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首页> 外文期刊>Journal of Experimental and Theoretical Physics >X-ray Spectroscopy Diagnostic of a Plasma Produced by Femtosecond Laser Pulses Irradiating a Cluster Target
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X-ray Spectroscopy Diagnostic of a Plasma Produced by Femtosecond Laser Pulses Irradiating a Cluster Target

机译：飞秒激光脉冲辐照簇状靶标产生的等离子体的X射线光谱诊断

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摘要

The parameters of a plasma produced upon the interaction of ultrashort laser pulses with cluster targets are measured by the methods of X-ray spectroscopy. The dependence of the plasma parameters on the initial properties of a cluster target (the design of a supersonic nozzle, the average size of clusters, the spatial inhomogeneity) and the laser pulse properties (its duration and contrast) is studied. The plasma diagnostics is performed using the model of formation of emission spectra, which was proposed earlier and includes a number of fitting parameters, which provide good agreement with experimental spectra. The systematic experimental studies performed by us showed that our model of cluster heating by ultrashort pulses is indeed a physical model, and the fitting parameters represent the average values of plasma parameters in the corresponding space-time regions.
机译：通过X射线光谱法测量在超短激光脉冲与团簇靶相互作用时产生的等离子体的参数。研究了等离子体参数对团簇靶的初始特性（超音速喷嘴的设计，团簇的平均尺寸，空间不均匀性）和激光脉冲特性（其持续时间和对比度）的依赖性。等离子体诊断是使用较早提出的发射光谱形成模型进行的，该模型包括许多拟合参数，这些参数与实验光谱具有良好的一致性。我们进行的系统实验研究表明，我们的超短脉冲团簇加热模型确实是一个物理模型，拟合参数代表相应时空区域中等离子体参数的平均值。

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