Simulations of proton beam characteristics for ELIMED Beamline

8th International Conference on Inertial Fusion Sciences and Applications

Psikal, Jan^1,2 ; Limpouch, Jiri^1,2 ; Klimo, Ondrej^1,2 ; Vyskocil, Jiri^1,2 ; Margarone, Daniele^2 ; Korn, Georg^2

FNSPE, Czech Technical University in Prague, Czech Republic^1

Institute of Physics, ELI-Beamlines Project, ASCR, Prague, Czech Republic^2

关键词: Beam characteristics;    Beam divergence;    Energy interval;    High intensity;    Oblique incidence;    Proton acceleration;    Proton radiotherapy;    Pulse length;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012088/pdf
DOI  :  10.1088/1742-6596/688/1/012088

来源: IOP

【 摘 要 】

ELIMED Beamline should demonstrate the capability of laser-based particle accelerators for medical applications, mainly for proton radiotherapy of tumours which requires a sufficient number of accelerated protons with energy about 60 MeV at least. In this contribution, we study the acceleration of protons by laser pulse with parameters accessible for ELIMED Beamline (intensity ∼ 1022W/cm2, pulse length ∼ 30 fs). In our two-dimensional particle-incell simulations, we observed higher energies of protons for linear than for circular polarization. Oblique incidence of the laser pulse on target does not seem to be favourable for proton acceleration at such high intensities as the accelerated protons are deflected from target normal axis and their energy and numbers are slightly decreased. The expected numbers of accelerated protons in the energy interval 60 MeV ± 5% are calculated between 109and 1010per laser shot with estimated proton beam divergence about 20° (FWHM).