Electron Acceleration by a Laser Wakefield in a Relativistically Self-Guided Channel

摘要: Acceleration of electrons to relativistic energies by a multidimensional self-modulated laser wakefield is discussed. Above power threshold, relativistically self-guided channel from an intense ultrashort pulse ( $I\ensuremath{\sim}4\ifmmode\times\else\texttimes\fi{}{10}^{18}\mathrm{W}/{\mathrm{cm}}^{2}$, $\ensuremath{\lambda}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1\ensuremath{\mu}\mathrm{m}$, $\ensuremath{\tau}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}400\mathrm{fs}$) was found increase the propagation distance, decrease electron beam divergence, and energy electrons. These effects occurred even though distance became significantly longer than conventional dephasing length.