The role of hollow atoms in the spectra of an ultrashort-pulse-laser-driven Ar cluster target
The role of hollow atoms in the spectra of an ultrashort-pulse-laser-driven Ar cluster target
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DOI：
10.1017/s0263034608000116
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发表时间：
2008-03
影响因子：
0.9
通讯作者：
J. Colgan;J. Abdallah;A. Faenov;T. Pikuz;I. Skobelev;V. Fortov;Y. Fukuda;Y. Akahane;M. Aoyama-M
中科院分区：
文献类型：
--
作者：
J. Colgan;J. Abdallah;A. Faenov;T. Pikuz;I. Skobelev;V. Fortov;Y. Fukuda;Y. Akahane;M. Aoyama-M
研究了中空原子在超短脉冲激光驱动的Ar团簇靶谱中的作用。用不同强度、不同持续时间和不同对比度的短脉冲激光对Ar团簇气体靶进行了实验测量。使用详细的原子动力学模型进行了支持这些测量的计算，并从随时间变化的速率方程的解中找到了离子分布。计算结果与测量结果吻合较好，并分析了空心原子在复杂光谱中的作用。结果表明，虽然空心原子的存在估计只增加了约2%的谱线发射，但在计算中可以识别出空心原子光谱的特征，并得到了实验测量的定性支持。
An investigation is made of the role of hollow atoms in the spectra of an ultrashort-pulse-laser-driven Ar cluster target. Experimental measurements are presented from an Ar cluster-gas target using short-pulse lasers with various intensities, durations, and contrasts. Calculations in support of these measurements have been performed using a detailed atomic kinetics model with the ion distributions found from solution of the time-dependent rate equations. The calculations are in good agreement with the measurements and the role of hollow atoms in the resulting complicated spectra is analyzed. It is demonstrated that, although the presence of hollow atoms is estimated to add only around 2% to the total line emission, signatures of hollow atom spectra can be identified in the calculations, which are qualitatively supported by the experimental measurements.