X-ray and fast ion generation from metal targets by femtosecond laser irradiation
X-ray and fast ion generation from metal targets by femtosecond laser irradiation
复制标题
通过飞秒激光照射从金属靶材产生 X 射线和快速离子
DOI：
10.1016/s0169-4332(02)00383-5
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发表时间：
2002
影响因子：
6.7
通讯作者：
K. Kondo
中科院分区：
文献类型：
--
作者：
Y. Okano;H. Kishimura;Y. Hironaka;K. Nakamura;K. Kondo
利用飞秒激光（52 fs，790 nm）辐照金属靶（铜和铁），在功率密度高达1017 W/cm ~ 2的条件下产生硬X射线，研究了X射线和快离子的产生。X射线强度和离子的动能分布观察作为功率密度的函数。每个靶的离子能量分布显示出几个峰值分量，它们是快离子（keV范围内的高能分量）和附加的低能分量（几百eV）。平均快离子能量表现出强烈的依赖于功率密度，并与有质动力势。
X-ray and fast ion generation has been studied by femtosecond laser irradiation (52fs, 790nm) on metal targets (copper and iron), where hard X-ray emission takes place at power density up to 1017W/cm2. X-ray intensities and kinetic energy distributions of ions are observed as a function of the power density. The ion energy distributions for each target show several peak components, which are fast ions (high-energy component in keV range), and additional low-energy component (a few hundreds of eV). Average fast ion energies show a strong dependence on the power density, and are comparable to ponderomotive potential.