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Ion acceleration via "nonlinear vacuum heating" by the laser pulse obliquely incident on a thin foil target

Yogo, Akifumi*; Bulanov, S. V.; Mori, Michiaki; Ogura, Koichi; Esirkepov, T. Z.; Pirozhkov, A. S.; Kanasaki, Masato*; Sakaki, Hironao; Fukuda, Yuji; Bolton, P.; Nishimura, Hiroaki*; Kondo, Kiminori

The dependence of the energy of ions accelerated during the interaction of the laser pulse obliquely incident on the thin foil target on the laser polarization is studied experimentally and theoretically. We found that the ion energy being maximal for the p-polarization drastically decreases when the pulse becomes s-polarized. The experimentally found dependencies of the ion energy are explained by invoking anomalous electron heating, which results in high electrostatic potential formation at the target surface.

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Category:Physics, Fluids & Plasmas

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