Quasi-monoenergetic Tens-of-MeV Proton Beams by a Laser-Illuminated Funnel-Like Target  

作　　者：BAN Hong-Ye GU Yan-Jun KONG Qing LI Ying-Ying ZHU Zhen S.Kawata 班洪叶;顾彦珺;孔青;李英瑛;朱真;S.Kawata(Applied Ion Beam Physics Laboratory,Key Laboratory of the Ministry of Education,Institute of Modern Physics,Fudan University,Shanghai 200433;Department of Interdisciplinary Sciences,Utsunomiya University,Yohtoh 712,Utsunomiya 3218585,Japan)

机构地区：[1]Applied Ion Beam Physics Laboratory,Key Laboratory of the Ministry of Education,Institute of Modern Physics,Fudan University,Shanghai 200433 [2]Department of Interdisciplinary Sciences,Utsunomiya University,Yohtoh 712,Utsunomiya 3218585,Japan

出　　处：《Chinese Physics Letters》2012年第3期142-145,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11175048;the Shanghai Nature Science Foundation(No 11ZR1402700);the Shanghai Scientific Research Innovation Key Project(No 12ZZ011);The Shanghai Leading Academic Discipline Project(B107);the JSPS-CAS CUP Program and the CORE of Utsunomiya University.

摘　　要：From numerical simulations,we study the generation of quasi-monoenergetic MeV proton beams from a laserilluminated funnel-like target.We show that,when passing through such a target,the laser beam can be focused and constricted within a cylindrical bore at the funnel apex from which proton beams are produced.Accompanied by a much-enhanced laser intensity,the proton beams experience more acceleration time than with normal funnel targets.Constriction from the cylinder bore,combined with an enhancement of a separated charge field from Al electrons,protons can attain higher energies up to several tens of MeV.At the same time,strong suppression of the transverse divergence of the laser and proton beams yields a localized,collimated,mono-energetic proton beam.

关 键 词：STRICT cylindrical cylinder 

分 类 号：O57[理学—粒子物理与原子核物理]