超短パルス・超高強度レーザーを用いた高エネルギー陽子線/イオン線の発生とその利用

The authors have described the unique points of the ultra-high intensity laser driven proton and ion sources which include point like source, ultra-short burst, diverging beam with wide energy spectral band. They emphasize that such significant features should be taken into account in the real applications. Then the features of the laser source can make benefit. In the present stage, a thin layer activation technique and the relevant subjects of proton and ion irradiation to the practical materials are good candidate of this technique. The future medical application is also described briefly.