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首页> 外文会议>Society of Photo-Optical Instrumentation Engineers Conference on Soft X-Ray Lasers and Applications >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：软X射线激光干涉测量/爆炸丝等离子体的影子图

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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 25 μm diameter excited by current pulses with a 78 A/ns 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：我们使用毛细管排放泵浦46.9nm激光器和衍射光栅干涉仪的电流驱动的薄线等离子体的软X射线激光干涉测量/阴影图像的结果。我们已经获得了一系列软X射线图像，用于爆炸直径为15μm或25μm的爆炸。在该波长处的原子和低电荷离子的高光电电离横截面允许软X射线激光探针检测形成围绕线芯的冠状等离子体的早期阶段。通过电流脉冲激发的电线为25μm，观察到具有78A / NS增加速率的电流脉冲，以均匀地膨胀。然而，观察到每单位质量沉积的能量率的增加，以产生显着的不稳定性。结束移位和软X射线吸收数据的同时分析表明冠状血浆含有显着浓度的低Z杂质。结果说明了台式软X射线激光器是致密等离子体诊断的强大新工具。

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