Scattering of ultrashort laser pulses on “ion‐sphere” in dense plasmas

• Published in: Contributions to plasma physics (1988) 2019-02, Vol.59 (2), p.189-196
• Main Authors: Rosmej, F.B., Astapenko, V.A., Lisitsa, V.S., Li, Xiangdong, Khramov, E.S.
• Format: Article
• Language: English
• Subjects: Atomic Physics; Carrier frequencies; Dense plasmas; Density distribution; dynamical polarizability; Electromagnetic pulses; Electron density; Electron distribution; Electron energy; Free electrons; Ion density (concentration); ion sphere; local plasma frequency; Physics; Plasma; Plasma frequencies; Poisson equation; Polarizability; Pulse duration; scattering cross section; Scattering cross sections; scattering probability; Strongly coupled plasmas; Time dependence; ultrashort laser pulse
• ISSN: 0863-1042; 1521-3986
• DOI: 10.1002/ctpp.201800062

Scattering of ultrashort electromagnetic pulses on the dense strongly coupled plasma is under consideration in the frame of hard ion sphere model. The electron distribution inside the ion sphere is obtained from self‐consistent solution of the Shrodinger equation for bound electrons and the Poisson equation for free electrons. The electron density distribution is determined by plasma electron temperatures. The ion density of Al plasmas under consideration is of the order of 1020–1022 cm−3, the electron temperature changes between 54 and 816 eV. Dynamical polarizability of the hard sphere determining the scattering cross sections is calculated using the modified local plasma frequency approximation. The spectrum of scattering cross section has maxima in the vicinity of the mean plasma frequency. Dependencies of scattering probability on carrier frequency and pulse duration are analysed in detail. The transition of the total scattering probabilities from nonlinear time dependence at small times to standard linear ones with the increase of pulse duration is demonstrated.