Characteristics of the Betatron Radiation from the Direct-Laser Accelerated Electrons

POSTER

Abstract

The underlying scalings of the direct-laser accelerated electrons and the radiated photons are investigated. The dependence of the radiation properties on the plasma density and laser intensity is given analytically. It is shown that the electron dynamics and the emitted photons are strongly dependent on a self-similar parameter of $n_e/n_ca_0$. This controls the energy gain and the transverse betatron amplitude of the electrons, as well as the radiated photon number and photon energy. In addition, it is shown that the total number of the photons is proportional to $a_0^2$ and the conversion efficiency of the photons from the accelerated electrons is proportional to $a_0^3$ for a fixed value of $n_e/n_ca_0$. . .

*This work is supported by the National Natural Science Foundation of China, (91230205), the National Basic Research 973 Project, No. 2013CB834100, and the National High-Tech 863 Project. T. W. H. acknowledges the support from China Scholarship Council.

Authors

  • Taiwu Huang

    • Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China
    • Peking Univ

  • Alex Robinson

    • Central Laser Facility, STFC Rutherford-Appleton Laboratory, Didcot, OX11 0QX, United Kindom

  • Cangtao Zhou

    • Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China

  • Bin Qiao

    • Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China

  • Bin Liu

    • Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China

  • Xiantu He

    • Center for Applied Physics and Technology and School of Physics, Peking University, Beijing 100871, People's Republic of China

  • Peter Norreys

    • Central Laser Facility, STFC Rutherford-Appleton Laboratory, Didcot, OX11 0QX, United Kindom