Enhanced magnetic energy released in solid-state and plasma loads on a nanosecond pulse power generator

A. Chuvatin, V. Kantsyrev, A. Astanovitskiy, R. Presura, A. Safronova, A. Esaulov, W. Cline, K. Williamson, I. Shrestha, M. Yilmaz, G. Osbome, T. Jarrett, B. LeGalloudec, N. Nalajala, L. Rudakov, M. Cuneo, T. Pointon, K. Mikkelson
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Abstract

The requirements on lossless power transport through vacuum interface and MITL's limit from above the physical volume and hence inductance of the vacuum part of pulse power generators. This in turn limits the generator-to-load energy coupling and hence the magnetic energy available in vacuum loads used in high energy density physics research. We obtained on Zebra generator (1.9 Ohm, 1 MA, 100 ns) an enhanced load magnetic energy corresponding to the load current increase from the nominal 0.95 MA to 1.65 (plusmn0.05) MA. This improvement was achieved without changing the generator architecture, but through better generator-to-load energy coupling using the new Load Current Multipliers (LCM) technique. The average experimental load-to-generator current amplitude ratio in LCM with both a 7 nH constant-inductance load and with z-pinch loads was 1.7plusmn0.2. We report on new generator electrotechnical parameters with LCM and on characterization of the plasma dynamics and radiative properties of planar wire-array z-pinches at the achieved enhanced load magnetic energy level.
在纳秒脉冲发电机上固态和等离子体负载释放的增强磁能
脉冲发电机真空部分的物理体积和电感对真空界面无损传输功率的要求和MITL的限制。这反过来又限制了发电机与负载的能量耦合,从而限制了用于高能量密度物理研究的真空负载中可用的磁能。我们在Zebra发电机(1.9欧姆,1 MA, 100 ns)上获得了负载磁能的增强,对应于负载电流从标称的0.95 MA增加到1.65 (plusmn0.05) MA。这一改进在不改变发电机结构的情况下实现,但通过使用新的负载电流乘法器(LCM)技术实现了更好的发电机-负载能量耦合。在7 nH恒感负载和z夹紧负载下,LCM的平均实验负载与发电机电流幅值比为1.7±0.2。我们报道了新的LCM发电机的电工技术参数,以及在提高负载磁能水平下平面线阵z-钳位的等离子体动力学和辐射特性的表征。
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