Measurements of forward scattered spectra from intense laser interactions in the forced laser wake-field regime
Measurements of forward scattered spectra from intense laser interactions in the forced laser wake-field regime
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DOI：
10.1088/0741-3335/48/1/003
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发表时间：
2005
影响因子：
2.2
通讯作者：
B. Walton;S. Mangles;Z. Najmudin;Karl Krushelnick;A. Dangor;F. Burgy;S. Fritzler;V. Malka
中科院分区：
文献类型：
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作者：
B. Walton;S. Mangles;Z. Najmudin;Karl Krushelnick;A. Dangor;F. Burgy;S. Fritzler;V. Malka
描述了利用超短激光脉冲通过强迫激光尾迹过程产生等离子体波的实验结果。传输的光谱显示出红移和蓝移，这可能是由于激光脉冲与大幅度等离子体波之间的相互作用而产生的自相位调制。没有与前向拉曼不稳定性(FRS)相关的等离子体频率倍数移动的光谱边带，这表明观测到的加速电子的等离子体波很可能不是通过FRS过程产生的。讨论了使用与实验相似的参数的一维和二维粒子单元模拟。
Results of an experiment using an ultra-short laser pulse to create plasma waves through the forced laser wake-field process are described. The transmitted optical spectra are shown to exhibit both red- and blue-shifting, likely due to self-phase modulation through the interaction between the laser pulse and a large amplitude plasma wave. Spectral side-bands shifted by multiples of the plasma frequency associated with the forward Raman instability (FRS) are absent, indicating that the plasma waves which are observed to accelerate electrons are likely not generated through the FRS process. One- and two-dimensional particle-in-cell simulations using similar parameters as the experiment are discussed.