Anomalous absorption and scattering of short-pulse high-intensity lasers in underdense plasmas
- Departments of Physics and Electrical Engineering, University of California, Los Angeles, California 90095 (United States)
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
The propagation of short-pulse lasers through several Rayleigh lengths of underdense plasma [(1{endash}4){percent} {ital n}{sub cr}] is studied using multidimensional fully explicit particle-in-cell simulations. The simulations model 80 to 600 fs, 1 {mu}m wavelength pulses in the intensity range of 1.5{times}10{sup 17} to 3.5{times}10{sup 19} W/cm{sup 2}. A detailed account is given for the energy lost out of the focal cone due to a combination of collective absorption and scattering losses. The figure of merit for the nonlinear transmission losses of a given pulse length is the amount of Raman forward scattering exponentiation within a Rayleigh length. {copyright}{ital 1996 The American Physical Society.}
- OSTI ID:
- 285652
- Journal Information:
- Physical Review Letters, Vol. 76, Issue 18; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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