Laser -团簇相互作用：短脉冲laser产生的X射线
Laser-cluster interaction: x-ray production by short laser pulses
摘要：
研究了中等强度（I~10^{15} Wcm^{-2}）短脉冲激光对大团簇（N大于10^5原子）中准自由电子的加热.我们确定的弹性大角度背散射的电子在离子核中存在的激光场作为一个有效的加热机制类似的费米穿梭。它的效率以及集体电子运动，电子碰撞电离和集群充电的效果，采用平均场经典输运模拟研究。绝对X射线产率的结果与最近的实验结果在令人惊讶的良好的定量协议。
英文摘要：
We investigate the heating of the quasi-free electrons in large rare gas clusters (N exceeding 10^5 atoms) by short laser pulses at moderate intensities (I~10^{15} Wcm^{-2}). We identify elastic large-angle backscattering of electrons at ionic cores in the presence of a laser field as an efficient heating mechanism resembling the Fermi shuttle. Its efficiency as well as the effect of collective electron motion, electron-impact ionization and cluster charging, are studied employing a mean-field classical transport simulation. Results for the absolute x-ray yields are in surprisingly good quantitative agreement with recent experimental results.
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