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- W3101471281 abstract "To maximize the charge of a high-energy electron beam accelerated by an ultra-intense laser pulse propagating in a subcritical plasma, the pulse length should be longer than both the plasma wavelength and the laser pulse width, which is quite different from the standard bubble regime. In addition, the laser--plasma parameters should be chosen to produce the self-trapping regime of relativistic channeling, where the diffraction divergence is balanced by the relativistic nonlinearity such that the laser beam radius is unchanged during pulse propagation in a plasma over many Rayleigh lengths. The condition for such a self-trapping regime is the same as what was empirically found in several previous simulation studies in the form of the pulse width matching condition. Here, we prove these findings for a subcritical plasma, where the total charge of high-energy electrons reaches the multi-nC level, by optimization in a 3D PIC simulation study and compare the results with an analytic theory of relativistic self-focusing. A very efficient explicitly demonstrated generation of high-charge electron beams opens a way to a high-yield production of gammas, positrons, and photonuclear particles." @default.
- W3101471281 created "2020-11-23" @default.
- W3101471281 creator A5072235314 @default.
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- W3101471281 date "2019-11-11" @default.
- W3101471281 modified "2023-10-16" @default.
- W3101471281 title "Generation of high-charge electron beam in a subcritical-density plasma through laser pulse self-trapping" @default.
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- W3101471281 doi "https://doi.org/10.1088/1361-6587/ab5142" @default.
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