Nonthermal particle spectra in ultra-intense laser–plasma interaction
Yulong Hu,
Xuesong Geng,
Hideaki Takabe
et al.
Abstract:Relativistic laser–plasma interaction can produce nonthermal electron spectra in power-law scaling. The power-law index for near-critical density plasmas changes between 1.8 and 2.0 as the laser intensity varies from the relativistic threshold to the radiation-dominated regime. While effective temperature of electrons is strongly suppressed by radiation–radiation effect, it is found that the nonthermal power-laws are consistent between the radiation OFF and ON cases. It decreases to ∼1.4 as plasma density beco… Show more
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