Repititive highly collimated intense proton beam in the sub-MeV energy range produced by a compact tera-Watt femto-second laser

Takai, Mamiko; Daido, Hiroyuki; Sagisaka, Akito; Ogura, Koichi; Orimo, Satoshi; Kado, Masataka; Yogo, Akifumi; Mori, Michiaki; Hayashi, Yukio; Bulanov, S. V.; Fukumi, Atsushi*; Li, Z.*; Noda, Akira*; Nakamura, Shu

We obtain a highly collimated sub-MeV proton beam with divergence angle of 10 degrees during the interaction of a few terawatt table-top Titanium Sapphaire laser pulse with a thin-metalic foil. By using the proton beam, we obtain a good quality projection imaging of a micrometer size mesh structure. The quantitative characterization of the beam is carried out. The transverse emittance of the beam is obtained to be less than 0.1 mm mrad.