GeV by two kicker magnet systems, producing magnetic field pulses of approximately 750 ns rise time and 6.6 /spl mu/s flat top duration. To avoid dilution of the beam emittance during injection, a stringent design requirement of the system is a flat top ripple of the magnetic field of less than /spl plusmn/0.5%. Both injection systems are composed of 4 travelling wave kicker magnets of 2.17 m length each, powered by pulse forming networks (PFNs) and matched to their characteristic impedance. To achieve the high required kick strength of 1.2 Tm, for a compact and cost efficient design, a comparably low characteristic impedance of 5 /spl Omega/ has been chosen. The electrical circuit of the system is being designed with the help of PSpice computer modelling. Most known parasitic elements are included in the model to obtain a realistic pulse response prediction. The present paper reports on design and modeling results of the LHC injection kicker magnet system that has several novel and demanding design requirements.
将两束反向旋转的质子束通过两个踢球磁体系统以450 GeV的能量注入大型强子对撞机,产生约750 ns上升时间和6.6 /spl mu/s平顶持续时间的磁场脉冲。为了避免注入过程中光束发射度的稀释,系统的严格设计要求是磁场的平顶纹波小于/spl plusmn/0.5%。两种注入系统均由4个行波踢脚磁铁组成,每个行波踢脚磁铁长度为2.17 m,由脉冲形成网络(pfn)供电,并与其特征阻抗相匹配。为了达到1.2 Tm的高踢腿强度,为了实现紧凑和经济的设计,选择了一个相对较低的特性阻抗,为5 /spl ω /。利用PSpice计算机建模软件对系统的电路进行了设计。大多数已知的寄生元件都包含在模型中,以获得真实的脉冲响应预测。本文报道了大型强子对撞机喷射式启动磁铁系统的设计和建模结果,该系统有几个新颖而苛刻的设计要求。
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引用次数: 23
期刊
Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference
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