レーザーイオン加速と医療応用

概要

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Approach to downsize an accelerator for particle-cancer therapy with the use of a very high acceleration-gradient by laser-plasma interaction has been performed combining laser-produced ions with a conventional RF acceleration technique. Protons produced by a high peak-power (∼a few tens TW) short-pulse (<50 fs) laser from a thin solid foil target several μm in thickness has been improved in its beam chracteristics by combination of a “Phase Rotation” and electron beam cooling in order to be accelerated with a short-rising-time (∼5 ms) synchrotron to the energy of ∼200 MeV needed for cancer-therapy. In the present paper, the scheme to improve the characteristics of the laser-produced protons in the longitudinal phase space by “Phase Rotation”, which has been demonstrated in its feasibility experimentally, is described together with the procedure of laser proton production.
日本真空協会の論文
2009-08-20