研究目的
Investigating the interaction features and energy transfer characteristics of two co-propagating laser beams in underdense plasmas.
研究成果
The interaction features and energy transfer characteristics of two co-propagating laser beams in underdense plasmas can be described by a relatively simple expression derived from the coupled NSEs. The energy transfer depends nonlinearly on the initial phase difference, laser intensity, spot size, and separation distance, verified by numerical solutions and PIC simulations.
研究不足
The model breaks down if the distance between the two lasers is smaller than a certain threshold, leading to merging of laser-driven channels. The study focuses on an initial interaction stage for short propagation distances.
1：Experimental Design and Method Selection:
The study uses the nonlinear Schr?dinger equations (NSEs) for the envelopes of the lasers and two-dimensional (2D) particle-in-cell (PIC) simulation to investigate the interaction.
2：Sample Selection and Data Sources:
The initial Gaussian laser beams are given by specific parameters including amplitudes, spot radii, separation distance, and initial phases.
3：List of Experimental Equipment and Materials:
The simulation uses the EPOCH code for PIC simulation.
4：Experimental Procedures and Operational Workflow:
The simulation box is set with specific dimensions and grids, with lasers incident from the left boundary into the plasma.
5：Data Analysis Methods:
The evolution of the total laser power in the half space is analyzed to understand energy transfer characteristics.
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