Time-resolved and time-averaged determination of the electron-ion collision frequency and electron stopping force in an intense laser field at critical plasma density
Using a ballistic dynamic equation (oscillator model) in the presence of an intense laser field (upsilon(osc)>>upsilon(th)) the time-resolved and time-averaged electron stopping force and electron-ion collision frequency are determined at the critical density (omega(0)=omega(p)) in the presence of laser field harmonics. An expression for the time-averaged energy absorption rate is given. Results show the contributions of single-particle effects and the generated laser harmonics to the electron-ion collision frequency and energy absorption rate. This work also discusses the time-resolved electron-ion collision frequency.
Al-Khateeb
AM
Department of Physics, Faculty of Science, Yarmouk University, Irbid, Jordan.