Laser wake-field acceleration and optical guiding in a hollow plasma channel

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  • T. C. Chiou
    Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, California 90089-0484
  • T. Katsouleas
    Department of Electrical Engineering–Electrophysics, University of Southern California, Los Angeles, California 90089-0484
  • C. Decker
    University of California, Los Angeles, California 90024
  • W. B. Mori
    University of California, Los Angeles, California 90024
  • J. S. Wurtele
    Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • G. Shvets
    Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • J. J. Su
    National Central University, Taiwan, Republic of China

抄録

<jats:p>The accelerating and focusing wake fields that can be excited by a short laser pulse in a hollow underdense plasma are examined. The evacuated channel in the plasma serves as an optical fiber to guide the laser pulse over many Rayleigh lengths. Wake fields excited by plasma current at the edge of the channel extend to the center where they may be used for ultrahigh gradient acceleration of particles over long distances. The wake field and equilibrium laser profiles are found analytically and compared to two-dimensional (2-D) particle-in-cell (PIC) simulations. Laser propagation is simulated over more than ten Rayleigh lengths. The accelerating gradients on the axis of a channel of radius c/ωp are of order of one-half of the gradients in a uniform plasma. For present high-power lasers, multi-GeV/m gradients are predicted.</jats:p>

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