Ion beam control in laser plasma interaction

8th International Conference on Inertial Fusion Sciences and Applications

Kawata, S.^1 ; Izumiyama, T.^1 ; Sato, D.^1 ; Nagashima, T.^1 ; Takano, M.^1 ; Barada, D.^1 ; Gu, Y.J.^1,2 ; Ma, Y.Y.^1,3 ; Kong, Q.^2 ; Wang, P.X.^2 ; Wang, W.M.^4

Department of Advanced Interdisciplinary Sciences, Utsunomiya University, Utsunomiya, Japan^1

Institute of Modern Physics, Fudan University, Shanghai, China^2

Department of Physics, National University of Defence Technology, Changsha, China^3

Institute of Physics, CAS (Chinese Academy of Sciences), Peking, China^4

关键词: High-energy electron;    Intense short pulse lasers;    Laser ion acceleration;    Laser-plasma interactions;    Magnetic field strengths;    Particle-in-cell simulations;    Strong magnetic fields;    Target-normal sheath accelerations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012045/pdf
DOI  :  10.1088/1742-6596/688/1/012045

来源: IOP

【 摘 要 】

By a two-stage successive acceleration in laser ion acceleration, our 2.5-dimensional particle-in-cell simulations demonstrate a remarkable increase in ion energy by a few hundreds of MeV; the maximum proton energy reaches about 250MeV. The ions are accelerated by the inductive continuous post-acceleration in a laser plasma interaction together with the target normal sheath acceleration and the breakout afterburner mechanism. An intense short-pulse laser generates a strong current by high-energy electrons accelerated, when an intense short- pulse laser illuminates a plasma target. The strong electric current creates a strong magnetic field along the high-energy electron current in the plasma. During the increase phase in the magnetic field strength, the moving longitudinal inductive electric field is induced by the Faraday law, and accelerates the forward-moving ions continously. The multi-stage acceleration provides a unique controllability in the ion energy and its quality.