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Report No.
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Laser driven ion acceleration

Daido, Hiroyuki

This paper reviews the recent activities of laser-driven ion generation studies. First, the mechanisms of the ion generation are described including the plasma sheath model which describes energetic proton generation driven by sub-ps high energy lasers. A pre-pulse plays a significant role especially for the fs laser driven ion generation. The under-dense plasma model described here is one of the mechanisms, which utilize pre-pulses. The quasi-mono-energetic ion beam obtained theoretically and computationally is reviewed. Then the experimental results on the ion generation driven by sub-ps large energy lasers as well as fs lasers are reviewed. Although lower maximum proton energy and efficiency compared with those driven by sub-ps lasers at present, the results given by the fs lasers are precisely described because the fs lasers may be closer to real applications. Finally the present project on the ultra small ion accelerator development for cancer therapy and related topics are reviewed.

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