Generating Proton Beams Exceeding 10 MeV Using High Contrast 60TW Laser  

作　　者：Yi-Xing Geng Qing-Liao Yin-Ren Shou Jun-Gao Zhu Xiao-Han Xu Min-Jian Wu Peng-Jie Wang Dong-Yu Li Tong-Yang Rong-Hao Hu Da-Hui Wang Yan-Ying Zhao Wen Jun Ma Hai-Yang Lu Zhong-Xi Yuan Chen-Lin Xue-Qing Yan 耿易星;廖庆;寿寅任;朱军高;徐筱菡;吴旻剑;王鹏杰;李东彧;杨童;胡荣豪;王大辉;赵研英;马文君;卢海洋;袁忠喜;林晨;颜学庆(State Key Laboratory of Nuclear Physics and Technology and CAPT,Peking University;Collaborative Innovation Center of Extreme Optics,Shanxi University)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology and CAPT,Peking University,Beijing 100871 [2]Collaborative hmovation Center of Extreme Optics,Shanxi University,Taiyuan 030006

出　　处：《Chinese Physics Letters》2018年第9期28-32,共5页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2013CBA01502;the National Natural Science Foundation of China under Grant Nos 11475010,11575011 and 11535001;the National Grand Instrument Project under Grant No 2012YQ030142

摘　　要：A prototype of a laser driven proton accelerator is built at Peking University. Protons exceeding IOMeV are accelerated from micrometer-thick aluminum targets irradiated by tightly focused laser pulse with 1.8 J energy and 30fs duration. The beam energy spectrum and charge distribution are measured by a Thomson parabola spectrometer and radiochromic fihn stacks. The sensitivity of proton cut-off energy to the focusing of the laser beam, the pulse duration, and the foil thickness are systematically investigated in the experiments. Stable proton beams have been produced with an optimized parameter set, providing a cornerstone for the future applications of laser accelerated protons.A prototype of a laser driven proton accelerator is built at Peking University. Protons exceeding IOMeV are accelerated from micrometer-thick aluminum targets irradiated by tightly focused laser pulse with 1.8 J energy and 30fs duration. The beam energy spectrum and charge distribution are measured by a Thomson parabola spectrometer and radiochromic fihn stacks. The sensitivity of proton cut-off energy to the focusing of the laser beam, the pulse duration, and the foil thickness are systematically investigated in the experiments. Stable proton beams have been produced with an optimized parameter set, providing a cornerstone for the future applications of laser accelerated protons.

关 键 词：Generating Proton Beams Exceeding 10 MeV Using High Contrast 60TW Laser 

分 类 号：TN248[电子电信—物理电子学]