High Power Laser Science and Engineering, Volume. 7, Issue 3, 03000e39(2019)
Collective absorption of laser radiation in plasma at sub-relativistic intensities
Fig. 1. (a) The pulse shape and the selected representative points for the kinetic simulations. (b) Typical filamentation structure observed in our simulations and represented by the electron density distribution at the time corresponding to the laser pulse maximum in panel (a).
Fig. 2. (a) Dependence of the longitudinal component of the electron energy flux
Fig. 3. (a) Distribution of the electron energy flux entering the overcritical plasma
Fig. 4. (a) Magnetic field Fourier spectrum in the part of the simulation box corresponding to the densities below the quarter critical as a function of the longitudinal and transverse components of the wavevector. Color bar is in a logarithmic scale. (The spectrum calculated from the instantaneous code output provides only the absolute values of the wavevector components.) (b) Frequency spectra of the backward propagating radiation recorded at the front boundary of the simulation box during the quasi-steady phase of interaction, for different conditions according to Table
Fig. 5. (a) Fourier spectra of electromagnetic waves, (b) electron plasma waves – charge density, and (c) ion acoustic waves in the quarter critical density region for the laser pulse time
Fig. 6. (a) Distribution of the Poynting vector (
Fig. 7. (a) Spatial distribution of the Poynting vector (
Fig. 8. Fourier spectra of (a) electromagnetic waves, (b) electron plasma waves – charge density, and (c) ion acoustic waves in the region around critical density for the laser pulse time
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Y. J. Gu, O. Klimo, Ph. Nicolaï, S. Shekhanov, S. Weber, V. T. Tikhonchuk. Collective absorption of laser radiation in plasma at sub-relativistic intensities[J]. High Power Laser Science and Engineering, 2019, 7(3): 03000e39
Special Issue: HIGH ENERGY DENSITY PHYSICS AND HIGH POWER LASERS
Received: Nov. 28, 2018
Accepted: Jun. 3, 2019
Published Online: Jul. 12, 2019
The Author Email: Y. J. Gu (yanjun.gu@eli-beams.eu)