Author/Authors :
Wakita، نويسنده , , Akihisa and Iwashita، نويسنده , , Yoshihisa and Shirai، نويسنده , , Toshiyuki and Ikegami، نويسنده , , Masahiro and Tongu، نويسنده , , Hiromu and Souda، نويسنده , , Hikaru and Mori، نويسنده , , Michiaki and Yogo، نويسنده , , Akifumi and Orimo، نويسنده , , Satoshi and Nishiuchi، نويسنده , , Mamiko and Ogura، نويسنده , , Koichi and Sagisaka، نويسنده , , Akito and Ma، نويسنده , , J.-L. and P، نويسنده ,
Abstract :
We have succeeded to compress the energy spread of a laser-produced proton beam to 1.6% at FWHM by an RF electric field synchronous to the pulse laser. Protons generated by this laser originally had a continuous energy spectrum with no peaks. Radial focusing and defocusing effects caused by the transverse component of the RF field were also observed. Concerning these effects, we simulated the energy spectra from the calculated value of the electric field by POISSON; the simulation could almost reproduce the experimental results. By applying this beam as an injection beam of a synchrotron, a compact acceleration system for particle cancer therapy is expected to be realized.
Keywords :
Laser-ion production , Phase rotation , medical application , RF acceleration and focusing
