@article{oai:kanazawa-u.repo.nii.ac.jp:00060843,
 author = {長井, 圭治 and Nishiuchi, M. and Daido, H. and Yogo, A. and Orimo, S. and Ogura, K. and Ma, J. and Sagisaka, A. and Mori, M. and Pirozhkova, A. S. and Kiriyama, H. and Bulanov, S. V. and Esirkepov, T. Zh. and Choi, Il Woo and Yu, Tae Jun and Shung, Jae Hee and Jeong, Tae Moon and Kim, Hyung Taek and Hong, Kyung-Ham and Noh, Young-Chul and Ko, Do-Kyeong and Lee, Jongmin and Oishi, Y. and Nemoto, K. and Nagatomo, H. and Nagai, Keiji},
 journal = {AIP Conference Proceedings},
 month = {Jun},
 note = {Highlly collimated energetic protons whose energies are up to 4 MeV are generated by an intense femtosecond Titanium Sappheire laser pulse interacting with a 7.5, 12.5, and 25 μm-thick Polyimide tape target and 5 μm-thick copper target. We find no clear difference on the proton spectra from 7.5, 12.5, and 25 μm Polyimide tape target. The highest conversion efficiency from laser energy into protons of ∼3% is observed with a 7.5 μm thick Polyimide target. The quality of the proton beam is good enough to obtain a clear projection image of a mesh having 10 μm line and space structure, installed into the passage of the beam. We obtain clear vertical lines on the proton intensity profiles from the copper target, which are considered to be transferred from the surface of the copper target. From it, we can restrict the size of the proton emitting region to be ∼20μm. © 2008 American Institute of Physics., Embargo Period 12 months, 金沢大学先端科学・社会共創推進機構},
 pages = {137--150},
 title = {Femtosecond laser driven high-flux highly collimated MeV-proton beam},
 volume = {1024},
 year = {2008}
}