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Souda, H.

Paper Title Page
MOP060 Quality Improvement of Laser-produced Protons by Phase Rotation and its Possible Extension to High Energies 214
  • A. Noda, Y. Iwashita, H. Souda, H. Tongu, A. Wakita
    Kyoto ICR, Uji, Kyoto
  • H. Daido, M. Ikegami, H. Kiriyama, M. Mori, M. Nishiuchi, K. Ogura, S. Orimo, A. Sagisaka, A. Yogo
    JAEA/Kansai, Kizu-machi Souraku-gun Kyoto-fu
  • A. Pirozhkov
    JAEA, Ibaraki-ken
  • T. Shirai
    NIRS, Chiba-shi

Funding: This work is supported by Advanced Compact Accelerator project by MEXT of Japanese Government and 21COE of Kyoto University, Center for Diversity and Universality in Physics.
By the phase rotation with the use of rf electric fields created by two gap resonator synchronous to a pulse laser, the energy spread of the laser-produced ions can be reduced*. In addition, owing to the curved structure of the electric field line in the gaps of the phase rotator, radial focusing effect is found also to exist. In order to extend the applicable energy of the phase rotation to the region where such laser produced protons can be directly applied for cancer therapy, multi-gap resonator with higher frequency has been proposed. By controlling the relative phases between the pulse laser and the electric fields in the gaps of phase rotator, we can create peaks in the energy spectrum simultaneously focusing in the radial direction.

* Japanese Journal of Applied Physics (Express Letter), 46 (2007) L717-L720