Soft X-ray emission from laser-irradiated gold foils
Soft X-ray emission from laser-irradiated gold foils
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DOI：
10.1063/1.5036934
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发表时间：
2018-07
影响因子：
2.2
通讯作者：
J. S. Davis;R. P. Drake;M. Fraenkel;Y. Frank;P. Keiter;S. Klein;E. Raicher;D. Shvarts;M. Trantham
中科院分区：
文献类型：
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作者：
J. S. Davis;R. P. Drake;M. Fraenkel;Y. Frank;P. Keiter;S. Klein;E. Raicher;D. Shvarts;M. Trantham
本文报道了6ns激光脉冲照射下金箔软x射线发射的测量结果，并对观测结果进行了分析和模拟。这些箔片可以用作x射线源，以驱动广泛的实验。多通道光电二极管阵列测量了时间分辨的软x射线发射。软x射线分幅照相机在选定的能带上对辐射成像。铝箔厚度为0.5 ~ 1.5 μm。成像数据显示，发射软x射线的区域在整个激光驱动器的前后表面都在增长。考虑光斑尺寸随时间变化的后表面辐射通量分析表明，0.5 μm厚箔片的峰值有效温度接近88 eV， 0.75 μm厚箔片的峰值有效温度接近78 eV。利用蒙特卡罗方法计算了由信号电压变化和发射点尺寸不确定性引起的有效温度的不确定性分量。这被发现是…
This paper reports measurements of soft-x-ray emission from gold foils irradiated by 6 ns laser pulses, and analysis and simulations of the observations. These foils can be used as x-ray sources to drive a wide range of experiments. A multichannel, photodiode array measured the time-resolved, soft-x-ray emission. A soft-x-ray framing camera imaged the emission in selected energy bands. Foil thicknesses were from 0.5 to 1.5 μm. The imaging data show that the region emitting soft x-rays grows throughout the laser drive, on both the front and rear surfaces. Analysis of the emitted radiation flux from the rear surface, taking the time-dependent spot size into account, showed that the peak effective temperature of 0.5-μm-thick foils is near 88 eV, while that of 0.75-μm-thick foils is near 78 eV. A Monte Carlo method was used to evaluate the component of the uncertainty in the effective temperature introduced by variations in signal voltages and by uncertainty in the size of the emitting spot. This was found to...