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首页> 外文会议>Conference on Soft X-Ray Lasers and Applications V; Aug 6-7, 2003; San Diego, California, USA >Soft x-ray laser interferometry/shadowgraphy of exploding wire plasmas
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Soft x-ray laser interferometry/shadowgraphy of exploding wire plasmas

机译：爆炸等离子线的软X射线激光干涉法/阴影图

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摘要

We present results from soft x-ray laser interferometry/shadowgraphy of current-driven thin wire plasmas using a capillary discharge pumped 46.9 nm laser and a diffraction grating interferometer. We have obtained series of soft x-ray images of exploding Al wires 15 μm or 25 μm in diameter. The high photo-ionization cross sections of atoms and low charge ions at this wavelength allow the soft x-ray laser probe to detect the early stages of formation of a coronal plasma surrounding the wire core. Wires of 25μm diameter excited by current pulses with a 78 As increase rate are observed to expand uniformly. However, an increase in the rate of energy deposited per unit of mass is observed to give rise to significant instabilities. The simultaneous analysis of the fringe shift and soft x-ray absorption data suggests the coronal plasma contains a significant concentration of low Z impurities. The results illustrate that table-top soft x-ray lasers are a powerful new tool for the diagnostics of dense plasmas.
机译：我们目前的结果来自使用驱动46.9 nm毛细管放电的毛细管放电和衍射光栅干涉仪的电流驱动细线等离子体的软X射线激光干涉法/阴影图。我们获得了爆炸的直径为15μm或25μm的Al线的一系列软X射线图像。原子的高光电离截面和低电荷离子在此波长下允许软X射线激光探针检测围绕线芯的日冕等离子体的形成早期。观察到由电流脉冲激发的直径为25μm的导线以78 A / ns的增加速率均匀扩展。然而，观察到每质量单位沉积能量的速率增加会引起明显的不稳定性。对边缘偏移和软X射线吸收数据的同时分析表明，冠状血浆中含有大量的低Z杂质。结果表明，台式软X射线激光器是用于诊断密集等离子体的强大新​​工具。

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