Chirped wideband pump and seed pulses are usually considered for backward Raman amplification（BRA） in plasmas to achieve an extremely high-power laser pulse. However, current theoretical models only contain either a...Chirped wideband pump and seed pulses are usually considered for backward Raman amplification（BRA） in plasmas to achieve an extremely high-power laser pulse. However, current theoretical models only contain either a chirped pump or a chirped seed. In this paper, modified three-wave coupling equations are proposed for the BRA in the plasmas with both chirped wideband pump and seed. The simulation results can more precisely describe the experiments, such as the Princeton University experiment. The optimized chirp and bandwidth are determined based on the simulation to enhance the output intensity and efficiency.展开更多
In inertial confinement fusion, the laser plasma interaction （LPI） happens when the high-energy laser irradi- ates on the target where the scattered light share generated from the stimulated Raman scattering （SRS）...In inertial confinement fusion, the laser plasma interaction （LPI） happens when the high-energy laser irradi- ates on the target where the scattered light share generated from the stimulated Raman scattering （SRS） effect is difficult to suppress. We propose a method using fence pulses （FPs） to suppress the backward SRS by inhibiting the growth of the intensity of electron plasma waves. Based on our simulation, the FPs can weaken SRS effect in the LPI effectively.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11305157)the Development Foundation of China Academy of Engineering Physics Laboratory(CAEPL)(Grant No.2013A0401019)
文摘Chirped wideband pump and seed pulses are usually considered for backward Raman amplification（BRA） in plasmas to achieve an extremely high-power laser pulse. However, current theoretical models only contain either a chirped pump or a chirped seed. In this paper, modified three-wave coupling equations are proposed for the BRA in the plasmas with both chirped wideband pump and seed. The simulation results can more precisely describe the experiments, such as the Princeton University experiment. The optimized chirp and bandwidth are determined based on the simulation to enhance the output intensity and efficiency.
文摘In inertial confinement fusion, the laser plasma interaction （LPI） happens when the high-energy laser irradi- ates on the target where the scattered light share generated from the stimulated Raman scattering （SRS） effect is difficult to suppress. We propose a method using fence pulses （FPs） to suppress the backward SRS by inhibiting the growth of the intensity of electron plasma waves. Based on our simulation, the FPs can weaken SRS effect in the LPI effectively.
