表面粗糙度在飞秒laser铜等离子体硬X射线发射中的作用
Role of surface roughness in hard x-ray emission from femtosecond laser produced copper plasmas
摘要：
研究了10 $^{-2}$、10 $^{15}-10^{16}$ W cm、100 fs、806 nm激光脉冲在铜等离子体中产生的30-300 keV硬X射线辐射。我们表明，表面粗糙度的目标覆盖的光耦合到等离子体中的偏振态的作用。我们进一步表明，表面粗糙度在提高上述能量范围内的X射线发射有显着的作用。
英文摘要：
The hard x-ray emission in the energy range of 30-300 keV from copper plasmas produced by 100 fs, 806 nm laser pulses at intensities in the range of 10$^{15}-10^{16}$ W cm$^{-2}$ is investigated. We demonstrate that surface roughness of the targets overrides the role of polarization state in the coupling of light to the plasma. We further show that surface roughness has a significant role in enhancing the x-ray emission in the above mentioned energy range.
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