A short overview of the theory of acceleration of thin foils driven by the radiation pressure of superintense lasers is presented. A simple criterion for radiation pressure dominance at intensities around 5×1020W...A short overview of the theory of acceleration of thin foils driven by the radiation pressure of superintense lasers is presented. A simple criterion for radiation pressure dominance at intensities around 5×1020W cm-2is given, and the possibility for fast energy gain in the relativistic regime is discussed.展开更多
Multidimensional instabilities always develop with time during the process of radiation pressure acceleration,and are detrimental to the generation of monoenergetic proton beams.In this paper,a sharp-front laser is pr...Multidimensional instabilities always develop with time during the process of radiation pressure acceleration,and are detrimental to the generation of monoenergetic proton beams.In this paper,a sharp-front laser is proposed to irradiate a triple-layer target(the proton layer is set between two carbon ion layers)and studied in theory and simulations.It is found that the thin proton layer can be accelerated once to hundreds of MeV with monoenergetic spectra only during the hole-boring(HB)stage.The carbon ions move behind the proton layer in the light-sail(LS)stage,which can shield any further interaction between the rear part of the laser and the proton layer.In this way,proton beam instabilities can be reduced to a certain extent during the entire acceleration process.It is hoped such a mechanism can provide a feasible way to improve the beam quality for proton therapy and other applications.展开更多
基金Support from the Italian Ministry of University and Research via the FIR project ‘SULDIS’
文摘A short overview of the theory of acceleration of thin foils driven by the radiation pressure of superintense lasers is presented. A simple criterion for radiation pressure dominance at intensities around 5×1020W cm-2is given, and the possibility for fast energy gain in the relativistic regime is discussed.
基金supported by the National Natural Science Foundation of China (No. 11575274)Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB16010600)Ministry of Science and Technology of the People’s Republic of China (Nos. 2016YFA0401102 and 2018YFA0404803)
文摘Multidimensional instabilities always develop with time during the process of radiation pressure acceleration,and are detrimental to the generation of monoenergetic proton beams.In this paper,a sharp-front laser is proposed to irradiate a triple-layer target(the proton layer is set between two carbon ion layers)and studied in theory and simulations.It is found that the thin proton layer can be accelerated once to hundreds of MeV with monoenergetic spectra only during the hole-boring(HB)stage.The carbon ions move behind the proton layer in the light-sail(LS)stage,which can shield any further interaction between the rear part of the laser and the proton layer.In this way,proton beam instabilities can be reduced to a certain extent during the entire acceleration process.It is hoped such a mechanism can provide a feasible way to improve the beam quality for proton therapy and other applications.
