激光尾流场的2.5维粒子模拟
２dimensional PIC simulation of the generation of wakefield
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摘要: 用2D3V PIC粒子模拟方法分析了超短脉冲超强激光在稀薄等离子体中激发尾流场的产生过程及电子在尾流场中的加速过程。“前向Raman散射”使得激光脉冲沿传播方向拉长，脉冲的尾部变陡，它导致静电场的相速度和饱和时超热电子的最大动能明显减小，也使得激发尾流场的最佳脉冲宽度变小。Abstract: We analysis the wakefield generation and the electrons acceleration when ultraintense short laser pulse propagate through tenuous plasma with 2D3V PIC simulation model．The effects of FRS elongates the length of the laser pulse as well as steeps the tail of the pulse which results in the notable reduces of the electrostatic phase velocity and maximum electron kinetic energy achieved when traped．At the same time the most effective length of the laser pulse to stimulate the wake-field becomes longer.
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Key words:
- wakefield /
- forward raman scattering /
- ponderomotive force /
- electron trap
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