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Laser-driven proton acceleration with a thin-foil target

Sagisaka, Akito; Nishiuchi, Mamiko; Pirozhkov, A. S.; Ogura, Koichi; Sakaki, Hironao; Maeda, Shota; Pikuz, T.; Faenov, A. Y.*; Fukuda, Yuji; Kanasaki, Masato; Matsukawa, Kenya*; Kando, Masaki; Kiriyama, Hiromitsu; Okada, Hajime; Kanazawa, Shuhei; Kondo, Shuji; Shimomura, Takuya; Nakai, Yoshiki*; Tanoue, Manabu; Sakai, Seiji; Watanabe, Yukinobu*; Yamauchi, Tomoya*; Esirkepov, T. Z.; Bulanov, S. V.; Kondo, Kiminori

High-intensity laser and thin-foil interactions produce high-energy particles, hard X-ray, high-order harmonics, and terahertz radiation. A proton beam driven by a high-intensity laser has received attention as a compact ion source for medical and other applications. We have performed several high intensity laser-matter interaction experiments using a thin-foil target irradiated by Ti:sapphire laser (J-KAREN) at JAEA. The pulse duration was typically $$sim$$40 fs (FWHM). The high-order harmonics (2nd$$sim$$4th) were observed with the spectrometer in the reflected direction. The maximum proton energy of $$sim$$40 MeV energy were observed at the peak laser intensity of $$sim$$1$$times$$10$$^{21}$$W/cm$$^{2}$$.

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