摘要： We study theoretically and numerically the acceleration of protons by a combination of laser radiation pressure acceleration and Coulomb repulsion of carbon ions in a multi-ion thin foil made of carbon and hydrogen. The carbon layer helps to delay the proton layer from disruption due to the Rayleigh-Taylor instability, to maintain the quasi-monoenergetic proton layer and to accelerate it by the electron-shielded Coulomb repulsion for much longer duration than the acceleration time using single-ion hydrogen foils. Particle-in-cell simulations with a normalized peak laser amplitude of a0 = 5 show a resulting quasi-monoenergetic proton energy of about 70 MeV with the foil made of 90% carbon and 10% hydrogen, in contrast to 10 MeV using a single-ion hydrogen foil. An analytical model is presented to explain quantitatively the proton energy evolution; this model is in agreement with the simulation results. The energy dependence of the quasi-monoenergetic proton beam on the concentration of carbon and hydrogen is also studied. 其他題名： NJP 其他題名： New J. Phys 出版者： IOP Publishing 出版日期： 2013-02-19 出處： New Journal of Physics, 2013-02, Vol.15 (2), p.25026-16 資源來源： Institute of Physics Open Access (via IOPscience) 版權： IOP Publishing and Deutsche Physikalische Gesellschaft 識別號： ISSN: 1367-2630 識別號： EISSN: 1367-2630 識別號： DOI: 10.1088/1367-2630/15/2/025026 識別號： CODEN: NJOPFM
