Ar原子团簇与飞秒强激光相互作用产生的高能离子计算

利用改进的“等离子体球”模型模拟了Ar原子团簇与飞秒强激光相互作用的物理过程.改进后的模型弱化了原模型在共振吸收附近团簇内部屏蔽电场的异常增强行为，从而使其更为合理，计算得到的Ar离子平均动能与以往的实验结果符合.还定量地研究了Ar离子平均动能及其平均电荷态与团簇尺寸以及激光参数之间的变化关系. 关键词： 团簇 飞秒激光 高能离子 共振吸收

Calculation of high-energy ions exploded from argon clusters in high intensity femtosecond laser pulses

The modified nanoplasma model has been used to simulate the interaction of large Ar clusters with high intensity femtosecond laser pulses. The modified model has weakened the huge enhancement of electric field inside the clusters, thus provides a more reasonable explanation. The calculated mean kinetic energy of Ar ions is in good agreement with our previous experimental results. For further experimental work, it is the quantitative analysis of the variation of the mean kinetic energy and charge states of Ar ions exploded from the interactions with thecluster size and laser intensity.