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Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium最新文献

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A Same-Scale Comparison of Electromagnetic Launchers 电磁发射器的同尺度比较
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365270
T. Engel, J. Neri, W. Nunnally
A same-scale comparison of conventional railguns, augmented railguns, and helical launchers is presented and discussed. While the ideal launcher is always 100% efficient, practical launchers have an efficiency which is a function of the projectile velocity and a new parameter called the characteristic velocity. The characteristic velocity is the velocity needed for 50% maximum efficiency. The motivation for a same-scale comparison is an accounting for the velocity-dependent efficiency effect. The same scale concept states that launcher comparisons should be done on an equal bore diameter, launcher length, projectile mass, and velocity basis. Other parameters developed by the authors and included in the analysis, are the launcher constant and the mode constant that account for the launcher geometry and the mode of operation, respectively. The analysis uses experimental data collected by the authors with conventional railgun, augmented railgun, and helical gun launchers
对常规轨道炮、增强型轨道炮和螺旋发射器进行了同尺度比较。虽然理想的发射器总是100%的效率,但实际的发射器的效率是弹丸速度和一个称为特征速度的新参数的函数。特征速度是50%最高效率所需的速度。进行相同尺度比较的动机是考虑速度相关的效率效应。相同比例的概念表明,发射比较应该在一个相等的口径,发射长度,弹丸质量,和速度的基础上完成。作者开发并包括在分析中的其他参数是分别说明发射装置几何形状和操作方式的发射常数和模式常数。分析使用了作者使用常规轨道炮、增强轨道炮和螺旋炮发射器收集的实验数据
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引用次数: 11
The Marx Modulator Development Program for the International Linear Collider 国际直线对撞机马克思调制器发展计划
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365274
G. Leyh
The ILC Marx modulator development program at SLAC is working towards developing a full-scale ILC Marx 'reference design' modulator prototype, with the goal of significantly reducing the size and cost of the ILC modulator, while improving overall modulator efficiency and availability. The ILC reference design prototype will provide a proof-of-concept model to industry in advance of phase II SBIR funding, and also allow operation of the new 10MW L-Band Klystron prototypes immediately upon their arrival at SLAC
SLAC的ILC Marx调制器开发项目正致力于开发全尺寸ILC Marx“参考设计”调制器原型,其目标是显着减小ILC调制器的尺寸和成本,同时提高整体调制器的效率和可用性。ILC参考设计原型将在第二阶段SBIR资金之前为工业界提供概念验证模型,并且还允许新的10MW l波段速调管原型在到达SLAC后立即运行
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引用次数: 2
Compact Modulator For High Power Microwave Systems 高功率微波系统的紧凑型调制器
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365268
K. McDonald
Sci-Eng solutions has made significant progress towards the development of a "direct-drive" Marxed-coiled transmission pulse generator that incorporates solid dielectric nano-ceramic polymer coaxial transmission lines that are spiraled into axial coil "compact disks" and switched in a Marx generator configuration to produce high-voltage flat-topped pulses into narrow band high power microwave sources such as relativistic magnetrons
Sci-Eng解决方案在“直接驱动”马氏线圈传输脉冲发生器的开发方面取得了重大进展,该脉冲发生器结合了固体介质纳米陶瓷聚合物同轴传输线,这些传输线螺旋形成轴向线圈“光盘”,并在马氏发生器配置中切换,产生高压平顶脉冲,进入窄带高功率微波源,如相对论磁控管
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引用次数: 4
Scaled-Up LGPT (Laser Gated and Pumped Thyristor) Devices at KrF IFE (Inertial Fusion Energy) Operating Parameters 按比例放大的激光门控泵浦晶闸管(LGPT)器件在KrF IFE(惯性聚变能)工作参数下的应用
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365217
D. Weidenheimer, D. Morton, G. James, D. Giorgi, T. Navapanich, D. Knudsen, R. Knight
The LGPT devices are performing to specification in both di/dt and action per unit area, and have demonstrated durability beyond 107 shots at system rep-rate (5-7 pps). The present devices represent minimum-size building-block units for use in near and far-term KrF IFE laser drivers, and they employ on-board optical sources for direct illumination of the silicon thyristor structure. Typical operating parameters for the devices undergoing durability tests are 16.4 kV forward blocking, peak currents of 1.5 to 2.5 kA per cm2, for an 800 ns pulsewidth, and di/dt's of up to 25 kA/usec/cm2. Two practical methods are there for directly illuminating the silicon: through the electrode surfaces as has been practiced for the past 5 years, and a new method employing the laser bar arrays in a side-shine geometry. The nearest-term application for the devices is in the retro-fitting of the FE2 laser pre-amplifier. This driver employs a topology that is scaleable to KrF IFE power generation. It is a fast Marx-charged, single-stage magnetic pulse compressor. The Marx, as delivered in 2004, is gas-switched, but specifically designed to be retro-fitted with the first generation of the program's LGPT's. Full scale KrF IFE-class pulsed power compressors have also been conceptualized, and will be utilized in those full-scale designs in a follow-up program to further develop the technology
LGPT设备在di/dt和单位面积动作方面都符合规范,并且在系统重复速率(5- 7pps)下的耐久性超过107次。目前的器件代表了用于近期和长期KrF IFE激光驱动器的最小尺寸构件单元,并且它们采用板载光源直接照明硅晶闸管结构。进行耐久性测试的设备的典型工作参数为16.4 kV正向阻塞,峰值电流为1.5至2.5 kA/ cm2,脉宽为800 ns, di/dt高达25 kA/usec/cm2。有两种实用的方法可以直接照亮硅:通过电极表面,这是过去5年来一直在实践的,还有一种新方法是采用侧面发光几何形状的激光棒阵列。该器件最近的应用是FE2激光前置放大器的改装。该驱动程序采用可扩展到KrF IFE发电的拓扑结构。它是一个快速的马克思充电,单级磁脉冲压缩机。2004年交付的“马克思”号是燃气开关的,但专门设计用于改装该计划的第一代LGPT。全尺寸KrF ife级脉冲功率压缩机也已概念化,并将在后续项目中用于全尺寸设计,以进一步开发该技术
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引用次数: 5
Production of Atmospheric-Pressure Glow Using Inductive Energy Storage System Pulsed Power Generator 电感储能脉冲电源产生常压辉光
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365251
K. Takaki, H. Kirihara, C. Noda, S. Mukaigawa, T. Fujiwara
An atmospheric pressure glow discharge was generated using a needle-array electrode in nitrogen. A pulsed high voltage with short rise time under 10 ns was employed to generate streamer discharges simultaneously at all needle tips. The large number of streamer discharges prevented glow-to-arc transition caused by inhomogeneous thermalization. Semiconductor opening switch (SOS) diodes were employed as an opening switch to shorten the rise time. The glow current was drastically decreased by eliminating the SOS diode, in which case the charging voltage was directly applied to the electrode. Spatial- and time-averaged electron densities in a positive column were estimated from calculations based on nitrogen swarm data. The density was estimated to be 1.8times1011 cm-3, which was much larger than 9.7times109 cm-3 in the case without the SOS diode
用针阵电极在氮气中产生常压辉光放电。在10 ns的短上升时间脉冲高压下,在所有针尖同时产生流光放电。大量的流光放电防止了由不均匀热化引起的辉光到电弧的转变。采用半导体开启开关(SOS)二极管作为开启开关,缩短了上升时间。通过消除SOS二极管,发光电流急剧下降,在这种情况下,充电电压直接施加到电极上。基于氮群数据的计算估计了正极柱的空间和时间平均电子密度。估计密度为1.8 × 1011 cm-3,远大于未添加SOS二极管时的9.7 × 109 cm-3
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引用次数: 0
On Electromagnetic Processes in HV Transformers of Switching-Mode Power Supplies at No-Load Conditions 空载条件下开关式电源高压变压器电磁过程研究
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365239
A. Pokryvailo
When applying some kind of waveform to the primary of a transformer, one expects to see a more or less resembling waveform at the secondary. This is not the case for high-frequency HV transformers. The basic reason is that the parasitic parameters (PP) (leakage inductance and numerous parasitic capacitances) have a considerable influence on the transformer performance. HV transformer equivalent circuits are discussed, and the choice of one for further analysis is theoretically and experimentally justified. It is shown that HV rectifier/multiplier adds considerably to the parasitic capacitance of the secondary winding at no-load conditions. Further analysis concentrates on the electromagnetic processes in a transformer fed by a square-wave voltage, which is characteristic for no-load operation. Overvoltages (OV), i.e., ratio of the maximum voltage at the secondary to that calculated by the transformation ratio, generated by high harmonics are analyzed using Fourier transform. For special cases of asymmetrical waveshapes, closed-form expressions are obtained. The influence of the primary voltage risetime on the OV is also analyzed. It is shown that the characteristic OV is close to three for steep risetimes. Main conclusions were upheld by PSpice simulations and experimental investigation
当将某种波形应用于变压器的初级时,人们期望在次级处看到或多或少类似的波形。高频高压变压器的情况并非如此。其根本原因是寄生参数(PP)(漏感和众多寄生电容)对变压器性能有相当大的影响。对高压变压器等效电路进行了讨论,并从理论上和实验上证明了选择一种电路进行进一步分析是合理的。结果表明,高压整流器/乘法器在空载条件下显著增加了二次绕组的寄生电容。进一步的分析集中在由方波电压供电的变压器中的电磁过程,这是空载运行的特征。利用傅里叶变换分析了高次谐波产生的过电压(OV),即次级最大电压与由变换比计算得到的电压之比。对于非对称波形的特殊情况,得到了封闭表达式。分析了一次电压上升时间对电压电压的影响。结果表明,陡升时的特征OV接近于3。PSpice模拟和实验研究支持了主要结论
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引用次数: 5
Investigation of Surface Flashover on Dielectrics Enhanced by Excimer Laser Processing 准分子激光增强介质表面闪络的研究
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365186
W. J. Sarjeant, J. Zirnheld, J. Berkow, P. Strzempka, J. Cieri
One of the factors that contributes to surface flashover on dielectrics is the existence of defects on the surface of the material. For our studies, excimer laser processing was utilized on alumina dielectrics in an attempt to substantially increase the threshold voltages for flashover. Through excimer laser processing, the surface material melts and re-crystallizes to form a uniform surface structure. The defects on the dielectric surface can be minimized, reducing charge trapping, leading to higher flashover voltages. Two sets of samples were tested. The first set of samples was processed using the laser and the second set was not. The samples were then stressed under high voltage to induce surface flashover. Analysis of the effects of the excimer laser processing was performed and are shown
导致电介质表面闪络的因素之一是材料表面存在缺陷。在我们的研究中,利用准分子激光处理氧化铝电介质,试图大幅度提高闪络的阈值电压。通过准分子激光加工,使表面材料熔化再结晶,形成均匀的表面结构。电介质表面的缺陷可以最小化,减少电荷捕获,从而导致更高的闪络电压。对两组样本进行了测试。第一组样品用激光处理,第二组没有。然后在高压下对样品施加应力以诱发表面闪络。对准分子激光加工的影响进行了分析
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引用次数: 2
Pulse Discharge Characteristics of Surface Mount Capacitors 表面贴装电容器的脉冲放电特性
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365201
W. J. Carey, A. Wiebe, L. L. Altgilbers, W. Nunnally
ARC Technology is developing pulse generators for extremely compact geometries requiring megawatts of power and millijoule to joule of total energy. These devices are to be constructed with surface mount components and circuit board fabrication techniques to minimize volume, cost, and production time. Clearly, the components in these circuits are operating well beyond their design specifications. Therefore, this paper examines the energy storage and peak power capabilities of various surface mount capacitor technologies and vendors to determine their applicability in miniature pulsed power circuits
ARC技术公司正在开发用于极其紧凑的几何形状的脉冲发生器,需要兆瓦级的功率和毫焦耳到焦耳的总能量。这些器件将采用表面贴装元件和电路板制造技术,以最大限度地减少体积、成本和生产时间。显然,这些电路中的组件的运行远远超出了它们的设计规格。因此,本文考察了各种表面贴装电容器技术和供应商的储能和峰值功率能力,以确定它们在微型脉冲功率电路中的适用性
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引用次数: 0
Analytical Modeling of Pulse Transformers for Power Modulators 功率调制器脉冲变压器的解析建模
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365200
J. Biela, D. Bortis, J. Kolar
The parasitic capacitances of transformers significantly influence the resulting pulse shape of a power modulator system. In order to predict the pulse shape and optimize the geometry of the pulse transformer before building the transformer, an equivalent circuit and analytic expressions relating the geometry with the parasitic elements are needed. Therefore, a model consisting of 6 equivalent capacitors and a simplified circuit, as well as the belonging equations, are presented. The equations are verified by measurement results for a pulse transformer and a solid-state modulator designed for linear accelerators
变压器的寄生电容对功率调制器系统的脉冲形状有很大的影响。为了在构建脉冲变压器之前预测脉冲形状和优化脉冲变压器的几何形状,需要等效电路和几何形状与寄生元件的解析表达式。为此,提出了一个由6个等效电容组成的模型和简化电路,并给出了相应的方程。通过对线性加速器用脉冲变压器和固态调制器的测量结果验证了上述方程的正确性
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引用次数: 13
Fundamental Properties of OFF-ON Resistance of a New Type Self-recovering Fuse Operated by Dielectrophoresis 新型介质电泳自恢复熔断器开关电阻基本特性研究
Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365287
S. Ohtsuka, H. Suetomi, M. Hikita
This paper deals with fundamental properties of the OFF to ON state transition of a new type of self-recovering fuse (SRF) device operated by dielectrophoresis (DEP) we have proposed and developed. This fuse device basically consists of electrodes made on a substrate, a fuse element to make and break the conducting path between the electrode gap, and liquid matrix as insulation media to cover the fuse element and the electrodes. The self-recovering operation, i.e. the OFF to ON state transition, is mainly controlled by DEP and viscous forces. In this study, we experimentally investigated influence of the liquid matrix and the substrate material on the OFF and ON resistances of the SRF device in terms of improvement of the resistance characteristics. We also investigated the effect of a mechanical impact or vibration on the ON state properties. As a result, we achieved the OFF resistance more than 1 MOmega without remarkably increasing the ON resistance, by using silicone oil as liquid matrix and the glass substrate. We confirmed the self-recovering operation by DEP and the maintaining ON state under both DC and high frequency (up to 100 kHz) AC voltage applications. In addition, the mechanical impact endurance of the SRF device was basically found
本文讨论了我们提出和研制的一种新型介电电泳(DEP)自恢复熔断器(SRF)从OFF到ON状态转换的基本性质。这种熔断器基本上由在基板上制作的电极、在电极间隙之间形成和切断导电路径的熔断器元件和作为绝缘介质覆盖熔断器元件和电极的液体基质组成。自恢复操作,即OFF到ON的状态转换,主要由DEP和粘性力控制。在本研究中,我们从改善电阻特性的角度,实验研究了液体基质和衬底材料对SRF器件的OFF和on电阻的影响。我们还研究了机械冲击或振动对on态性能的影响。因此,我们通过使用硅油作为液体基质和玻璃基板,在不显著增加ON电阻的情况下,实现了超过1 ω的OFF电阻。我们证实了DEP的自恢复操作,并在直流和高频(高达100 kHz)交流电压应用下保持ON状态。此外,基本发现了SRF装置的机械冲击耐久性
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引用次数: 4
期刊
Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium
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