Simulation of electron bunch generation by an ultrashort-pulse high-intensity laser-driven wakefield |
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| Authors: | M. Yamagiwa S. V. Bulanov T. Zh. Esirkepov J. Koga M. Kando Y. Ueshima K. Saito D. Wakabayashi |
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| Affiliation: | (1) Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Agency, 8-1 Umemidai, Kizu, Kyoto 619-0215, Japan;(2) Research Organization for Information Science and Technology, Tokai, Ibaraki 319-1106, Japan;(3) Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region, 141700, Russia;(4) General Physics Institute of RAS, Moscow, 119991, Russia |
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| Abstract: | Electron acceleration due to a wakefield excited by a ultrashort-pulse intense laser propagating through a finite-length underdense plasma layer is studied by two-dimensional particle-in-cell simulation. The electron energy distribution is analyzed for moderate to high intensity. For the electron density, where the pulse length is almost half of the plasma wavelength, dramatic changes of the density structure occur with cavity and bunch formation with an increase in the laser intensity, also leading to the appearance of a fast electron component well confined in phase space. The analytical form of the fast electron energy spectrum is also presented. |
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