Technique for fabrication of ultrathin foils in cylindrical geometry for liner-plasma implosion experiments with sub-megaampere currents.
Technique for fabrication of ultrathin foils in cylindrical geometry for liner-plasma implosion experiments with sub-megaampere currents.
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用于亚兆安电流线性等离子体内爆实验的圆柱形几何超薄箔的制造技术。
DOI：
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发表时间：
2015
影响因子：
1.6
通讯作者：
R. Gilgenbach
中科院分区：
文献类型：
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作者：
D. Yager;A. Steiner;S. Patel;N. Jordan;Y. Lau;R. Gilgenbach
在这项工作中，我们描述了一种技术，用于制造圆柱形的几何形状的衬等离子体内爆实验使用的亚MA电流的双金属箔。通过将400 nm的矩形铝箔带缠绕在具有非导电中心杆的哑铃形支撑结构周围来形成衬垫，使得衬垫尺寸为1 cm高、6.55 mm直径和400 nm厚度。使用1 MA线性Transformer驱动器，通过以约200 ns的上升时间放电约600 kA，使线性等离子体内爆，并且使用532 nm的激光阴影照相术对所产生的内爆每次拍摄成像四次。这种技术使等离子体内爆物理学的研究，包括磁瑞利-泰勒，香肠，扭结不稳定性的初始固体，内爆金属内衬与大学规模的脉冲功率机。
In this work, we describe a technique for fabricating ultrathin foils in cylindrical geometry for liner-plasma implosion experiments using sub-MA currents. Liners are formed by wrapping a 400 nm, rectangular strip of aluminum foil around a dumbbell-shaped support structure with a non-conducting center rod, so that the liner dimensions are 1 cm in height, 6.55 mm in diameter, and 400 nm in thickness. The liner-plasmas are imploded by discharging ∼600 kA with ∼200 ns rise time using a 1 MA linear transformer driver, and the resulting implosions are imaged four times per shot using laser-shadowgraphy at 532 nm. This technique enables the study of plasma implosion physics, including the magneto Rayleigh-Taylor, sausage, and kink instabilities on initially solid, imploding metallic liners with university-scale pulsed power machines.