摘要
We study the dynamics of single electron in an inhomogeneous cylindrical plasma channel during the direct acceleration by linearly polarized chirped laser pulse.By adjusting the parameters of the chirped laser pulse and the plasma channel,we obtain the energy gain,trajectory,dephasing rate and unstable threshold of electron oscillation in the channel.The influences of the chirped factor and inhomogeneous plasma density distribution on the electron dynamics are discussed in depth.We find that the nonlinearly chirped laser pulse and the inhomogeneous plasma channel have strong coupled influence on the electron dynamics.The electron energy gain can be enhanced,the instability threshold of the electron oscillation can be lowered,and the acceleration length can be shortened by chirped laser,while the inhomogeneity of the plasma channel can reduce the amplitude of the chirped laser.
作者
胡永南
成丽红
姚征伟
张小波
张爱霞
薛具奎
Yong-Nan Hu;Li-Hong Cheng;Zheng-Wei Yao;Xiao-Bo Zhang;Ai-Xia Zhang;Ju-Kui Xue(College of Physics and Electronics Engineering,Northwest Normal University,Lanzhou 730070,China;School of Science,Guizhou University of Engineering Science,Bijie 551700,China)
基金
the National Natural Science Foundation of China(Grant Nos.11865014,11765017,11764039,11475027,11274255,and 11305132)
the Natural Science Foundation of Gansu Province of China(Grant No.17JR5RA076)
the Scientific Research Project of Gansu Higher Education of China(Grant No.2016A-005)
the Natural Science Foundation of Education Department of Guizhou Province of China(Grant No.Qianjiaohe-KY-[2017]301)
the Science and Technology Project of Guizhou Province of China(Grant No.Qiankehe-LH-[2017]7008).