High-Energy Ions Emitted from Ar Clusters Irradiated by Intense Femtosecond Laser Pulses
High-Energy Ions Emitted from Ar Clusters Irradiated by Intense Femtosecond Laser Pulses
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DOI：
10.1088/0256-307x/17/2/008
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发表时间：
2000-02
影响因子：
3.5
通讯作者：
Zhong Li;A. Lei;G. Ni;Zhi‐zhan Xu
中科院分区：
文献类型：
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作者：
Zhong Li;A. Lei;G. Ni;Zhi‐zhan Xu
实验研究了强飞秒激光脉冲辐照Ar团簇产生的Ar离子的能谱。Ar团簇是在高背压下Ar气体向真空中绝热膨胀过程中产生的。激光峰值强度为2 × 1016 W/cm ~ 2，脉宽为45 fs。在2.5MPa的背衬压力下，Ar离子的最大能量和平均能量分别为0.2MeV和15 keV。在0.6 ~ 4.5MPa范围内，它们几乎与背压无关。
We have experimentally studied the energy spectra of Ar ions emitted from Ar clusters irradiated by intense femtosecond laser pulses. The Ar clusters were produced in the adiabatic expansion of Ar gas into vacuum at high backing pressures. The laser peak intensity was about 2 × 1016 W/cm2 with a pulse duration of 45 fs. The maximum and the average energies of Ar ions are 0.2 MeV and 15 keV at a backing pressure of 2.5 MPa, respectively. They are almost independent of the backing pressures in the range of 0.6 to 4.5 MPa.