Large amplitude electromagnetic solitons in intense laser plasma interaction |
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Authors: | Li Bai-Wen S Ishiguro and M M Skoric |
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Institution: | Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; The Graduate University for Advanced Studies and National Institute for Fusion Science, Toki 509-5292, Japan |
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Abstract: | This paper shows that the standing, backward- and forward-accelerated large
amplitude relativistic electromagnetic solitons induced by intense laser pulse in
long underdense collisionless homogeneous plasmas can be observed by particle
simulations. In addition to the inhomogeneity of the plasma density, the
acceleration of the solitons also depends upon not only the laser amplitude but also
the plasma length. The electromagnetic frequency of the solitons is between about
half and one of the unperturbed electron plasma frequency. The electrostatic field
inside the soliton has a one-cycle structure in space, while the transverse electric
and magnetic fields have half-cycle and one-cycle structure respectively. Analytical
estimates for the existence of the solitons and their electromagnetic frequencies
qualitatively coincide with our simulation results. |
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Keywords: | particle-in-cell (PIC) Raman cascade photon-condensation relativistic EM soliton |
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