Showing papers by "Barbara F. Lasinski published in 1980"
TL;DR: In this article, computer simulations of the reflection and heating due to stimulated Raman scattering of intense laser light in large regions of underdense plasma were presented, showing that the heated electron distribution is approximately a Maxwellian of temperature.
Abstract: This Letter presents computer simulations of the reflection and heating due to stimulated Raman scattering of intense laser light in large regions of underdense plasma. The heated electron distribution is approximately a Maxwellian of temperature $\frac{1}{2}{m}_{e}{{v}_{p}}^{2}$. A simple model of the reflection is presented. Forward Raman scattering was also observed producing extremely energetic electrons. Finally, two-dimensional simulations showed sizable Raman scattering coexisting with heating by the $2{\ensuremath{\omega}}_{\mathrm{pe}}$ instability. Raman scattering may cause a preheat problem with large laser-fusion-reactor targets.
107 citations
TL;DR: The behavior of Raman backscatter of intense laser light in a high temperature, inhomogeneous plasma is examined in theory and simulations in this paper, where significant levels of reflected light are found near ω 0/2, a frequency which is not commonly monitored in experiments.
Abstract: The behavior of Raman backscatter of intense laser light in a high temperature, inhomogeneous plasma is examined in theory and simulations. Plasma conditions thought to be characteristic of recent long pulse length experiments are considered. Significant levels of reflected light are found near ω0/2, a frequency which is not commonly monitored in experiments. It is shown that the plasma temperature leads to a sizable shift of the spectrum to frequencies below ω0/2. Conditions for significant Raman backscatter at densities much less than one‐fourth the critical density are also briefly considered.
45 citations