Quasi-monoenergetic electron beam generation during laser pulse interaction with very low density plasmas
- Advanced Photon Research Center, Japan Atomic Energy Research Institute, 8-1, Umemidai, Kizu-cho, Soraku-gun, Kyoto 619-0215 (Japan)
The results of experiments are presented for the single laser pulse interaction with a very low density gas target, under the conditions when the generated wake wave is below the wave-breaking threshold and the laser pulse power is lower than the critical power for relativistic self-focusing. A quasi-monoenergetic electron beam is found to be stably generated for various laser pulse intensity values by controlling the acceleration length. The results of two-dimensional particle-in-cell simulations show that for the electron acceleration an additional mechanism of electron injection into the acceleration phase is required. It is demonstrated that the longitudinal inhomogeneity of the plasma density leads to the electron injection.
- OSTI ID:
- 20764551
- Journal Information:
- Physics of Plasmas, Vol. 12, Issue 9; Other Information: DOI: 10.1063/1.2017842; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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