The optimum conditions of laser field depletion in laser-electron beam collision
arXiv:1808.01449 · doi:10.1063/1.5054856
Abstract
The laser field depletion in laser-electron beam collision is generally small. However, a properly chosen parameter of the laser and electron, the laser field depletion can be optimized. To access the laser energy evolution, simulations of laser-electron beam collision by Particle-in-Cell (PIC) simulation is performed. In this paper, the laser and electron parameters are chosen such that the ponderomotive force is compensated by the radiation reaction force in the head-on collision configuration. Then, the relativistic electron beam can quiver in the laser pulse for a longer time to increase the energies conversion. The optimum of laser field energy depletion is observed at and limited beyond this point due to the impenetrability threshold. The total energy conversion from laser and electron beam into radiation emission is optimum at . This conversion efficiency can be up to several percent for an electron bunch with charges of a few nC. This efficient gamma-ray sources may provide some useful application in photonuclear experiments.
arXiv comment6 pages, 2 figures, 1 tabel
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